Valab stepped attenuator. I have valab 23 step attenuator installed.
This step attenuator is comprised on several individually controlled attenuation steps: 1, 2, 4, 8, 16, 32 and 32dB. Jun 2, 2012 · I bought a valab stepped attenuator to fit in my NAC-72, but there are no indications on it which terminals are which- how the heck do I know what's what, and which terminals go to which on the 72? Cheers. stepped attenuator in place of the stock pot. And not DACT. It is a key know how of hi-end aud Mar 28, 2011 · Stepped attenuator as an upgrade? Thread starter deltaunit; Start date Mar 28, 2011; D. I also have used the PEC audio pot which was about $35 and like it very much. Shunt, series and ladder types. But unlike common potentiometers (or other stepped attenuator brands), our stepped attenuators provide very clear sound and precise signal level matching. 01 dB). Yuan Jing TPA3116D2 (black board) amplifier good for approximately 25 watts with included 12v 5a power supply. I've used the Valab stepped type with good results. Valve amps may be the only gear that can successfully match up with a 100k attenuator. The transformer is prewired to the the switch inside the enclosure with only the input and the output connections exiting the case. Oct 11, 2015 · One of the main advantages of a stepped attenuator is that you can achieve very close matching of the channels using very common 1% MF resistors (1% --> +/-0. Attenuation Range: 0-50 dB in 1 dB steps 3. Feb 3, 2020 · The TCJ Attenuator A3 is an interesting design: a hybrid attenuator that uses both series and ladder attenuators to yield the best compromise between flexibility, performance, and cost. Apr 25, 2024 · For example programmable attenuator model 50P-1857 has range 0-95dB x 1dB and is a solid-state type of step attenuator. Valab Ultra fast Low Noise High Voltage Bridge Rectifier Experienced audio diyers will agree, rectifiers do play a key role in sound performance of audio equipments. The 95dB setting is the maximum attenuation setting. proper grounding in the Crack when I swap in the Valab stepped attenuator. Must confess I'd be wary of using a tupperware container. 1% 25 ppm. The sound seems fine but I long for a nice smooth expensive feeling pot whilst keeping the SQ high. This brings about several advantages: The input impedance is not restricted by the value of the volume control (input attenuator). Mar 5, 2021 · It turns out that the 100kΩ 34-step resistor table applied to a 23-step attenuator works like a charm providing better log functionality than the pot. This indeed comes before the grid of Oct 17, 2011 · You want a ladder attenuator! The circuit is built of 23 pairs of resistors and you select the pair you want for volume. Here's the values for the 12th step: Merlin's - 1036 (24 step) Valab - 2100 (23 step) Khozmo - 3600 (24 step) Goldpoint - 4990 (24 step) Alps - 11200 (22 step) The Khozmo looks to be about the "middle" of the range. Valab ® provides additional information on the validation screens of the LIS and draws the attention of the validation specialists to any results that cannot be explained or are incoherent, or which have alert, critical or must-see values. V3 Mini (the “Mini” ) is a high resolution panel mounted electronic stepped attenuator that offers exceptional sonic performance with advantages that no mechanical attenuator can match including a high resolution 100 step volume control, local & remote control, channel balance adjustment, muting and optional menu driven high contrast OLED display. Sounds good though Apr 17, 2019 · I'm replacing the standard pot and have two options - a Valab stepped/laddered with a 100k resistance, or an Alps black beauty (second hand) at 20k. I looked at the DACT offerings, but they are way too expensive for this project. Welcome, Guest. Dec 7, 2012 · Great, thanks, I think I shall keep my eyes peeled for a late 44 then. Jan 19, 2011 · I tried my DACT 100k mono attenuators in the HF-81. Aug 24, 2020 · Source is a Vref modded dam1021 (rev2) DAC that’s hooked up via and XMOS USB interface to a WIN10 minimac running foobar2k with an ASIO plugin. Coupled with our standard USB & Ethernet control interfaces, these devices are easily integrated into any test system for simulation of transmission loss, signal fading, cross talk and power level calibration. I would like to thank JamieMcC and Caucasian Blackplate for their posts on the Valab. why? because potentiometers, like electrolytic caps, are cheap and easy but not ideal for audio. Connected to the amp via the Mar 29, 2019 · I've had one of these sitting in my inventory for a couple of months now, waiting to put it in the BA-3 preamp. The Valab stepped attenuators use Japan made KOA 1/4W 1% 25ppm precision resistors. The 36 step version is currently available, only introduced to the market in 2018. The box is very flexible though, and it’s very easy to move the RCA sockets by accident. NAC 72 meets Valab stepped attenuator. Aug 22, 2017 · I've been reading plenty of threads on PFM about the quality of Goldpoint stepped attenuators. If you do need to drill out the chassis, just be sure to support the bottom of the plate with a piece of wood (and leave the paper making on until you're finished). com but it broke immediately. I built a pair of these a couple Feb 6, 2012 · Hey everyone and thanks for reading my post. News: July 14, 2023, 07:29:10 PM. I rewired the signal path with #20 teflon ohno continuous cast wire. Sep 8, 2011 · Hi I bought this : Valab 23 Step Attenuator Potentiometer 100K Stereo Log | eBay Before installing it , i made measurements with a multimeter for its resistance values in different positions. So far, I’ve been looking at several articles and YouTube videos and here are the ones that I think the most useful. Before, I usually operated the volume knob between 9 and 9. It is a remarkably good sounding thing (the wiring is HiFiCollective’s cloth-covered solid-core stuff, can’t remember the brand)! Mar 31, 2008 · Hi guys, I bought one of these attenuators off eBay and I wired it up to my Millet Hybrid. with a stepped attenuator, your signal is always passing through discrete components Re: Valab 23 step « Reply #2 on: December 28, 2014, 02:06:48 PM » Feeech, yes I put a 100k in my Crack, but I asked the question here about the Stereomour because Paul had mentioned that it was a somewhat difficult procedure. VALAB 23 STEP Ladder Type Attenuator Potentiometer 100K Log Stereo - $35. Re: Got my Valab 23 Step Attenuator Reply #2 on: December 22, 2016, 11:21:56 AM Like I mention on the original post, it makes the spacing of sound much more wider and sacrifices some of the center mix in the music. MECA’s 685-50-1 N-Female variable step attenuator features a frequency range of Hz - 2. 19-09-2019, 15:44. 3dB NEW. I mentioned that with conventional attenuators, the frequency response can vary with volume. May 25, 2006 · Things that go screech in the night I have been successfully using Uriah's LightSpeed clone for several months to drive a small Class D amp (with my main system using The Lighter Note). Of course it needs to be log/audio taper, discrete resistors are preferable over SMDs (for some reason they don't sound as good) and f Nov 22, 2015 · Stereo Amplifiers & Pre-Amps Valab ® is a computer-aided medical biology validation tool for automatic validation . Puffin pfm Member. I'm sure the Goldpoint and Khozmo with 47-48 steps are better, but they are stupid expensive. Mar 10, 2011 #8 The Keysight 8495B dc to 18 GHz manual step attenuator offers exceptional repeatability and reliability. I have valab 23 step attenuator installed. Linear taper Nov 1, 2012 · The first stepped attenuators i bought were from an Asian seller on Ebay. Mar 1, 2021 · I’ve been looking for my next project to fill in my free time and DIY stepped attenuator caught my eyes. Assembling guide How To Assemble A Mono/Stereo Ladder Stepped Attenuator - YouTube Resistor configuration and calculator Calculate Stepped Attenuator (24 steps) Another The short answer is a stepped attenuator is a type of volume control device. It provides attenuation in 10-dB steps from 0 to 70 dB. Oct 6, 2018 · The Valab is a bit crap tbh. Precision gold-plated leaf springs ensure long life (over 5 million cycles) and very high attenuator repeatability (typically 0. All Goldpoint stepped attenuators have make-before-break switch contacts, so as not to create "clicks" or "pops" while changing VAA – Advanced Variable Attenuator. kikitronic | eBay Their build it yourself kits are good value but having built one before i would happily pay someone else to do it in future. Next Variable/Step Attenuator Transmission Line 1W average -100W peak 0. I fitted one to my S. I don't know if I'm lucky, the measurements were identical with both channels. Is that one of them valab stepped attenuators? Thanks. Re: Valab Stepped Attenuator and Speedball PCB Space Clearance? Reply #2 on: December 11, 2013, 05:46:41 PM I can't find any verification on this at the moment. Nov 3, 2010 · Though, after switch on, flat and undynamic - not very impressed; but given an hour or so, WOW huge soundstage and an almost "see through" clarity to go with it, so well worth the hassle of fitting for those inclined, but beware the mounting hole in your Naim sled will require opening to 10mm dia and the securing nut supplied with the Find many great new & used options and get the best deals for Valab 23 Step Ladder Type Attenuator Potentiometer 250 K Log Stereo at the best online prices at eBay! Free shipping for many products! Feb 27, 2005 · This is a really interesting comparison. Yes it's one of the Valab jobbies. 4. This attenuator is new and in manufacturer packaging. It has been designed with ladder type format which provide the shortest signal path to achieve Hi-Fidelity sound quality with minimal losses. In the past I have bought them from Valab on ebay, but I can't find that seller presently. Notes: 1. Has anyone had experience with the Valab 23 Step Attenuator and how does the resistor version differ from the SMD version? Apr 10, 2021 · Thanks mcandmar - useful data. 5 dB, or 1. Dec 5, 2010 · I'm looking for some quality stepped attenuator for as cheap as possible. mr_phil If it isn't broken, try harder. Item comes as shown. Customized remote hand set with your logo. Jan 22, 2018 · I used a valab stepped attenuator for my BA-3, a lot cheaper than the goldpoint used by 6L6, and there are several different ebay brands of stepped attenuators that have had good reports here. I need to find a better means of damping the Nutube. I did like my previous digital volume DACT stepped audio attenuators. The active circuitry upstream or downstream from the attenuator with commoned input/output might release their magic smoke. Can someone help, I just finished putting a new stepped attenuator in my Starfish and the minimum volume is WAY to high. Nov 5, 2013 · The advantages of a stepped attenuator are the possibility of better sound because of the parts quality. but maybe they are all Log, but some sells them builded so you'll find what you need, it's the cheap route. Offers on PM or igor0203atgmaildotcom Find many great new & used options and get the best deals for Valab 23 Step Attenuator Potentiometer 50 K Log Stereo at the best online prices at eBay! Free shipping for many products! To go cheap I was also actually thinking to get 2 valab stepped attenuators. Did you miss your Apr 25, 2024 · JFW model 50P-1857 SMA is an example of a TTL controlled 50 Ohm step attenuator. A good friend has offered to sell me a 50K Valab stepped attenuator which I have heard good things about. 000 Hz - 2. Mar 28, 2011 #1 I'm thinking about upgrading a cheap Jun 29, 2016 · So I'm ready to go to a stepped attenuator that doesn't cost a fortune. Indeed, using SMD resistors on a stepped attenuator can be beneficial by reducing the length of the signal path. The longer version takes a bit of introduction. X. Dec 20, 2015 · I have a Valab stepped attenuator, which I also use in the crack and like a lot, on hand to replace it. A key characteristic of a pot is that it The Keysight 355D, dc to 1000 MHz, manual step attenuator provides precision step attenuation in 10 dB steps from 0 to 120 dB. I know the standard pot resistance is 20k - the question I have is does it matter if I change this? I need to add 33k/75k resistors to the pot at the same time too, if this is relevant. It is only buzzing on zero Nov 27, 2013 · there are lots of ways to do it, you can use a Log scale if you want something which makes more sense to your ears, or a linear scale, which is simpler because you just divide the total by the number of steps (also a little cheaper as you don't need to buy lots of different values) for a linear 11 step attenuator which replicates a 10K linear pot, just use 10 x 1K resistors (the first step Feb 1, 2018 · The 'TKD' looks similar to the large 'Alps' stepped pots, etc, to me. Mini-Circuits’ compact programmable attenuators are designed with wide attenuation ranges up to 120 dB and fine step sizes for precise signal level control. This is the most open & revealing volume pot I've sampled. With or without remote control. Model: 4745-69 - Narda-MITEQ Model Information - specifications, performance, datasheets, outline drawings, ECCN status, similar models Dec 11, 2017 · I’m considering having a passive pre made for me, and I’m pondering what sort of attenuator to use. HOME; LATEST NEWS; REVIEWS; CLASSIFIEDS; FORUMS; BRANDS; FIND A STORE; Hi-Fi Show This has been the consensus of audiophiles for many years. Preferably more than 23 positions, with non-metallic resistors (better carbon or wirewound). Go. P. deltaunit pfm Member. Oct 17, 2012 · The maximum output impedance of a 100k attenuator is ~25K. They work OK but the volume control isn't very evenly spaced throughout the turn and I think it may have limited the max volume a little. Mar 31, 2009 · I'm looking at getting a stepped attenuator to use with my Jaycar amp I've just finished building and came across this one on eBay: DACT Type 23 Stepped Jul 19, 2022 · I am looking for a pair of 10k mono stepped attenuators for a subwoofer crossover that I am building. 25 dB, 0. Completely designed and built in-house, our new attenuator offers an incredible improvement, noticeable to all the human senses compared to its predecessor; the 23 step. kit which seems to work just fine, doesn't make any noise when switching which was my main concern. 1 to 11 dB. If you need the best performance you can get the VAA offers unparalleled performance. FOR SALE! Valab Ladder Type 23-Stepped Attenuator Volume Control 100K Log Curve --- 282891268630 In 1995 Goldpoint Level Controls began offering Ladder type stepped attenuators to audiophiles worldwide. Aug 6, 2007 · Very pleased with mine - Just looked at the two I have left - 23 step, Dale RN60D 1% resistors, very smooth action & neat construction. E. The top plate needs a larger hole too. This has absolutely nothing to do with using the top six steps. Therefore, I've decided to build a pair of mono stepped attenuators. 75 dB attenuation range in 0. You need a 10k attenuator for interfacing modern gear. Plenty have replaces the ALPS devices in Naim NACs and a few other stepped attenuators, for example the Valab (current thread in DIY). 5 GHz, average power of 2 watts (1000 watts peak) and is available in 0-50 dB in 1 dB steps. Its not certain the Valab stepped attenuator will stay. It offers maximum power handling of 28 dBm up to 8 GHz and covers a 31. Feb 7, 2011 · I have used that eBay vendor for a set of 640H grid chokes and they arrived well packed and on time. Feb 10, 2011 #1 I have put a 10k log Valab 23-Stepped Attenuator Volume Control 250K --- stereo log type; 2 channels Valab custom built stepped attenuator constituted by DACT like SMD surface mounting disk resistors. 00. First I put a VALAB 20K 23 step attenuator at the output of my lm3886 chipamp board. I've tended to like the 40mm alps stepped attenuators as they have can very tight specs for the step tracking, but can't comment on the TKD ones. I have one at the moment that uses a little Valab attenuator, and it sounds very good indeed. Otherwise, you're out of luck unless you're willing to look at something that splits the difference between the typical potentiometer and a true stepped attenuator. I very much like TKD CP-2500 series. People who make/sell attenuators with SMD resistors like the sound of SMD resistors, but generally speaking there have been a number of complaints that some of the "best" SMD resistors don't sound as good as the cheapest through hole metal films. The values are different from the Alps and Khozmo I posted. The attenuator came with an upside down PCB, and I determined the proper layout using the method described by Paul in another post. The TCJ attenuator A3 uses three 6-position rotary switches to yield a total of 36 positions of attenuation in -1dB (or -2db) resolution. The guy I used, eBay vendor kyc111, seems to have stopped selling them in 2008 or so - look at his feedback as a seller - folks seemed to have really liked them Jul 1, 2014 · - Valab 23 stepped attenuator 100k log. Apr 6, 2010 · The last link you posted looks like some attenuators I have used with some success. Wide range of different types, channels and resistances. There are pots that can come close to the performance of a stepped attenuator, but rarely do they. With the fundamentals outlined, you must consider a few things before we go into more detail. So I decided to see what would happen if I put the attenuator at Jul 29, 2022 · FWIW, I hated stepped attenuators the few times I used them, 24 steps for the standard models simply wasn't enough control. Danish Audio ConnecT manufactures a range of High-End stepped audio attenuators for Hi-Fi, A/V and Pro-Audio, used by DIY Audiophiles and audio equipment manufacturers throughout the world: CT2 uses a resistor network built on non-inductive SMD resistors. Four fundamental attenuator circuit diagrams are given in the figures on the left. Replaced output caps with ClarityCap px series 100uf/250v (these were a challenging fit). 1dB). SHIPPED FROM TN LOCATION WB 1008, 2; E; Q(RJ-7027) - HB Aug 2, 2020 · More dynamic and coherent to my ears than the Valab or Tisbury type of stepped attenuators that stack up resistors at each step rather than switching. The V24 should be fine, but the steps will be coarser. Most step attenuators on the market have a relatively wide variation of attenuation over the specified frequency band; for example, a 3 dB step could be off by as much as l dB so that attenuation is anywhere from 2 to 4 dB. Dec 29, 2010 · Stepped attenuators use a set of fixed value resistors, they are a different beastie from a continuously variable potentiometer. smangus. I'm using the 6 terminals that used to have an Alps RK27 in it. - switchable resistor R1 mod to optimize plate operation voltage for my 12BH7A's - replacement of the LMJE350 by MJE5731 on the 2 small speedball boards. Jun 23, 2021 · There is Ebay, if you check stepped attenuator, you'll bump on those Blue Stepped att. And also a bypass cap to last power supply cap. Cheap switch, cheap resistors, but at least it's a true stepped attenuator unlike the expensive Dact in my preamp which is just a chain of resistors soldered end to end. Yes, as with the volume control, you can use them for either project with no problem. 0 dB steps. With Mini Valab 23 step attenuator musings. Nov 10, 2012 · Has anybody purchased any of the Valab 23 stepped attenuators? I purchased a 20K log Stereo and a 20K log Mono and was surprised to find the stereo and mono attenuators measured differently despite being labeled as log. Thread starter John R; Start date Oct 18, 2010; Prev. Not Elma unless it's already mounted, even only 23 positions. I recently revived an old DAC that uses Sowter transformers for its I/V stage. The Keysight 8494H dc to 18 GHz programmable step attenuator offers exceptional repeatability and reliability. Mar 31, 2011 · Hi All I installed a Valab switched attenuator into my Starfish and really do not like the notchyness of the control, makes my lovely fish feel like a Binatone. I am nearly at the point of Apr 17, 2019 · I'm replacing the standard pot and have two options - a Valab stepped/laddered with a 100k resistance, or an Alps black beauty (second hand) at 20k. My son gave me speedball for Christmas. And I do not have the tools at home to do so. It provides attenuation in 1-dB steps from 0 to 11 dB. Our digital attenuator family offers excellent attenuation and includes off chip ac ground capacitors for near dc operation, making it ideal for an extensive number of RF and IF applications. But in 2003 we ceased building "Ladders" and "Shunts" because we found a way to make I read good things about the Valab stepped attenuators. Am I correct in thinking that a 50K attenuator will lead to higher base volume (and therefore even less usable range) or am I getting it wrong? For instance, attenuators used with coaxial lines would be the unbalanced form while attenuators for use with twisted pair are required to be the balanced form. But I can't for the life of me work out the Hello Adam, There's a good chunk of room around the volume control in the Quickie, I wouldn't imagine that it would present any issues. 75. Why do Mini-Circuits’ ads on TTL controlled step attenuators emphasize the word “precision”? A. Almost everyone has heard of, used or seen a potentiometer (or “pot”) which is the most common of all volume control devices. Would replacing it with a 25k, V24 Goldpoint be worth it? Re: VALab 23 step Attenuator Ground Wiring Reply #1 on: March 02, 2015, 02:49:34 AM With the Crack, you can actually ground both left and right channels in the same together. Jul 27, 2017 · If that is the case you're looking at a incorrectly constructed ladder type attenuator. Could someone double-check my IAG stepped attenuator is designed using a Sowter 9335 -50db attenuator transformer and a Shallco "C" series 27 position switch in a mumetal shielded enclosure. Nov 1, 2012 · The first stepped attenuators i bought were from an Asian seller on Ebay. The downside of this arrangement is the volume is controlled in a series of fixed steps and you may or may not like the step level. with a pot, your signal is getting passed through a pair of resistive tapers that don't always have the right balance. It has attenuation range of 0-95dB by 1dB steps. Our stepped attenuator is made with thin film resistors 0. Since an attenuator circuit consists solely of passive resistor elements, it is both linear and Digital Step Attenuators Analog Devices provides a range of broadband IC digital attenuators that come in low cost, leadless surface mount packages. The PE43704 is a HaRP™ technology-enhanced, high linearity, 7-bit 50Ω RF digital step attenuator (DSA). First Prev 2 of 3 Go to page. The VAA also provides our best light sealing as well as an incredible 8 orders of dynamic range. This device attenuates free-space laser beams (or pulses) continuously without introducing additional energy fluctuations. Nov 11, 2015 · So I'm ready to go to a stepped attenuator that doesn't cost a fortune. I think I will just need choose my own values and solder my own custom stepped potentiometer. Watch out for the 48 step and further developments! Ultimate Performance Feb 10, 2011 · VALAB stepped attenuator for sale. My B4 has a 50k Noble pot and it sounds pretty good to me. Milling (to create space for the nut) could be an option, but it might limit future options / changes. Valab Log Type 23-Stepped Attenuator Volume Control 100K -- mono type; 1 channels Valab custom built stepped attenuator constituted by DACT like SMD surface mounting disk resistors. May 9, 2015 · Best bang for your buck are these Valab 23 Step Ladder Type Attenuator Potentiometer 100K Log Stereo | eBay These have better resistors, but cost a bit more. Mar 2, 2011 · Goldpoint is quite the expert in stepped attentuators, and they believe there is no real benefit to a ladder attenuator when using their thin film SMD resistors in a series attenuator. Simply search "Valab stepped attenuator" in Ebay - Valab being the manufacturer. This design minimizes stray capacitances and inductances, and keeps phase shift to a minimum. Valab 23-Stepped Attenuator Volume Control 250K --- stereo log type; 2 channels Valab custom built stepped attenuator constituted by DACT like SMD surface mounting disk resistors. 30 o’clock to bring the softest and the loudest sounding records equal in level. 000 GHz 50 Ohms Input/Output 0. Find many great new & used options and get the best deals for VALAB 23 Step Attenuator Potentiometer 20K Stereo Log at the best online prices at eBay! Free shipping for many products! PowerXP Compact Motorized Attenuator. The dam1021 raw output goes into a dcb1 unity gain jfet buffer, which in turn goes into a 10k Valab stepped attenuator, the output of which goes into another dcb1 buffer. VALAB 23 STEP Ladder Type Attenuator Potentiometer 100K Log Stereo - $38. Using a switch and numerous resistor networks at each step, you can create a stepped attenuator to control the volume of your Hi-Fi. I purchased an extender to situate the switch and pot close to the rear to allow shorter wires. Mar 31, 2009 · I'm looking at getting a stepped attenuator to use with my Jaycar amp I've just finished building and came across this one on eBay: DACT Type 23 Stepped Attenuator Potentiometer 50K 2a3 - eBay (item 270361166816 end time Apr-18-09 12:55:45 PDT) Has anyone had any experience with attenuators Jul 28, 2014 · Fleawatt DIY TPA3116D2 Black and Gold Valab for sale. Khozmo stepped attenuators are best sounding precision volume controls available. Most are sold as single channel, be sure as to which you are looking at. Jun 8, 2023 · For instance, a rotary step attenuator with a 1 to 10 dB step attenuator followed by a 0. Ahh those eBay jobbies. Photos are best representation of item offered. The builder There is some confusion about what is needed, or appropriate for a replacement of the Crack pot. And in 1998 we added the Shunt and Series type stepped attenuators. Jan 31, 2013 · Hi guys! I need a good stepper attenuator. . Furthermore, additional rotary step attenuators can be added to increase the attenuation range further. Attenuator sections are inserted and removed by cam-actuated microswitches which keep lead lengths short. If my math is right I then get following values: 10K log attenuator with a 90K series resistor = -20dB 20K log attenuator with a 80K series resistor = -14dB 50K log attenuator with a 50K series resistor = -6dB Alonzo Gameroom:>Mainline to HD820, SR45 to Pipette >BeePree Kaiju & SII to Altec 19 knockoffs Office:>BH Stat amp to Koss 95x, T20 SET to JBL 4309s Mar 2, 2011 · Previously tried Valab stepped attenuator but didn't get on with it, I think I will keep this . The right small speedball board need to be redrilled 5mm away. Attenuator can be used for higher power applications with addition of appropriately sized fixed attenuator 2. Very nice build :), how's it sound? disarmamant. 1 dB decimal places from 1. I put my volume to 0 when I first plugged it in after all this stuff and there is a loud buzz, and if I turn volume up only one step, it is quiet. As with all my amps, teflon coated solid core copper is used for all the signal wiring. Great job! But isn't another benefit of a stepped attenuator more accurate and consistent tracking? With really bad potted attenuators, I can often hear some odd things (channel imbalances and "sound" or a better way to say it is I can hear the pot working) across the spectrum of the volume level, especially at low volumes. Someday soon, I'll put it all back together. The hole for the stabilization peg (or whatever it should be called) needs to be moved a couple mm away from the shaft to fit properly. The Valab is the same but I feel The recommended attenuator for Crack is a 100k stereo log ladder type stepped attenuator. With ladder type on a 4-pole switch for 2-channel stereo construction, when done right, all the unused resistors dangle off GND, and signals go to/from nowhere but the intended 2 resistors only, likely resulting a more compact physical path. :D EU preferable. Feb 13, 2016 · I think that what is going on with the Valab and the stepped attenuators that I received is that the steps are chosen for a value that reflects a linear change in dB when used as an attenuator, rather than a strictly logarithmic change in resistance. Alonzo Gameroom:>Mainline to HD820, SR45 to Pipette >BeePree Kaiju & SII to Altec 19 knockoffs Office:>BH Stat amp to Koss 95x, T20 SET to JBL 4309s Dec 3, 2021 · Volume control mounting The front panel of the "2515" chassis is about 8mm thick, the threads on the Valab stepped attenuator are barely 10mm. The ePot. How can I fix this? Should I reduce the basic gain of the 'fish or add a resistor somewhere The ePot. The complete package – an optically encoded electromagnetic drive with fast closure and incredible step resolution. View attachment 328283 Valab 23 Step Ladder Type Attenuator Potentiometer 50K Log Stereo | eBay I'd say that right there could give the Blue Alps a run for best-bang-for-buck! Oct 17, 2013 · Jump to content. Very slight increase in volume over the first 21 steps then a huge jump at 22 and nothing at 23. Hello! I installed 100uf film output caps to my crack and bypass caps to them. Not elegant but cheap alternative The 23-step Valab/21-step 'DACT type' attenuators have a great reputation on DIYAudio. Nov 6, 2009 · Valab stepped attenuator for B1 Buffer VALAB 23 Step Attenuator Potentiometer 20K Stereo Log As have a few other people on this thread, I bought the above attenuator for my about to be constructed B1, but then decided to to go the twin mono route and bought a single mono version of the above: Valab 23 Step Attenuator Potentiometer 20K Log Mono I bought the mono attenuator planning to use it May 9, 2013 · With a variable-gain circuit there is no input attenuator, as is normally found in a preamplifier. One for each board so controlling left and right channel separately. Thread starter mr_phil; Start date Feb 10, 2011; M. The PowerXP Compact motorized attenuator is a smaller, faster, and higher-performance version of the renowned Watt Pilot motorized attenuator. Hi, newbie here, just built the crack with the valab stepped attenuator, all went well, passed all the voltage and resistance checks. Handmade, one of a kind Class D amplifier. Replaced volume control with Valab stepped attenuator. Sep 26, 2023 · Not sure if a mono-attenuator would be a good idea, even if you don't care for stereo. The signal only goes through 2 resistors. Using that 20:1 ratio you need a power amp with Rin >=500k. 24 Positions Stepped Attenuator Knightstereophonics proudly designed and manufactured the surface mount device (SMD) type 24 positions stepped attenuators. A really great product which did its best to mimick the DACT. Oct 17, 2017 · Wow this thing really is microphonic; my clunky Valab stepped attenuator causes whistles through the right speaker. Please login or register. Has anyone had experience with the Valab 23 Step Attenuator and how does the resistor version differ from the SMD version? EIZZ - These look really well designed and manufactured and the workmanship impresses me but do they perform as well as they look? Valab Log Type 23-Stepped Attenuator Volume Control 100K -- mono type; 1 channels Valab custom built stepped attenuator constituted by DACT like SMD surface mounting disk resistors. 24-Step Ladder-Type Attenuator - 10K Log – 2 Channel . Only two resistors in the signal path. I have just tried a chinese audiometric. I very much like my 256-step relay-based attenuator. Why we use such appro Is that one of them valab stepped attenuators? Thanks. Equipped with a VALAB brand stepped attenuator. I do have a diy passive pre using a valab stepped attenuator but it's only got one input and I need more than that, plus I kinda like not having to switch the 303 on at the plug (more ease of use for the rest of family as much as anything else). RF & Microwave Products › Attenuators ZFAT-51020B 35 dB Digital Step Attenuator, 10 - 1000 MHz, 50Ω Connector Type: SMA Generic photo used for illustration purposes only. May 13, 2015 · Q. Dec 28, 2010 · Hi Chaps Hope you all had a great Christmas and had some relaxing time. Plugged it in to the system connected my phones and turned it up one notch from what I presume was the minimum position only to be blasted at maximum Volume! As far as I can see, I've wired it up correctly. Hi guys, I have a question re. A perfect companion for any high end audio device. They come in 10K, 20K, 50K, 100K. Please if Valab 23-Stepped Attenuator Volume Control 250K --- stereo log type; 2 channels Valab custom built stepped attenuator constituted by DACT like SMD surface mounting disk resistors. Valab Log type 23-Stepped Attenuator Volume Control 50K --- mono type; 1 channels Valab custom built stepped attenuator constituted by DACT like SMD surface mounting disk resistors. 1 to 1 dB step attenuator could be used to reach any value to 0. 1; 2; 3; Next. FOR SALE! Valab Ladder Type 23-Stepped Attenuator Volume Control 100K Log Curve --- stereo/dual 123230289801 Stepped attenuators offer a better soundstage, clarity, and detail than potentiometers. For some reason I'm getting almost no sound even when I twist the knob up to max, and there's a lot of hiss. The better the tolerance of the resistors used, the better the soundstage is. Good luck getting anything like that out of a potentiometer! Find many great new & used options and get the best deals for Valab 23 Step Ladder Type Attenuator Potentiometer 10 K Log Stereo at the best online prices at eBay! Free shipping for many products! For reference, the Valab ladder style attenuator will fit, but will touch the wood. They are pretty much the default (if not only) stepped attenuator recommendation on a budget. My only concern is that I currently struggle to get past 25% on the existing (stock) 100K pot. tdxdbajtoiqrfyxrqfwqpwjeddycoykemwqlyjvaxtsodduchn
Valab stepped attenuator. You need a 10k attenuator for interfacing modern gear.