I have been eyeing up some of these pots on that site:
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... TQ:US:1123
and was curious if the attenuation curve for the pot would be too steep or anything like that. I use a 100k pot in my preamp now and use about half of the travel for regular listening levels currently, but most amps I have are variable input, as I am running efficient speakers and only have bigger power amps (200W and 380W per channel @ 8 ohms). I plan on running this before my active crossover. Thanks
It starts at -60Db, and the steps are roughly -53, -46, -40, -36, -31, and so on... the increments become finer towards the end... is this initial start too steep?
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... TQ:US:1123
and was curious if the attenuation curve for the pot would be too steep or anything like that. I use a 100k pot in my preamp now and use about half of the travel for regular listening levels currently, but most amps I have are variable input, as I am running efficient speakers and only have bigger power amps (200W and 380W per channel @ 8 ohms). I plan on running this before my active crossover. Thanks
It starts at -60Db, and the steps are roughly -53, -46, -40, -36, -31, and so on... the increments become finer towards the end... is this initial start too steep?
The increments show the pot to be logarithmic, which suits the human ear as our perception of sound levels is the same.
3dB rise is twice as much power, so -60dB would represent quiet and 0dB full volume.
3dB rise is twice as much power, so -60dB would represent quiet and 0dB full volume.
Apologies... Here it is:
Dact Type 21 Stepped Attenuator Potentiometer 100K 2A3 | eBay
The curve is very different from one end to another, as it appeals the steps become smaller increments. Is there a way to wire it in reverse?
He provided a graph but I am unable to save and attach.
Dact Type 21 Stepped Attenuator Potentiometer 100K 2A3 | eBay
The curve is very different from one end to another, as it appeals the steps become smaller increments. Is there a way to wire it in reverse?
He provided a graph but I am unable to save and attach.
Hi,
Wiring in reverse is easy, but totally useless for a log law.
No control at low volumes, and next to no effect at high volumes.
rgds, sreten.
Wiring in reverse is easy, but totally useless for a log law.
No control at low volumes, and next to no effect at high volumes.
rgds, sreten.
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To me this looks like a standard pot with mechanical click-stops, not individual resistor elements between stops.
The return policy, sort off, says it all! E
The return policy, sort off, says it all! E
An externally hosted image should be here but it was not working when we last tested it.
Hi, It clearly isn't a standard pot with clickstops, rgds, sreten.
Hmmm. So I am looking for an affordable stepped attenuator to replace my volume pot on my preamp. I apologize for using the wrong terminology. Is there another suggestion you could make?
The ALPS Blue Velvet, series RK27, is not a stepped attenuator, but of high quality. Search this forum, there are several discussions here. E
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I have no reason to suspect that it isn't what it states it is. If it turns out to be a scam you are covered by PayPal anyway.
I tried the Blue Velvet against a Ladder Attenuator. Both were good but each had an edge over the other.
1. The ALPS pot was less fluid than the ladder attenuator and didn't have perfect matching between the two sections. On the other hand the volume was infinitely variable - ie no 0.5dB step limitation.
2. The ladder attenuator was definitely more transparent sounding and the two sections were perfectly matched. However you cannot gat away from the fact that there always has to be a limit on the finite adjustment that can be made.
If you can live with the fact that you would like volume setting 21 1/2 but can't have it then the ladder attenuator won over the sonic stakes for me.
The one the OP is showing E-Bay is very small, ideal for replacing a standard pot. Most ladder attenuators are a little or considerably larger.
I tried the Blue Velvet against a Ladder Attenuator. Both were good but each had an edge over the other.
1. The ALPS pot was less fluid than the ladder attenuator and didn't have perfect matching between the two sections. On the other hand the volume was infinitely variable - ie no 0.5dB step limitation.
2. The ladder attenuator was definitely more transparent sounding and the two sections were perfectly matched. However you cannot gat away from the fact that there always has to be a limit on the finite adjustment that can be made.
If you can live with the fact that you would like volume setting 21 1/2 but can't have it then the ladder attenuator won over the sonic stakes for me.
The one the OP is showing E-Bay is very small, ideal for replacing a standard pot. Most ladder attenuators are a little or considerably larger.
The Cheap Chinee 'stepped attenuator' that isn't one, has long been reported as Crap.
The Ubiquitous on Ebay; Alps 'Blue' pot is likely a Chinese Fake.. Mine was.🙂
Want a stepped att? Buy a Goldpoint, but not surprisingly a wee bit more $$ than that cheapy or the Fake Alps Blue Velvets.
The Ubiquitous on Ebay; Alps 'Blue' pot is likely a Chinese Fake.. Mine was.🙂
Want a stepped att? Buy a Goldpoint, but not surprisingly a wee bit more $$ than that cheapy or the Fake Alps Blue Velvets.
The stereo Blue sells at Mouser for about US$13, E$16 at Conrad, I do not believe that those are fakes!
Alps used to make steppedd attenuators. I have 2-22pos. stereo pots left over from my Toshiba repair days. Unfortunately only a Toshiba parts# on them. E
Alps used to make steppedd attenuators. I have 2-22pos. stereo pots left over from my Toshiba repair days. Unfortunately only a Toshiba parts# on them. E
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