Potentiometer Overview - Alps, Penny+Giles, TKD and Vishay and more, what's your fav?

[lanchile]

Originally Posted by DCPreamp

I'm really impressed with the Goldpoint attenuator and input selector I used in my last preamp. A little pricey, but very well made and add nothing to the sound.

Paul

Very nice unit for sure.

[wuwhere]

I will be purchasing a TKD vol pot, 100kohms, is the 2CP-2508 better than the 2CP-2511? Thanks.

[HP8903B]

What do you guys think of this stepped attenuator on ebay:

33 Step 100K Volume Control DACT ELMA TKD 2A3 300B tube - eBay (item 150539240706 end time Jan-01-11 20:17:34 PST)

Has anyone tried this unit?
It look a lot like the Seiden unit.

[sendler]

Originally Posted by manp111

What do you guys think of this stepped attenuator on ebay:

33 Step 100K Volume Control DACT ELMA TKD 2A3 300B tube - eBay (item 150539240706 end time Jan-01-11 20:17:34 PST)

Has anyone tried this unit?
It look a lot like the Seiden unit.

They say it is a 100k ladder type but it only has two decks and requires a fixed 20k series resistor? I think it is a 20k switched shunt type which is only suitable to precede an active stage of 100k input impedance or higher with minimal cable in between. 1.2db per step is too close and only gives a total of 40db of range. I have 2db per step attenuators and if I am going to get up to change the volume, I usually end up changing in 4db increments unless I am doing level matched comparisons between components.

[HP8903B]

From what I understand, a 33 step ladder type would have 66 resistors PER channel right?

[HP8903B]

I think you are right that it is shunt type.

However, the resistors appear to be soldered in series.

[sendler]

Originally Posted by manp111

I think you are right that it is shunt type.

However, the resistors appear to be soldered in series.

It could be a series type but then I don't understand why they would send two pairs of 20k resistors.

[tylervanbach]

Hello, I was wondering if a rotary select for input switching could also function as an I/O for say a phono preamp. Like, 3 inputs cd/aux/phono but the phono also connects the mains to the phono preamp? Can this be done with a three deck rotary?

[tiefbassuebertr]

nwe rotary sw. from Shallco - discuss
New Shallco Switches

[tiefbassuebertr]

Originally Posted by glen65

Thanks for the reply,

Its definitely a balance control because that's where I pulled it from.
You're correct it is an Alps control. I'm looking for something to replace
it because it's open. Ive seen some other controls that could work physically
but the resistance is only 10K. Its being used in a receiver where the preamp
consists of a 4558 op amp. If I cant find something with a high enough
resistance I guess my only other alternative would be to find out if the
circuit could be reconfigured to use something with a different resistance
value.

Please let me know the model and brand of the amplifier, where this ALPS balance potentiometer is in use. I am interesting on the circuit topology, bacause I have never seen before for balance adjust such a pot with four instead commonly three pins.