Hello, I have develop this pcb for volume control,I do have severall modules and parts from National Semicondutor
but this have been developed mainly for the ones with LM3875 which you can check here:
https://www.ebay.de/itm/325923530044
Here I am using a RK27 ALPS dual gang pot,but I am looking for a better price point using other pot, and
I would like to know what forum users do recomend?
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What is the purpose of this board? Usually the pot is a separate unit cabled to whatever board it needs interfacing with.
The main purpose is for the pot don't stay free hanging, also the pins on this pot are to be soldered on pcb,
I placed a relay which is used to bypass pot in case you want a direct input to the amplifier.
By the way I am looking for other options of pots to be soldered on pcb.
Regards
I placed a relay which is used to bypass pot in case you want a direct input to the amplifier.
By the way I am looking for other options of pots to be soldered on pcb.
Regards
TKD pots are a medium cost option but are difficult to find. Michael Percy used to carry them but it appears he is closing out his stock.
IMO RK27 is the only high quality option at this price level.
Not consistent with your apparent business model ( forgive me if I am incorrect), but John Broskie of TubeCAD offers PCBs for switched attenuators that also effectively include a balance function. Here is One example. For many, though, the form factor is not acceptable. PM
IMO RK27 is the only high quality option at this price level.
Not consistent with your apparent business model ( forgive me if I am incorrect), but John Broskie of TubeCAD offers PCBs for switched attenuators that also effectively include a balance function. Here is One example. For many, though, the form factor is not acceptable. PM
@brunomiguel TKD pots are the best option, very decent sound
https://www.hificollective.co.uk/potentiometers/tkd-potentiometer.html
https://www.hificollective.co.uk/potentiometers/tkd-2cp-601s-potentiometer.html
Here are gerbers for PCB to mount both types including 4 channel
https://www.hificollective.co.uk/potentiometers/tkd-potentiometer.html
https://www.hificollective.co.uk/potentiometers/tkd-2cp-601s-potentiometer.html
Here are gerbers for PCB to mount both types including 4 channel
Sorry but i don't think that 110€ is a medium cost option😱
PS just seen another type stereo 10K is 52€ but u.k isn't European union partner any more.
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Compared to the Goldpoint, the TKD is a medium cost option. When carried by Michael Percy in US, they were around $85.
I think you had two low cost alternatives suggested to you. I would have suggested the low cost Alps but I was mistaken in thinking you wanted something comparable to the RK27 series. The Bourns looks good, inasmuch as you can choose th conductive plastic version. I remember reading that cermet may have better overall audio signal quality, but noise during adjustment is usually unacceptable (according to the author; I have no experience).
I think you had two low cost alternatives suggested to you. I would have suggested the low cost Alps but I was mistaken in thinking you wanted something comparable to the RK27 series. The Bourns looks good, inasmuch as you can choose th conductive plastic version. I remember reading that cermet may have better overall audio signal quality, but noise during adjustment is usually unacceptable (according to the author; I have no experience).
My point is "business model",I am decided to use and create the best audio electronics but also got afordable solutions, I am tired of fake parts,or poor designed electronics. I don't know if you check my link but in my listings I do offer amp modules some at lower price like LM4780 or LM3875 and I do offer
some more expensive amp modules with Thoshiba fets and like this I want to develop pcb for por at power price like the sugested bourns a médium price the RK27 and maybe on the future an high end option, here I requested for a lower price point, example I would consider using a goldpoint pot for an high end amp module like the Lme49830 with thoshiba fets but with the modules I do offer like the LM4766 or LM4781 probably not.
Many thanks, what do you mean by IMO RK27?
Thanks for your sugestion that would be for the high end also, when you say decent sound you mean that the wipers run smooth on the tape resistor and don't scratch or bounce creating harsh volume changes?
IMO means “in my opinion” which is just that, an opinion, not any assertion of fact.
I wish you well in your endeavor; it is always an issue to balance affordability against quality. I also know what you mean by fake parts: a real issue for decades.
There is another cheaper pot which is actually pretty decent: Alpha 2122G (also available from Song Huei). Hard to source, was involved in a group buy for these on head-case (4 channel 2142G) for Dynalo Minis. Not sure where they were sourced from, I think directly from the manufacturer (Song Huei). I don't have any complaints regarding the ones I've used.
https://alphapotentiometers.net/html/21mm_rot_pot.html
Also, another source for TKD, which seems to have the 2ch 2CP2500 for $75: http://www.diyaudio.vn/dad_attenuators.htm
I've never done business with them, so can't comment on that.
https://alphapotentiometers.net/html/21mm_rot_pot.html
Also, another source for TKD, which seems to have the 2ch 2CP2500 for $75: http://www.diyaudio.vn/dad_attenuators.htm
I've never done business with them, so can't comment on that.
Hi Bruno, yes very smooth operation. Both models in my experience are much better in all departments compared to Alps. The expensive 2511 series are in fact a replacement for the legendary Noble pots, however the 2cp-601 are good enough and IMO better than Alps.
Have you considered the Muses electronic attenuator by Meldano? I think a stereo unit will cost around $70 to build then a simple 15V supply is needed. The best I have heard.
Hello many thanks, Hificollective does supply that brand but that serie don't do you know where to find them?
I haven't considered that I pretend to offer diy kits that one for sure is not for newbies, I do have in house PGA2310 I think should be similar to that, but for now I am looking to develop a pcb for pot "passive" like the one I posted but suited with a lower cost pot.
Btw TKD exist in Hificollective many thanks
Regards
Do you have sound experience to compare this pot with Alps RK27?
Compering these described different pots with Muses 72320 chip volume solution then what would Muses 72320 offer more in sound/ hi-fidelity?