Anyone has the Digi-Key Part Number for both switches (on-off and selector)? I am confused which one I should pick in Digi-key. Thanks.
Where can I source the cosmos from here in the US? I called the manufacturer rep in the US this morning and unfortunately wasn't in the market for 20 of them.
You can try reduce the output signal to ground. Resistor
Say 330k.
Make it say 150k. That would reduce gain
Without having to change a pot
Papa did mention..
Say 330k.
Make it say 150k. That would reduce gain
Without having to change a pot
Papa did mention..
Guess Ebay... search function is your friend, I posted here some while ago where I got it from...
Claude
Claude
Search DPDT switch. Digikey or eBay. Used it on my power on/off. Post #4688.
Those will work fine. Just don’t expect anything happening if you stop in the middle position... 🙂
Reduction of output level on the preamp .
I have understood that you do not want to change the gain of the preamp as it will definitely change the sound quality which has been carefully designed by Nelson Pass .
However he suggested that I can may be reduce the output level using resistors .
Since I have no idea of how to implement that , does some knowledgeable forum member could help ?
I have understood that you do not want to change the gain of the preamp as it will definitely change the sound quality which has been carefully designed by Nelson Pass .
However he suggested that I can may be reduce the output level using resistors .
Since I have no idea of how to implement that , does some knowledgeable forum member could help ?
Check out this link:
Pre-Attenuation
Tips on how to get more usable range out of your volume control.
Thank’s for this very useful information It does answer my question .
I will try that as it is fairly easy to implement .
Any idea on the type of exotic resistors for the best sound quality ?
I will try that as it is fairly easy to implement .
Any idea on the type of exotic resistors for the best sound quality ?
I built the DIY Audio Store kit as shipped but swapped for a different attenuator. I would not describe the results as bright. It sounds full bodied to me. I am wondering if others find the bright sounding.
I will never describe this nice preamp as bright sounding . The medium is really , really nice .
Yep ..takman red carbon works super for me. If possible match it within 1%
Can also try cardas cu litz .it works great for this preamp . If u like glow and bloom
Actually I think with metal.film it won't be issue ..just turn the dial to flavour..it can soften the treble and provide warmth
Can also try cardas cu litz .it works great for this preamp . If u like glow and bloom
Actually I think with metal.film it won't be issue ..just turn the dial to flavour..it can soften the treble and provide warmth
Last edited:
For my case some is depending on very low Q Duelund speakers. And total control from the high feedback power amp. Also no resonances from the room. Now the Korg/Aleph 1.7 and the rest off the setup fit perfect together.
Anyway ...we had fun with b1 Korg
Compared with Denon old school .complicated jfet design about 50jfets which sounds legendary . B1k no issue of doing just as good . Actually b1k is better.
Compared with papa old adcom preamp. Also no problem. Actually more similarity.
The thing is we can turn trimpot to match the sound . Extremely fun. But friend say blah blah why no use Toshiba ..I say papa and wiz assistant say almost same they no believe . Furthermore cheap and have fun .So just shrug
So ....morale of story ..simple design do sounds great ! Papa Nelson is wise indeed. I'm schooled
Compared with Denon old school .complicated jfet design about 50jfets which sounds legendary . B1k no issue of doing just as good . Actually b1k is better.
Compared with papa old adcom preamp. Also no problem. Actually more similarity.
The thing is we can turn trimpot to match the sound . Extremely fun. But friend say blah blah why no use Toshiba ..I say papa and wiz assistant say almost same they no believe . Furthermore cheap and have fun .So just shrug
So ....morale of story ..simple design do sounds great ! Papa Nelson is wise indeed. I'm schooled
I believe u ...sometimes it sounds almost the same at some system ..but can sound mediocre and show differences with very quiet and transparent gear or different amplifier or speaker even ..
No sweat . I experienced it many times sound great at one venue and sounds mediocre at some other place . Just do whatever we need to do .
I always prefer carbon and leaded solder ..forgiving and nice tone so ....it's clearly just a choice . And my friend actually did a b1+jfet boz with metal films ..it actually is equally nice with the carbon b1 Korg at that venue ..too lazy to figure why lol
Ordered Nutube，JFet and PCB is time, Going to reuse old projectsleftover like tentlabs remote 64 steps volume control and selector and TPA shunt PSU, the case left after disassembled a dual mono headphone amplifier.
Hopefully this one will be Neat and high quality combo with minimal extra cost with what I have right now, any suggestions and advise?
Volume control
Hopefully this one will be Neat and high quality combo with minimal extra cost with what I have right now, any suggestions and advise?
Volume control
Last edited: