[Onik]

Are you isolating the (V+) & (V-) power supply pins for each of the four op-amp sockets?
If not, where are you breaking the +18V and -18V supply rails, and installing the Zener Diodes, to lower the op-amp supply voltages?

This is what I'm going to do:

Edit: I changed the value to 2V2 because the V6 might perform better with a bit higher voltage.

 

[CADCAM]

Anyone have any experience with these two tubes?
https://www.ebay.ca/itm/6N3P-2C51-3...965875?hash=item3b0a2065f3:g:EYgAAOSwPhdU27jo
https://www.ebay.ca/itm/2x-6N3P-DR-...209928?hash=item2637388bc8:g:xoQAAOSwDdxed6Bs

What is the differences between them?

I have both, the first link 1968 6N3P is an excellent tube and I've had it in my P20 for quite a while but just swapped it out with a matched pair of 1981 6N3P that also sound fantastic IMHO. I have yet to try the 6N3P-DR's but as soon as I do I'll post something. I like to leave a tube in for a bit to really get an idea of its sound sig.
The 6N3P I received from that same seller had one marked 68 and the other 69 but they sounded great so I'm fine with that. It's more important they are matched electrically. I also have purchased from tubes_old70 as well and George has some excellent tubes that he tightly matches. 6N3P's are relatively cheap so I'd get a few matched pairs and see\hear which you like best.

 

[Guidostrunk]

If you guys like the 6n3p. The triple mica from the foton plant are the best 5670/396a tube in that family of tubes.
These are from 82. But if you keep searching you can find some from the mid to late 50's
https://www.ebay.com/itm/6N3P-I-6N3...-/224148145994?_trksid=p2349624.m46890.l49292

Next in line would be the triple mica from the Reflektor plant.
https://www.ebay.com/itm/TUBE-6N3P-...-/293109588843?_trksid=p2349624.m46890.l49292

 

[dougms3]

Just received my order from tubesandsound

Surprised it came so fast considering its shipping from Russia. Ordered on Feb 21 and received it today.

Can anyone explain the writing on the tubes here? I'd just like to familiarize myself with whats going on so I can learn to tube properly

Just

 

[Guidostrunk]

Test results. Look really strong/NOS testing.

 

[smashey]

Bugger! You’ve got me at it now. I only ordered the P20 for fun and now I’m ordering Russian hand me downs. I’m worried where this will end.

 

[Andrea Vassalli]

Guys from today I am with you ....
Tomorrow the balanced cable for Amiron arrives and then I am waiting to receive the 4.4 to 2 Xlr cable from China to connect to my IFI Signature
https://imgur.com/96Js8mp
https://imgur.com/UNtIuDF

 

[CADCAM]

Here's my set up...well one of them.

 

[Cat Music]

Guys from today I am with you ....
Tomorrow the balanced cable for Amiron arrives and then I am waiting to receive the 4.4 to 2 Xlr cable from China to connect to my IFI Signature
https://imgur.com/96Js8mp
https://imgur.com/UNtIuDF

Hello, could you share the link where you bought the 4.4 to XLR cable, it may be useful to me, I am thinking of buying a cable with those characteristics

 

[Guidostrunk]

I've had this one in my watch list lol.
https://www.ebay.com/itm/4-4mm-to-D...-/324346533805?_trksid=p2349624.m46890.l49292

 

[Andrea Vassalli]

Hello, could you share the link where you bought the 4.4 to XLR cable, it may be useful to me, I am thinking of buying a cable with those characteristics

Hi, I got the cable from an Aliexpress seller, I preferred the measure of 0.50 meters
https://it.aliexpress.com/item/4000062254037.html?spm=a2g0s.9042311.0.0.38054c4dPKP4Zy

 

[arielext]

I just got some new 6Н3П-ЕВ tubes I found on fleabay. Thought I bought 1 set but instead got 4 tubes, for less then €9 (not matched but still all 4 are good), insane price for such silent and quality tubes!
With the new power supply I have the feeling the amp has cleaner bass and steps up to the next level.

Next level is still nothing compared to the big amps but it's only a fraction of the cost

 

[Jonmakauu]

I am planning to replace the caps on these with better ones, can anyone please check the values for me? Thanks

 

[Guidostrunk]

I am planning to replace the caps on these with better ones, can anyone please check the values for me? Thanks

Send @ksorota a pm.

 

[dougms3]

Should receive my P20 back from Keith on Friday.

I am very excite !!