[hmscott]

I didn't realize it took 2 C3G's to 1 6SN7 socket, here is the adapter I found - I've also asked them if 2 C3M's would work in this adapter:

1pc Gold plated Dual C3G Instead 6SN7 6N8P B65 tube converter adapter
https://www.ebay.com/itm/201983764783


@gibosi - Is that how your amp in the photo with the 2 - C3G's works - either those 2 sockets are filled with C3G's or the single empty socket hosts the 6SN7? Can that amp use C3M's as well?

Update: @JazzVinyl reminded me that the C3M uses 20V heater voltage - that must be why there are so many C3M's up for sale vs C3G's.

 

[JazzVinyl]

I didn't realize it took 2 C3G's to 1 6SN7 socket, here is the adapter I found - I've also asked them if 2 C3M's would work in this adapter:

1pc Gold plated Dual C3G Instead 6SN7 6N8P B65 tube converter adapter
https://www.ebay.com/itm/201983764783


@gibosi - Is that how your amp in the photo with the 2 - C3G's works - either those 2 sockets are filled with C3G's or the single empty socket hosts the 6SN7? Can that amp use C3M's as well?

C3M uses 20 volts to heat the heater...

https://frank.pocnet.net/sheets/009/c/C3m.pdf

 

[hmscott]

C3M uses 20 volts to heat the heater...

https://frank.pocnet.net/sheets/009/c/C3m.pdf

Ah, that's right, I remember reading that, thanks

That must be why there are so many 20V Heater C3M's up for sale vs. 6.3V heater C3G's in Germany.
https://frank.pocnet.net/sheetsC.html
https://frank.pocnet.net/sheets/128/c/C3g.pdf - Telefunken
https://frank.pocnet.net/sheets/062/c/C3g.pdf - Lorenz
https://frank.pocnet.net/sheets/190/c/C3g.pdf - Siemans

 

[JazzVinyl]

I personally never heard the C3g sound better than they did in the Little Dot MK IV - a 'metallic ring' to the highs in other amps.

 

[gibosi]

Is that how your amp in the photo with the 2 - C3G's works - either those 2 sockets are filled with C3G's or the single empty socket hosts the 6SN7? Can that amp use C3M's as well?

Yes, I can run either two C3g or one 6SN7. Plus there's a switch in the back to allow the use of 12SN7 and 25SN7.

And in the C3g sockets, with adapters, I can also run EL3N, EL41 and other similar pentodes

 

[hmscott]

Yes, I can run either two C3g or one 6SN7. Plus there's a switch in the back to allow the use of 12SN7 and 25SN7.

And in the C3g sockets, with adapters, I can also run EL3N, EL41 and other similar pentodes

Wow, that is really flexible, who makes that amp? Model? URL to order?

25SN7, I've never even heard of that variation.

 

[hmscott]

I personally never heard the C3g sound better than they did in the Little Dot MK IV - a 'metallic ring' to the highs in other amps.

What adapter(s) did you use for the C3G in the Little Dot MK IV, or other amps?

 

[gibosi]

I personally never heard the C3g sound better than they did in the Little Dot MK IV - a 'metallic ring' to the highs in other amps.

This is likely because the correct bias for a C3g is pretty close to that of a 6AK5. The C3g sounded great in my LD 1+ too, and this was the reason I asked Glenn to add C3g sockets to my OTL.

 

[gibosi]

Wow, that is really flexible, who makes that amp? Model? URL to order?

25SN7, I've never even heard of that variation.

It was custom made by Glenn. So a custom Glenn OTL. However, I believe that he has retired from building amps....

Ken Rad and RCA made the 252N7, labeled as a 1633. And Brimar made one too, labeled as a 13D1. I don't know of any others.

 

[musicman59]

Here are the Woo adapters C3G to 6SN7. Notice that for some reason the adapters are specific to each channel.

These are the ones I used in my WA5-LE v1 when I had it.

 

[JazzVinyl]

What adapter(s) did you use for the C3G in the Little Dot MK IV, or other amps?

There is one made for the LD MK IV driver->C3g

By the same person you linked to for the 6sn7 to C3g….

 

[Bonddam]

I bought mine in classifieds. Adapters I have are for WA5. The tube is different pantoid not dual triode so socket on the amp is only using one side with c3g.

 

[JazzVinyl]

I bought mine in classifieds. Adapters I have are for WA5. The tube is different pantoid not dual triode so socket on the amp is only using one side with c3g.

Think this is the one for the Little Dot MKIV

https://www.ebay.com/itm/201366974329

Need 2 of them in the MK IV

 

[Bonddam]

So far love the c3g over the 6sn7 with 300B tube amp. I'm hoping Jack Wu will make me Woo adapters. I'm currently using adapters for left and right but the Woo ones are way better quality. The c3g does so much to the sound it quiets the noise floor and brings out transparency not there before and it sounds so effortless. It makes my 6sn7 Ken Rad $400 CRK VT231 sound alright. I purchased more c3g to keep on hand. I still like my 6sn7 collection but maybe 300B like the c3g better.

 

[Lickumms]

I am looking for a new pair of 6SN7 style tubes for my TorAudio Balanced AMP. Currently it uses a matched pair of 6N8S but one of the tubes went bad so there is a lot of noise coming from the amp.

I am looking at getting one of the PSVANE Globe style 6SN7 pairs to replace the stock russian tubes. Like the 6SN7-SE(Black), CV181-SE, COSSOR 6SN7, 6SN7-BE.
The other option I was looking into is the Linlai E-6SN7.

Has anyone tried any of these tubes?