[gibosi]

The Chatham 6as7g’s are my fave! Does any one have any recommendations for the type of driver and rectifier I should use for good voltage synergy?

In my experience almost any driver and rectifier combination sounds good with the Chathams.

 

[BunnyNamedCraig]

In my experience almost any driver and rectifier combination sounds good with the Chathams.

Well that’s good to know! I didn’t know if a certain type was better then others… guess I’ll keep playing around more then

 

[robo24]

My well traveled Glenn is back home and better than ever. Thanks @L0rdGwyn for the repair!

NY->OH->NY->HI->OH->HI

Melz 1578, Thompson 6080, Raytheon 5U4G

 

[Monsterzero]

Glad you got it sorted out, Rob

 

[kvtaco17]

My OTL is still kicking after the last 11 years of ownership. My 5998's however are getting noisy with age... I tested them last night and they're still "good" but in the 60's instead of the 80's when I got them... I really don't want to fund replacing them so I guess back to rolling... Any suggestions as a replacement?

 

[gibosi]

My well traveled Glenn is back home and better than ever. Thanks @L0rdGwyn for the repair!

NY->OH->NY->HI->OH->HI

Melz 1578, Thompson 6080, Raytheon 5U4G

I suggest that you keep an eye on that 5U4G. In the GOTL, with a pair of 6080s or 6AS7Gs, it's maxed out. It can provide at most 225mA whereas the amp wants about 250mA or more.

 

[UntilThen]

Speaking to @rosgr63 the other day in the ECC31/ECC32 thread, he said he still have the GOTL and COTL Super 10.

 

[UntilThen]

This may not be the first Glenn OTL amp but it pretty much document what the Glenn Super 9 or Super 10 OTL is.
https://www.tweakfi.com/apps/blog/show/42754587

My previous Glenn Super 9 OTL is pretty much model after that.

 

[robo24]

I suggest that you keep an eye on that 5U4G. In the GOTL, with a pair of 6080s or 6AS7Gs, it's maxed out. It can provide at most 225mA whereas the amp wants about 250mA or more.

Thanks so much for that! I missed that on the spreadsheet where it says
"OK when running 6BX7 or 6BL7 (2, 4 or 6 tubes) but not other output tubes!
(Source: Glenn on post # 27864)"
It seems the 5U4GA (sorry B!) is fine though, but not what I have.

 

[gibosi]

The 5U4GB and the 5U4WG also work well.

 

[kvtaco17]

Actually re-soldering the pins fixed my problem, both tubes test much better and the loud pop hasn't shown up again... I noticed a small crack at the tip of a few pins with the tube wire just hanging out in there... This is probably the result of me constantly changing tubes and damaging the pins.

 

[robo24]

Speaking of 5U4G, anyone here try the Elrog one on their Glenn? Crazy expensive, but their 300b MO are amazing and I wonder if that rectifier would be worth it.

 

[kvtaco17]

Speaking of 5U4G, anyone here try the Elrog one on their Glenn? Crazy expensive, but their 300b MO are amazing and I wonder if that rectifier would be worth it.

I'm kinda curious too, someone here has to have tried this...

 

[robo24]

I've seen older posts about Melz 6H12C/6N12S tubes. Before I buy & install them, just wanted to confirm they can be used in mine instead of 6 6BX7 tubes which it can use just fine.

 

[gibosi]

I've seen older posts about Melz 6H12C/6N12S tubes. Before I buy & install them, just wanted to confirm they can be used in mine instead of 6 6BX7 tubes which it can use just fine.

I routinely run 6, three on each side. A very nice alternative to the 6BX7.