[leftside]

If anyone is interested in selling their glenn amp please PM me, thanks.

Collectors items now

 

[UntilThen]

Collectors items now

After GOTL, I learn never to sell your custom amps or any of the tubes you've collected so diligently over the years.

 

[Smallpie]

Just got a message today from Glenn about how he is doing better health wise and is planning new OTL amps in the making in a few weeks!!

 

[wotts]

That is good to hear. I'm glad he's doing better

 

[mordy]

Just got a message today from Glenn about how he is doing better health wise and is planning new OTL amps in the making in a few weeks!!

Great News!

 

[longbowbbs]

Nice to hear. Glad he is doing well.

 

[2359glenn]

Hi All

I am back somewhat feeble now but plan on working on amps again in a limited amount.
Designing a OTL amp that will drive the Caldera planar headphone properly as well as other high impedance phones.
Going to use 7236 or 6336 output tubes with 6J5/L63 drivers better sounding than any 6SN7. might be too high of current to use 6AS7s.
Did build a amp that uses 4 E130L output tubes to drive the Caldara but these are hard to get.

Will be good to talk to all of you again.
Glenn

 

[mordy]

Hi All

I am back somewhat feeble now but plan on working on amps again in a limited amount.
Designing a OTL amp that will drive the Caldera planar headphone properly as well as other high impedance phones.
Going to use 7236 or 6336 output tubes with 6J5/L63 drivers better sounding than any 6SN7. might be too high of current to use 6AS7s.
Did build a amp that uses 4 E130L output tubes to drive the Caldara but these are hard to get.

Will be good to talk to all of you again.
Glenn

Very happy to hear that you are back at building amps! Wishing you a complete recovery and great success!

 

[longbowbbs]

Great to see you are on the mend! It will be exciting to see what your next build is like.

 

[2359glenn]

Ooof. I had planned to send mine to him for repair, but I didn't hear back. I have one channel that fades as it warms up.



Looking good! I have a 1641 I wanted to try swapping in for the 596 I have in mine.

Hi

Have you taken the bottom off?
Might have a bad plate resistors on the 6SN7. At a point I thought that boutique parts would be better. RONG many unreliable.
I used Amtrans AMRG resistors on the plate load of the 6SN7 many have gone bad drifting when they worm up.
Replace them with a 22K ohm 2watt resistors.

 

[2359glenn]

I wish I could be involved in the discussion but Glenn has had my amp for 4 years now and I don't think I am ever getting it back.

I will get that amp back to you.
My problem now is I am to feeble to pick the amp up in the box.
I will make no more amps with 3 transformers and a couple of chokes just to heavy now.
Glenn

 

[2359glenn]

5CU4 rectifier for the GOTL:

https://www.ebay.com/itm/186339488401

This works fine in the GOTL, but I don't know of any other amp it will work in.

5CU4 is a great rectifier tube for the OTL but draws over 3amps filament current might overheat the transformer in other amps.

 

[jonathan c]

Hi All

I am back somewhat feeble now but plan on working on amps again in a limited amount.
Designing a OTL amp that will drive the Caldera planar headphone properly as well as other high impedance phones.
Going to use 7236 or 6336 output tubes with 6J5/L63 drivers better sounding than any 6SN7. might be too high of current to use 6AS7s.
Did build a amp that uses 4 E130L output tubes to drive the Caldara but these are hard to get.

Will be good to talk to all of you again.
Glenn

I am really happy to see / read you back on the threads.

 

[UntilThen]

Hi All

I am back somewhat feeble now but plan on working on amps again in a limited amount.
Designing a OTL amp that will drive the Caldera planar headphone properly as well as other high impedance phones.
Going to use 7236 or 6336 output tubes with 6J5/L63 drivers better sounding than any 6SN7. might be too high of current to use 6AS7s.
Did build a amp that uses 4 E130L output tubes to drive the Caldara but these are hard to get.

Will be good to talk to all of you again.
Glenn

Welcome back Glenn.

 

[Monsterzero]

Hi All

I am back somewhat feeble now but plan on working on amps again in a limited amount.
Designing a OTL amp that will drive the Caldera planar headphone properly as well as other high impedance phones.
Going to use 7236 or 6336 output tubes with 6J5/L63 drivers better sounding than any 6SN7. might be too high of current to use 6AS7s.
Did build a amp that uses 4 E130L output tubes to drive the Caldara but these are hard to get.

Will be good to talk to all of you again.
Glenn

Whoa! Now this is a pleasant surprise! Welcome back!