Leftover transformers

[h00hbt]

Hi all

Ok, so I have some leftover transformers that are looking for a project and I don´t know what to make with them. Do you have any suggestions?
I have just compleated a KT88 based amp so this is no option.

I would like to use them in an stereo integrated amp.

Power Transformer:

Primary:
230VAC

Sec:
1x390V 0,5A
2x5V 2A
2x6,3V 4A
2x3,15-0-3,15V 2A
1x40V 0,1A

Output transformers:

PP 4K

Cheers

 

[pieter t]

You could consider a fixed bias KT88 triode push pull amp; will give you some 15 watts of power.

 

[taj]

It screams push-pull EL34 with fixed bias to me. That's probably not a heck of a lot different than your previous KT88 project though.

..Todd

 

[eeyore]

Single ended 300B, 2A3, 45, etc? Can use a choke input to get a lower voltage, or tune the B+ with the cap. Or do SE with a pentode.

 

[eeyore]

Or a PP with real triodes.

 

[Tubelab_com]

I vote for Petes red board:

http://www.diyaudio.com/forums/tubes-valves/151206-posted-new-p-p-power-amp-design.html

 

[tomchr]

300B!! That transformer would be perfect for my latest 300B SET adventure.

~Tom

 

[TonyTecson]

Output transformers:

PP 4K

sets are out unless he is willing to buy new SE traffos....

 

[Miles Prower]

Don't know about that power xfmr, but that 4K P-2-P OPT would work nicely with 6BQ6GA/GTB finals.

 

[h00hbt]

It screams push-pull EL34 with fixed bias to me. That's probably not a heck of a lot different than your previous KT88 project though.

..Todd

Hi taj

Yes! this is what I was thinking too but would 4K OPT´s work? You don´t happen to have a stereo integrated PP EL34 schematic somewhere?

Cheers

 

[pieter t]

Ever heard of g o o g l e ....?
You will find tons of PP EL34's there.

 

[h00hbt]

Ever heard of g o o g l e ....?
You will find tons of PP EL34's there.

pieter t

Google? no, tell me more....

Of course I know Google, Im not stupid you know. I have searched Google but havn´t found a stereo integrated EL34 schematic that fits, this is the reason for posting here, ok. Please Google for me and find one.

Cheers

 

[TonyTecson]

here ya go......🙂 EL34 schematic - Hanapin sa Google

 

[pieter t]

and how about this one, courtesy Allen Wright.

 

[TonyTecson]

how about the psu drawing for that? thanks...

 

[pieter t]

+ psu