[Emooze]

Very nice!

Did you find using multiple transformers was a better solution than getting a single one with all the windings? And where did you get the boards from?

 

[spritzer]

The amp was built from scraps so to speak, hence reused chassis (notice the extra holes inside the amp) and yes, the multiple transformers. It does make fitting a delay timer for the tubes a bit easier but this layout just fitted the chassis I had at hand. I have a whole pile of KGSS/BH parts here and though it was about time I cased one up to make it presentable so I gutted my first KGSS to fit this instead. I had the amp PCB's made and got the PSU board from Headamp.

 

[cetoole]

Got a bit of work to do still since there is a bit of visible oscillation, probably more aggressive grid stoppers, but it is functioning and sounding quite good. Currently set up to use E810F/7788, though it can and will be modified to run some D3A, just to try it out. Custom 7200:32ohm 2w ungapped Electra-print OPTs, 5.6uf ICW ClarityCap SA parafeed coupling caps, Pimm Self Biased Cascoded MOSFET plate loads, OPT wired for Western Electric connection (bottom returned directly to cathode), and 75ohm unbypassed cathode bias resistor. This is based off dsavitsk's ongoing l'espressivo project.

 

[Beefy]

Looking great, Colin

 

[Rescue Toaster]

Is that solid state rectification, cetoole? I can't see the diodes.

 

[luvdunhill]

Quote:

Originally Posted by Rescue Toaster /img/forum/go_quote.gif Is that solid state rectification, cetoole? I can't see the diodes.

eeeh, but can you see the tube?

 

[Rescue Toaster]

Obviously not...

 

[cetoole]

Sand rectifiers, using a pair of UF4007. I gave a bit of thought to using a 6by5, but that obviously would not have fit this case.

 

[fishski13]

my B22:
-DIY mahagony/aluminum chassis with custom face-plates from FPE.
-100VA 30V+30V encapsulated TX from SumR.
-PEC pot and Cardas signal wire.

http://i23.photobucket.com/albums/b3...13/B22/037.jpg
http://i23.photobucket.com/albums/b3...13/B22/041.jpg
http://i23.photobucket.com/albums/b3...13/B22/042.jpg
http://i23.photobucket.com/albums/b3...13/B22/043.jpg
http://i23.photobucket.com/albums/b3...13/B22/047.jpg

[/IMG]

 

[rhester]

very nice

 

[Steve Eddy]

Beautiful!

se

 

[aloksatoor]

pretty

 

[OutdoorXplorer]

nice. care to replicate another set for me....

 

[mattcalf]

Stunning build mate!
I really like the hard-wired Sigma22, not sure why.

Thanks for sharing.

 

[fishski13]

thanks everyone.

Quote:

Originally Posted by mattcalf /img/forum/go_quote.gif Stunning build mate! I really like the hard-wired Sigma22, not sure why. Thanks for sharing.

it's cheaper

.