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matejsirk 9th January 2012 08:33 PM

My little SE with GU50
 
2 Attachment(s)
This is my little amp with GU50 and 6C3P as driver. Power 5W without any distortion. B+ around 390V, Catode bias with 720Ohm, OT 5200 ohm.

Wavebourn 9th January 2012 08:47 PM

Looks nice, very original!
Triode mode?

HollowState 9th January 2012 08:55 PM

Cool looking. What is the chassis? My first thought was a sauce pan. :D

nicoch58 9th January 2012 09:07 PM

Nice.... is name can be : tondo (roundel) :p

Junm 10th January 2012 02:02 AM

schematics please!

M Gregg 10th January 2012 09:39 AM

Its very nice..

But where is the under shot of the chassis and internals? :D

Whats the heat transfer between the GU50 and the chassis like? (How hot does it get after an hour?)
What kind of OP Tx have you used and where are they?

Just being nosey..LOL

Regards
M. Gregg

matejsirk 10th January 2012 02:27 PM

Quote:

Originally Posted by Wavebourn (Post 2854158)
Looks nice, very original!
Triode mode?

Triode mode, I will try pentode too. Wavebourn thx for inspiration (for GU50).

matejsirk 10th January 2012 02:32 PM

4 Attachment(s)
Quote:

Originally Posted by M Gregg (Post 2854904)
Its very nice..

But where is the under shot of the chassis and internals? :D

Whats the heat transfer between the GU50 and the chassis like? (How hot does it get after an hour?)
What kind of OP Tx have you used and where are they?

Just being nosey..LOL

Regards
M. Gregg

OT are from INDEL (made in Poland) - for EL84, very very cheap. All the material cost around 160 (210$) - I use Silver mica cap 0,1uF for interstage, Jantzen Audio terminals, custom made power transformer, russian Wire wounded cathode resistors for GU50 and 21 step pot (50K log)

see the pictures:

M Gregg 10th January 2012 02:51 PM

Quote:

Originally Posted by matejsirk (Post 2855245)
OT are from INDEL (made in Poland) - for EL84, very very cheap. All the material cost around 160€ (210$) - I use Silver mica cap 0,1uF for interstage, Jantzen Audio terminals, custom made power transformer, russian Wire wounded cathode resistors for GU50 and 21 step pot (50K log)

see the pictures:

Very inventive... :)

What cable have you used for the volume control? Looks like PTFE sleeve..

I like silver mica caps...Interesting use of the chokes..

Whats the sound like?
Its interesting how you have managed to fit all the components into the round chassis...seems like there should be more components crammed in..LOL

Regards
M. Gregg

piano3 11th January 2012 12:45 AM

Are you getting much inductance from those light ballasts?


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