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Old 11th January 2012, 06:57 AM   #11
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wow, that is very cool amp! I like FU-50 very much
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Old 11th January 2012, 07:29 AM   #12
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what is the material of the chasis?
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Old 11th January 2012, 09:32 PM   #13
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Quote:
Originally Posted by Junm View Post
schematics please!
Shematics is very simple: only 5 elements on signal path!
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Old 11th January 2012, 09:35 PM   #14
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Originally Posted by M Gregg View Post
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

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The cable is 0.25mm silver in PTFE. The amp sound very good. Better than any EL34 amp I have heard.
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Old 12th January 2012, 03:03 AM   #15
Junm is offline Junm  Philippines
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Quote:
Originally Posted by matejsirk View Post
Shematics is very simple: only 5 elements on signal path!
Thanks....you give me idea for my future projects...my gu50's just arrived..
Nice build....
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Old 12th January 2012, 03:40 AM   #16
Einric is offline Einric  United States
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Now I want to do a GU50 even more, I liked the idea of 20w from an SE amp.
Not to mention getting the cast aluminum rugged sockets powder-coated in Chrome or Mopar Orange LOL.
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Old 12th January 2012, 03:47 AM   #17
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Originally Posted by Einric View Post
Now I want to do a GU50 even more, I liked the idea of 20w from an SE amp.
Not to mention getting the cast aluminum rugged sockets powder-coated in Chrome or Mopar Orange LOL.
Don't you see they look like trash bins, no matter how painted?
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Old 12th January 2012, 04:30 AM   #18
Einric is offline Einric  United States
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That's my kind of tube, over engineered and under appreciated.
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Old 12th January 2012, 07:06 AM   #19
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Also mine..I like FU-50 very much. When work in Triode mode the curves are very close to 300B.
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Old 26th January 2012, 01:35 AM   #20
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Quote:
Originally Posted by matejsirk View Post
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.
Hi Matej. You never said anything about the *sound* of your amp... How does it compare to some other topologies/tubes?
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