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Old 28th February 2018, 06:56 PM   #8231
adam1016 is offline adam1016  United States
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acamilicko, that's one of the most beautiful amps I've ever seen. I wish I had those design skills, but my amps are always a utilitarian metal plate on a wood base, similar to bottlehead designs. What's the next step up from that without going full out custom metalwork?
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Old 1st March 2018, 11:01 AM   #8232
acamilicko is offline acamilicko  Serbia
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Hey Adam, thanks for your kind words. This is mine very first tube device, and I was really trying to go away from standard bottlehead design.. You can view more detailed images on link I provided to our local diyaudio forum how it is built.
A wooden frame is actually made out of ash tree, inside of it is a plate holding PCBs, some are upside down and preamp PCB is attached to top, but normal. Not any metal work done, I have in neighborhood a plexiglass cutting store so it is all done there, front plate, back plate, etc... So combination wood-plexi for all
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Old 2nd March 2018, 05:26 PM   #8233
artosalo is offline artosalo  Finland
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V8 with 8 x GU50. My friend has interesting project under construction.
http://www.valveaudio.fi/66339631
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Old 2nd March 2018, 06:33 PM   #8234
russc is offline russc  England
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What do the plug leads do?
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Old 2nd March 2018, 06:47 PM   #8235
soundbrigade is offline soundbrigade  Sweden
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Quote:
Originally Posted by artosalo View Post
V8 with 8 x GU50. My friend has interesting project under construction.
http://www.valveaudio.fi/66339631
You need a suitable loudspeaker for that one:

Click the image to open in full size.

V8
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Old 3rd March 2018, 06:36 AM   #8236
artosalo is offline artosalo  Finland
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Quote:
What do the plug leads do?
Heater supply leads, 12,6 Vdc.

Quote:
You need a suitable loudspeaker for that one:
Stunning !!
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Old 3rd March 2018, 11:17 AM   #8237
russc is offline russc  England
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Quote:
You need a suitable loudspeaker for that one:
That is what you call a ported design!
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Old 12th March 2018, 06:29 PM   #8238
Wavebourn is offline Wavebourn  United States
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Building a new version of Tower amp. 2x100W SiC SE, augmented by current and voltage. The same driver with Gyrator - loaded 6N1P and 6P15P.
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Old 12th March 2018, 06:47 PM   #8239
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by Wavebourn View Post
2x100W SiC SE, augmented by current and voltage.
My gosh, that's a heat-monster. What does 'augmented by current and voltage mean' - aren't all amplifiers augmented by current and voltage - or is this some kind of sliding bias thing ?
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Old 12th March 2018, 08:43 PM   #8240
Wavebourn is offline Wavebourn  United States
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No sliding bias, just modulated power source for the output JFET follower that keeps voltage across it stable, and a CCS load modulated by the signal itself.
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