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Old 23rd October 2012, 01:31 PM   #1441
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it looks like a CRC filter board and a bias supply input board with the 10uf input cap..
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Old 23rd October 2012, 03:28 PM   #1442
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Quote:
Originally Posted by vdi_nenna View Post
Aleksi M, what are we looking at here? Are these boards for a SIT amp or just power supplies?
juanitox pretty much nailed it. "Universal" PSU board, biasing board (including 10uF input cap) and the third one is for the output caps (Electrolytic + 10uF PP).
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Old 23rd October 2012, 03:32 PM   #1443
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Cool.
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Old 23rd October 2012, 04:56 PM   #1444
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Default Gyrator Circuit?

Anyone look into using a gyrator circuit to take the place of an inductor or is a CCS still a better option? Can a gyrator circuit increase power effeciency like an standard inductor?
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Old 23rd October 2012, 05:07 PM   #1445
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Originally Posted by vdi_nenna View Post
..... Can a gyrator circuit increase power effeciency like an standard inductor?
nope

there is no inductive storage
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Old 23rd October 2012, 05:14 PM   #1446
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Ok, thanks.
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Old 31st October 2012, 06:32 PM   #1447
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Here is my SIT amp loaded with 193V inductors. Big thanks to NP and Michael also to Wayne, Wrenchone and everyone that helped troubleshoot it at BAF.

Just in case anyone is wondering, the mounting lugs on big Rifa caps are internally connected to the negative terminal. So beware if you plan to use them for output coupling.

The description of the sound from the Firstwatt articles/manuals is spot on.
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Old 31st October 2012, 06:38 PM   #1448
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incredible nice.......!
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Old 31st October 2012, 06:54 PM   #1449
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Thanks!

Here is an upskirt shot for those into that sort of thing taken by AMB at BAF. I still need to clean up the wiring because I was in a hurry to get it ready for BAF.

Thanks also to my friend David who took care of the machining on the heatsinks.
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Old 31st October 2012, 08:40 PM   #1450
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trés mignon le petit dernier!

mine have a little problem, as i change to a passive preamp ( ldr) i have changed the input caps to go with my choke gate leak from 1uf to 3,9uf
now i have full bass again but i pick some hum

do you think it"s my unshielded input cap that is making antenna , or a ringing between choke and caps? or it"s just an horrible halloween buzz
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