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Old 13th November 2011, 08:46 PM   #431
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Quote:
Originally Posted by tinitus View Post
Salas reg sounds interesting
I could 'steal' the reg/supply section from a couple of boards I have from symmetric B1 project GB
have thought about it, but I don't know if its suited fore this voltage
remember someone having pretty hot mosfets
and my trafo is 2x22Vac
maybe good heatsinks will do the trick
Check out the 'SSLV1.1 builds and fairytales' thread but I have now modified the reg and the mosfet are now running pleasantly warm and not terminally hot as before. The problem was that I was not balancing the input current and output current. The excess input current was resulting in excessive heat.
I'll keep you posted.
Chris
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Old 15th November 2011, 11:06 PM   #432
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hey,
its OT, and fore other purpos so I hope a short answer will do

will it be ok to raise input to ground resisitor to about 1M ohm or so, to achieve high Z input ?
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Old 16th November 2011, 12:14 AM   #433
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The question will be whether that interacts poorly with any leakage current from fets. I wouldn't think so. Also, don't higher value resistors introduce more noise relative to their lower rated counterparts? Just guessing though.
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Old 16th November 2011, 01:45 AM   #434
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Also, don't higher value resistors introduce more noise relative to their lower rated counterparts?
yes
just got this crazy thought I would test it on my bass guitar
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Old 16th November 2011, 07:18 AM   #435
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the source [I mean where the signal comes from - preamp] will also have a resistor, and that often is not more than 100k.
they are in parallel.
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Old 16th November 2011, 11:39 AM   #436
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well, it is a bit quiet, so....

I was thinking of plugging bass guitar jack directly into BA3 FE

if a stereo module, maybe I could cascade them(series), with master control between
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Old 19th November 2011, 05:51 AM   #437
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Before I realized BA2 front end was already obsoleted by BA3,
I had thrown a few of my zany ideas at the older topology...
Shunt regulated tail, etc etc...
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File Type: gif SRBA2.gif (30.6 KB, 1092 views)
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Old 21st November 2011, 12:27 AM   #438
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Originally Posted by kenpeter View Post
Before I realized BA2 front end was already obsoleted by BA3...
Nothing is obsolete. Just different.

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Old 21st November 2011, 01:14 AM   #439
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ZM, You know where to get some Icar caps on this side of the pond? Or perhaps a known equivalent. considering this as last cap before BA output stage. I will have 54000 uF with seperate PSU case, another 24000uF power amp case. Haven't considerd whether there is anything to having the same amount in on each C leg of CRC

Last edited by buzzforb; 21st November 2011 at 01:17 AM.
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Old 21st November 2011, 01:20 AM   #440
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just use any proper motor runs

last time I checked ( somewhere in first decade of making Klipsch Horns ) GE were decent .....

dunno - maybe just try to avoid cheapest ones
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