I apologize to everyone who participates in this thread. Mine is perhaps a trivial request but so far I have not seen the problem of choosing power supply very developed. in short, what would be the simplest and most effective solution to feed sissysit? what scheme to adopt? It has aroused great interest in me to be able to use a capacitor multiplier which I believe is capable of considerable performance.
The Easy Peasy by Juma for ex. It would seem to me simple and of excellent performance but I did not understand if it could sustain a constant current of bias of 1.7 - 2A.
ZenMod what is your idea about it?
The Easy Peasy by Juma for ex. It would seem to me simple and of excellent performance but I did not understand if it could sustain a constant current of bias of 1.7 - 2A.
ZenMod what is your idea about it?
I will be building a First Watt type of CRC supply, dual mono with probably 18V 300VA transformer per channel.
Zen Mod loves dual mono.
Zen Mod loves dual mono.
thank you for expressing your opinion .... and ... I also love the dual mono absolutely
dual 18Vac jobbie per channel, 250VA as minimum , two bridges , CRC ...... I'm using 33mF-0R1-33mF per rail
no multipliers , no regs
each Donut having own fuse and NTC on primary side , also each channel having NTC from main GND to chassis
so , just power cord and switch are shared between two PSUs
final result is , as always , something as 22V5dc per rail , no fuss/broom/noise/tizzzz/zing
🙂
no multipliers , no regs
each Donut having own fuse and NTC on primary side , also each channel having NTC from main GND to chassis
so , just power cord and switch are shared between two PSUs
final result is , as always , something as 22V5dc per rail , no fuss/broom/noise/tizzzz/zing
🙂
Few more things aboout Donuts
if possible , static shield (so called screen or blind winding between primary and secondaries ) can't harm
also - strip shield (around Donut perimeter) is welcome , too
both are either normal or optional , at decent Donut Vendors
if possible , static shield (so called screen or blind winding between primary and secondaries ) can't harm
also - strip shield (around Donut perimeter) is welcome , too
both are either normal or optional , at decent Donut Vendors
A little question.... Would it be possible to use a 24V ac transformer to have about 32v DC? Should you vary the bias? Would it be too hot to dissipate? Could we have advantages or disadvantages? Thank you all. Fabio.
you can ......... but that's waaaaay too much for my liking .........
let's reserve that ( and higher than that ) for GodzillaSIT , with some other mosfet down
let's reserve that ( and higher than that ) for GodzillaSIT , with some other mosfet down
Thanks, Zen Mod, your replay is clear.... It was because I have two 24v 500w not used. Regards, Fabio.
I'm thinking of putting either a DC protect in or a couple of large elcaps back to back bypassed by a film cap in series with the speaker, and seeing if i can't squeeze out a few extra watts, but would need to make sure that if the 9240 goes that it doesn't take the optocoupler or the hall sensors or any of the other components out with it.
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9140 ;
It'll work as charm , under condition that heatsinking is proper and that you use Keratherm
for EU based boyz , look at conrad.de for T0247 Keratherm , cheap as ....... peanuts
🙂
It'll work as charm , under condition that heatsinking is proper and that you use Keratherm
for EU based boyz , look at conrad.de for T0247 Keratherm , cheap as ....... peanuts
🙂
....for GodzillaSIT , with some other mosfet down
New thread title :"SITzilla Monster Topologies Amp's Battle"
Attachments
Just ordered pair of Cinemag CMOQ-4HPC direct from Cinemag - $100 inc ship to UK
Don Audio had quoted 135,66€ inc tax and shipping
Don Audio had quoted 135,66€ inc tax and shipping
Testing of IRFP9140
Can I have a similar circuit like that in Post#81 showing how to test IRFP9140?
Thanks in advance.
Can I have a similar circuit like that in Post#81 showing how to test IRFP9140?
Thanks in advance.
it is possible that mine may appear to be an exaggerated action. but I believe that if you really want to make a completely dual mono amp you have to use two double secondary transformers, 2x2 rectifier bridges, 2 CRC cards ... in short everything doubled. I start from the concept that the power supply is an integral part of the amplification circuit and I do not like that what happens electrically in a channel is common to the other channel in the power supply. Is this my concept shared or am I doing wrong?
pretty much normal thing , when doing dual-mono construction ......
if everything is in one case , sole thing shared is mains cable and switch ..... and call it dual-mono
when done in separate cases , you have monoblocks
I like not having common PSU , shared between channels
Papa properly made SIT-1 amp , all other ones are plain sissy
if everything is in one case , sole thing shared is mains cable and switch ..... and call it dual-mono
when done in separate cases , you have monoblocks
I like not having common PSU , shared between channels
Papa properly made SIT-1 amp , all other ones are plain sissy