200W MOSFET CFA amp

Hi Dadod,

How much is the amp board and the PS regulator? I'm interested in getting 2 100W board and 2 PS regulator.

Thanks,

Fred

Hi Fred,

If I order 10 100W CFA boards and 10 PS regulator boards the price will be 19 EUR plus shipping per board.
Please, if this is acceptable for you and for others in the list, let me know.
Problem is what I am going to do with the rest of PS regulator boards?
BR Damir
 
Hi Damir
i'm interested for 2 pcb of 100w CFA and 2 pcb for P.Regulator.After rectification i want to use CRC filter.Can you suggest values for dual mono?
Is sufficient 330va for every transformer?
Regards
Andreas

Andreas, you can use 4700uF - 0.22R 5W - 22000uF, that is what I use, and yes 330VA is more than sufficient.
Other solution is one transformer of 600VA, CRC and then two PS regulators, almost dual mono. I use that in my amp.
BR Damir
 
Ok Damir. Confirmed.

Thanks.

Fred

The list:

ydrozd -----100W CFA 4 boards,-----PS regulator 4 boards--confirmed
deps--------100W CFA 2 boards--------------------------------
Andreas B--100W CFA 2 boards,-----PS regulator 2 boards--confirmed
fredlock----100W CFA 2 boards------PS regulator 2 boards--confirmed

OK I will order 10 100w CFA boards and 10 PS regulator boards.

Damir
 
The list:

ydrozd -----100W CFA 4 boards,-----PS regulator 4 boards--confirmed
deps--------100W CFA 2 boards--------------------------------confirmed
Andreas B--100W CFA 2 boards,-----PS regulator 2 boards--confirmed
fredlock----100W CFA 2 boards------PS regulator 2 boards--confirmed
 
Dang, wish I had seen this a week ago. Could use a pair of pcb's :sad:

Anyway, I just got a gift from a friend a few days ago. It's a cooling tower with a total of 10 sets of 2SK176/2SJ76 from Hitachi, which was pulled from some pa amp. They are TO-3 types and seem to work ok.
Will your cfa 100w/200w amps work well with these, if the bias circuitry is adapted for these? Also, they won't fit on the current pcb layout, so they must be mounted using some short wires. Will this affect stability?
 
Dang, wish I had seen this a week ago. Could use a pair of pcb's :sad:

Anyway, I just got a gift from a friend a few days ago. It's a cooling tower with a total of 10 sets of 2SK176/2SJ76 from Hitachi, which was pulled from some pa amp. They are TO-3 types and seem to work ok.
Will your cfa 100w/200w amps work well with these, if the bias circuitry is adapted for these? Also, they won't fit on the current pcb layout, so they must be mounted using some short wires. Will this affect stability?

Sorry, all amp boards booked, look the list.
I don't know those mosfets and can't find the datasheet, all show plastic version 2SK1761???
 
I don't know those mosfets and can't find the datasheet, all show plastic version 2SK1761???

Sorry Damir, I made a typo for the p-channel fet. It's 2SK176 and 2SJ56.

I found them here https://www.datasheets360.com and have also attached the datasheets

I can take pictures if you like.
 

Attachments

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  • 2sj56.pdf
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