I'm opening this new thread as it seems like the offer for F2 boards has been lost within the original WTB inquiry.
The F2 amp board has a scoring line and is good for two channels.
Price for two channel pcb is USD$18, shipping included, paypal payment to my e-mail address posted here: http://audiosector.com/contact.asp
All boards will be shipped by airmail, with no tracking and no insurance and I cannot assume responsibility for lost packages. If you need insurance, please add $7 to your order.
The dual channel board is pictured below, output devices spacing is exactly as with F4, F5 and AJ pcbs, so the boards are interchangeable.
The matching power supply board available from this link: http://www.diyaudio.com/forums/showthread.php?t=149672
The F2 amp board has a scoring line and is good for two channels.
Price for two channel pcb is USD$18, shipping included, paypal payment to my e-mail address posted here: http://audiosector.com/contact.asp
All boards will be shipped by airmail, with no tracking and no insurance and I cannot assume responsibility for lost packages. If you need insurance, please add $7 to your order.
The dual channel board is pictured below, output devices spacing is exactly as with F4, F5 and AJ pcbs, so the boards are interchangeable.
The matching power supply board available from this link: http://www.diyaudio.com/forums/showthread.php?t=149672
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Only F5 boards are still available: http://www.diyaudio.com/forums/showthread.php?t=140306
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Nice to see all those pcb lined up next to each other. I currently designing my next Firstwatt amps. One chassis design with interchangeable Firstwatt amps. Lucky i got the F5 board but unfortunately the Aleph-J and F4 stock is exhausted. Peter do you have any idea when they are available again ? I read something about thesting the Aleph-J X versions. And can you give the dimensions of the space between the MOSFETs and board dimensions to double check my chassis design ?
I suppose with the OB article coming up soon, interest in the high power F4 will reignite. It seems most suitable of all the Fs to drive the big woofers.
I've driven OB woofer currently with an F5, and previously with an F2, both quite successfully. (see Dick Olshers OB-1) I prefer the F5. Most OB woofers are fairly sensitive, so don't take a ton of power. You can dual Mono an F5 like the F4 if you need more power.
Peter, is the F2 board fror the "old" current source amp, or for the new srpp semisouth amplifier???
Thanks, Dirk
This is for original F2 amp, the new one I believe is marked as J2
The F2 will get a new schematic at some point for a mod for a JFET in place of the N channel 240. It has not been published.
The J2 itself is a SRPP amp. The F2 single ended.
Only F5 boards are still available: http://www.diyaudio.com/forums/showthread.php?t=140306
I don't know, I'm still stuck with 60 or so pcs of F2.
Hi Peter
From the above I can't really make it out, but I am interested in a 2x two channel board of the F2. Do you have them available?
Erik
Yes, I have plenty of F2 amp boards, also matching PS boards are available: http://www.diyaudio.com/forums/showthread.php?t=149672
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