figured out why my apex psu protection board wasn't working. It was a BC546 that was faulty (brand new).
After replacement, the output short circuit protection works (it triggers at about 3.5 amps drawn on the rails, 2x60v power supply), however the dc output protection is not. I've changed the dc offset of my amp (apex ax17) to output about 7 volts dc, however the relay hasn't disconnected the output.
What is the dc minimum value at output needed for the protection to kick in?
After replacement, the output short circuit protection works (it triggers at about 3.5 amps drawn on the rails, 2x60v power supply), however the dc output protection is not. I've changed the dc offset of my amp (apex ax17) to output about 7 volts dc, however the relay hasn't disconnected the output.
What is the dc minimum value at output needed for the protection to kick in?
Apex fh9 xrk mode
Hi to all!
I finally finished APEX FH9 XRK mode last night, everything went without hickups and with no smoke
.
Sound is awesome, bass is great and details are very close to my JLH 1969 so I'm very pleased. I think it is more suitable to modern type of electronic music than JLH, but I need more listening time for finall impressions. I made it partly with scrap electronics, IRFP devices are new, bought on ebay and housing is from old Antec Phantom series PC PSU. PCBs are home made. I use external 2x22V PSU for now. Thx to mr. Mile, XRK and Sonal Kunal for this great little amp!
Hi to all!
I finally finished APEX FH9 XRK mode last night, everything went without hickups and with no smoke
.Sound is awesome, bass is great and details are very close to my JLH 1969 so I'm very pleased. I think it is more suitable to modern type of electronic music than JLH, but I need more listening time for finall impressions. I made it partly with scrap electronics, IRFP devices are new, bought on ebay and housing is from old Antec Phantom series PC PSU. PCBs are home made. I use external 2x22V PSU for now. Thx to mr. Mile, XRK and Sonal Kunal for this great little amp!
Attachments
Hi to all!
I finally finished APEX FH9 XRK mode last night, everything went without hickups and with no smoke
Sound is awesome, bass is great and details are very close to my JLH 1969 so I'm very pleased. I think it is more suitable to modern type of electronic music than JLH, but I need more listening time for finall impressions. I made it partly with scrap electronics, IRFP devices are new, bought on ebay and housing is from old Antec Phantom series PC PSU. PCBs are home made. I use external 2x22V PSU for now. Thx to mr. Mile, XRK and Sonal Kunal for this great little amp!
Nice work,
Regards
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Hi sir do you have the schematic and pcb for this selector? Thanks in advance!
