Are the trim pots supposed to be unbelievably sensitive? I'm barely even touching the screw driver and it jumps around like crazy. Same with the offset, it's crazy sensitive too. I managed to get everything set, going to let it go for 30 minutes and then check again.
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Those are single-turn pots. Yes, will be sensitive.
Dont use a screwdriver with a magnetic tip.
Did you set the 0.065V with the bulb in place? If no bulb, you are good.
If you used the bulb, turn the bias DOWN, remove the bulb, and set 0.065V, offset to zero as required.
Dont use a screwdriver with a magnetic tip.
Did you set the 0.065V with the bulb in place? If no bulb, you are good.
If you used the bulb, turn the bias DOWN, remove the bulb, and set 0.065V, offset to zero as required.
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I can't thank everyone enough! I got it stable and tested it out with my Borealis headphones and ADI-2 DAC set to -45dBr. Sounds amazing and everything seems to be good to go!
NVM, I see your edit. It looks like I'm all good to go. Everything sounds great, so I assume it's fine lol
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That’s got to be an amazing amp with the SemiSouths. Complete unobtanuim anymore. Never to be made again. So cool.
Use the "Force" Luke.
Hahahaha
Yeah single turns, they will most certainly turn your hair grey.
Hi Everyone,
Is it possible to build two F6 kits and wire them as balanced XLR monoblocks, similar to the Amp Camp Amp? Or is there something in the F6 circuit which prevents this type of configuration?
Any insight & advice is greatly appreciated...Thanks!
Is it possible to build two F6 kits and wire them as balanced XLR monoblocks, similar to the Amp Camp Amp? Or is there something in the F6 circuit which prevents this type of configuration?
Any insight & advice is greatly appreciated...Thanks!
If you are feeding them from an XLR source, it will work. Remember to take your output from the two speaker reds.
Yes, it works really fine, just pay attention if you have a speaker protect circuit, it should support balanced speaker output
Attachments
Biasing Balanced XLR F6 Monoblock
Hi Everyone,
I'm in the process of buying the parts I need to build a balanced F6 monoblock. Thinking ahead, does anyone know how to bias this type of amp? Any information would be greatly appreciated. It can get really expensive blowing up parts!
Hi Everyone,
I'm in the process of buying the parts I need to build a balanced F6 monoblock. Thinking ahead, does anyone know how to bias this type of amp? Any information would be greatly appreciated. It can get really expensive blowing up parts!
I REALLY like those heat sinks! Could you please share the mfr and part number, they look awesome?
Thanks!
Hello everyone
I finally finished my F6! I took my time, studied the build guide, browsed the thread, made mistakes. I’m now listening to it and enjoying it. My biggest delay without a question was getting the bias set. At first power up it wouldn’t let me get above .35v. Read read read, I liked “William 2001“ post #368 concerning R7 and R8, LED’s and trimmers and now I have good control over my bias.
I have about 15 hours on it and I think it sounds very nice and getting better as the hours go by.
I want to thank everyone participating in this forum!
I finally finished my F6! I took my time, studied the build guide, browsed the thread, made mistakes. I’m now listening to it and enjoying it. My biggest delay without a question was getting the bias set. At first power up it wouldn’t let me get above .35v. Read read read, I liked “William 2001“ post #368 concerning R7 and R8, LED’s and trimmers and now I have good control over my bias.
I have about 15 hours on it and I think it sounds very nice and getting better as the hours go by.
I want to thank everyone participating in this forum!
Attachments
Very neat wiring, good job. Enjoy the sound.
A couple of things:
-connect the purple shield wire from the transformer to the chassis ground, not to the audio ground on the power supply board.
-twist the pairs of wires from the power supply board to the capacitors.
🙂
A couple of things:
-connect the purple shield wire from the transformer to the chassis ground, not to the audio ground on the power supply board.
-twist the pairs of wires from the power supply board to the capacitors.
🙂
F6 parts kits with transformers and F6 PCB with transformers are now available at the diyAudio Store
