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F6 Illustrated Build Guide
F6 Illustrated Build Guide
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Old 1st August 2021, 04:25 PM   #3731
6sX7 is offline 6sX7  United States
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Join Date: Apr 2018
Quote:
Originally Posted by avdesignguru View Post
It's all those red LEDs. Blue is more soothing (just kidding)

My personal experience was that 550mV was the point at which my F6 started to sound good. Below that, it just did not sound "right". Above 575mV I could not hear any improvement. More bias just increased the heat sink temps.
Thanks for the words of advice. And the giggle. I needed the giggle. Speaking of giggles, for giggles, I tried the amp this morning, to see if the bias would still hold. R7 (the zener feeder) is smoking. I tried the 3k ones with the 6V8 zener that Zen Mod suggested. Looks like I did something wrong. Luckily I have the stock kit resistors and zeners to try as opposed to waiting for another Mouser/DigiKey shipment. Regardless, time to trouble shoot before I fry another resistor or two. Before that, fresh air and sunshine!
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Old 2nd August 2021, 02:24 AM   #3732
6sX7 is offline 6sX7  United States
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Burnt up R4 on the B channel. Anyone got any suggestions?
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Old 2nd August 2021, 02:36 AM   #3733
bkdog is offline bkdog
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Join Date: May 2005
Location: in a house
DC offset on the output?
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Old 2nd August 2021, 03:29 AM   #3734
6sX7 is offline 6sX7  United States
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Join Date: Apr 2018
I zeroed it out last night but didn't test it when I fired it back up in the morning so I'm unsure where it was at the time of the fry. Need to order replacement resistors then going to check all the components I can and reflow the board.
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