Lol. I hope so. I fried my .47ohm resistors on one side because I guess I didn't know what to check for. (Low resistance, but there's three wires on a trimpot. As one side's resistance goes up, the other goes down, right? )
Do you have a dim bulb tester? If so, trust it.. I used a 25 watt and then a 75 watt bulb.. If the light stays on, especially with only one side hooked up, then there is a problem.
Do you have a dim bulb tester? If so, trust it.. I used a 25 watt and then a 75 watt bulb.. If the light stays on, especially with only one side hooked up, then there is a problem.
Cheers again guys.
I have checked the pots... All good.
I have a bulb limiter and a cheap Variac, which is quite scary. But I have used both to get to this point.
Again many thanks to you all.
I have checked the pots... All good.
I have a bulb limiter and a cheap Variac, which is quite scary. But I have used both to get to this point.
Again many thanks to you all.
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Remember!
Before you remove the bulb limiter, and Variac.
Turn the bias down, then power up, and slowly adjust (raise) bias again.
Well, I'm sitting listening to Beggars Banquet, an LP I've known for over 30 years and I'm hearing deeper into the mix. Just incredible.
I'm running at .520v and it sounds fantastic. Not hot at all just warm.
Thanks a lot to everyone that chimed in.
What a site, I'm not gonna start my F4 for a while.
I'm running at .520v and it sounds fantastic. Not hot at all just warm.
Thanks a lot to everyone that chimed in.
What a site, I'm not gonna start my F4 for a while.
Thank you 6L6. I'm lovin it.
I'm listening to a full DIY system now. 834 phono, frugal horns, F5 and a heavily modded Lenco and an Audiomods series 6.
It's the best system I've ever had.
The DIY audio community is awesome.
I'm listening to a full DIY system now. 834 phono, frugal horns, F5 and a heavily modded Lenco and an Audiomods series 6.
It's the best system I've ever had.
The DIY audio community is awesome.
Isn't that a great feeling? I quit chasing a lot of expensive things, and still had my best system as well. Of course, there is good stuff to chase, real Pass Labs! But for mere mortals this is the stuff....
Russellc
It is indeed. A fantastic feeling. I also have a B1 and an F4. I don't think I'll stop there.
After breaking my F5 down into a pair of monoblocks, I managed to fry the outputs in the one amp. Not sure how I did it exactly. I was aiming for about 1.55 amp bias. Was this a totally stupid idea? The things were barely getting hot. I've got more parts on the way, but I'd really like to avoid repeating this stupid mistake.
That was my thinking too. They're on huge heatsinks and weren't getting anywhere near warm enough not to touch for any length of time. They were clearly making good contact with the heatsinks. I'm thinking I'm going to aim for 1.45 amp and go with that for a while and see how the old pair in the other amp hold up. They're idling just fine at about 1.55 amp even after letting it cool and powering it on a few times. Thinking I might have had a weak part that just gave up and took the other one out with it.
