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An illustrated guide to building an F5
An illustrated guide to building an F5
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Old 15th May 2011, 09:00 PM   #61
Woody1911a1 is offline Woody1911a1  United States
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no problems merlin , you can't bias it with the light bulb in series . thats just for starting up so that if you have a problem you don't let out too much smoke

turn off your amp , disconnect the lightbulb , RETURN !!!!your pots to ZERO !!! before connecting your amp direct to mains .

if you don't have zenmod's guide to biasing up go find it before proceeding . i believe he posted it in 6L6's original build thread .

and i repeat RETURN YOUR POTS TO ZERO !!!!

cheers Woody
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Old 15th May 2011, 09:08 PM   #62
Woody1911a1 is offline Woody1911a1  United States
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ok what happened to your original build thread 6L6 ? invalid thread ? geez
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Old 15th May 2011, 09:25 PM   #63
merlin2069er is offline merlin2069er  Canada
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I think I broke that thread
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Old 15th May 2011, 09:30 PM   #64
Woody1911a1 is offline Woody1911a1  United States
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Quote:
Originally Posted by merlin2069er View Post
I think I broke that thread
lmaoooooo , no i think jim had a mod do a lot of editing . kind of a shame . there was a lot of good stuff there .

gotta get dinner on , but bbs .
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Old 15th May 2011, 09:38 PM   #65
Woody1911a1 is offline Woody1911a1  United States
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give me 15 mins and i'll get you going merlin
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Old 15th May 2011, 09:45 PM   #66
merlin2069er is offline merlin2069er  Canada
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Ok, I reviewed the first page of this thread. I'll have to print out a hard copy for reference.

Anyways, what does mosfet Iq refer to? Isn't that the voltage across R11 or R12?

DC offset it the voltage at the speaker outputs.

And max voltage is voltage between v+ & v-.

That right?
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Old 15th May 2011, 10:10 PM   #67
Andersonix is offline Andersonix  Sweden
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An illustrated guide to building an F5
Iq = quiescent current (idle current)
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Old 15th May 2011, 10:14 PM   #68
Woody1911a1 is offline Woody1911a1  United States
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oh cool , just realized 6L6 saved that in diff format . was more interesting in the original zm post though :P

Iq refers to current "I" I=v/r . in this case the known is r .47 ohms so voltage is what you're monitoring over r11 &12 to arrive at that current .

and yes dc offset is the voltage at the speaker outputs .

not sure what max voltage you're reffering to .
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Old 15th May 2011, 10:22 PM   #69
Andersonix is offline Andersonix  Sweden
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An illustrated guide to building an F5
From Zen Mods biasing procedure:
"place one voltmeter across PSU caps ( best between + and - of PSU) to observe max voltage of PSU"

My ASSUMPTION is that one is curious to see how stiff the PS is.
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Old 15th May 2011, 10:36 PM   #70
Woody1911a1 is offline Woody1911a1  United States
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Quote:
Originally Posted by Andersonix View Post
From Zen Mods biasing procedure:
"place one voltmeter across PSU caps ( best between + and - of PSU) to observe max voltage of PSU"

My ASSUMPTION is that one is curious to see how stiff the PS is.
yup , sorry , making pizza dough . and thanx andersonic re: Iq = quiescent current (idle current) learning every day here
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