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Post subject: Well this question is for my toad friend he's chicken
Posted: Thu Jan 17, 2013 4:03 pm
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Location: Coupeville, WA
:mrgreen:

Mesa boogie .50Cal+ with 6L6's

the bias circuit is a weird duck fer sure, so he wants to know how it works (i'm sure others do also) it seems to him that there isn't a ground reference and it is making him ill..

looks to me Randy is creating a ratio that follows line voltage and may be even a quasi inductive circuit...well stumps me also

I was teaching blues in a prison so being an avid buyer of his markIII (in bubinga) a IV and a.22 (soon as i go one all the locals went out and got one...put it on ten..mic it and use dynamics to clean it up...killer amp i intend to get another and this speaker cab from heck that is silly bad to the bone from the 80's

so i had a grand budget and he built me two .50cal+ for the grand..and those little pups well boogied....back to fenders, red jones and a MKIII and my road warrior fave a Rivera 212

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Post subject: Re: Well this question is for my toad friend he's chicken
Posted: Thu Jan 17, 2013 11:38 pm
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Ground reference through D2, R131 and R115. :idea:

Kind of crude, but this is the circuit redrawn.

Image

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Post subject: Re: Well this question is for my toad friend he's chicken
Posted: Thu Jan 24, 2013 10:16 am
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shimmilou wrote:
Ground reference through D2, R131 and R115. :idea:

Kind of crude, but this is the circuit redrawn.

Image


I yakked his ear off to join the forum...wonder if he did? i'll have to tel him the "TRUTH" lies in the FENDER forum cuz the boogie guys and i flashed on it returning via the tranny (don't have the schematic up here right now...and the diode...stopped that idea from cooking further) cool now i'll taunt him :wink:

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