| Title: | GUITARnotes - Where Every Note has Emotion |
| Notice: | Discussion of the finer stringed instruments |
| Moderator: | KDX200::COOPER |
| Created: | Thu Aug 14 1986 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 3280 |
| Total number of notes: | 61432 |
I did some work on my Fender Super Reverb on the weekend. I took a look at the bias circuit and it only allows a range of -47V to -63V. It has a 10k pot on top of a 27k resistor fed by -63V. They probably did this to keep it in the AB class range. I have the schematic for the CBS version of the amp with 6V6's instead of 6L6's and they show the bias as -35V (they use a 10k resistor instead of 27k). Should i play with this?? I was going to add a 2ohm 10W resistor between each cathode and ground on the 6L6's to allow me to see what the bias is doing to the plate current. What kind of voltage should i expect across these resistors when things are setup properly? mark
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2114.1 | Super biasing | LEDS::BURATI | Tue Feb 19 1991 22:50 | 5 | |
Most of the mid '60s supers use a bias of -52V to -55V.
I've never heard of a Super with 6V6 output stage. And I've
seen a lot of Super Reverb schematics. Are you sure about this?
--Ron
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| 2114.2 | cleaned my glasses | FSCORE::KAYE | where's my Kama Sutra pop-up book for zero-g | Thu Feb 21 1991 14:21 | 8 |
> I've never heard of a Super with 6V6 output stage. And I've
> seen a lot of Super Reverb schematics. Are you sure about this?
After cleaning my glasses, the schematic is for a 'Deluxe Reverb'.
Very close tho, a couple of resistor values and the output tubes
are the only differences.
mark
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