reverb in both channels´s pic. Is that ok?

[chocopower]

Hi!!

I have loking for this mod, and after read about it in 2 pics, this is what i did:

http://i101.photobucket.com/albums/m74/chocopower/Dibujo.jpg

Red wire is stock.
Green wire is after mod.


1. Desolder red wire from "X" in the left.
2. Solder it in "Z"
3. Put a bridge between "X" and "Y" in the fase inverse (litle green wire, left in board)

Is this ok?
Will put this the two channels in fase?


Best regards from Galicia and sorry for my inglish.

[Swarty]

The problem with that method (it is in one of the "guru" books), is that there is no isolation between the channels... thus the volumes controls completely interact with each other and it becomes a stupid balancing act. Move the mix resistors (the 2 220ks that form a "V" at the PI input) to point "Z" and insert both channels there (you will need to desolder the existing connection to the reverb channel). Reconnect the PI from point "Y" to the input cap.

[JJman]

Sending some of the "normal" channel thru the reverb will not put the channels in phase on a BF/SF Fender.

[fullerplast]

Sending some of the "normal" channel thru the reverb will not put the channels in phase on a BF/SF Fender.

Both approaches being discussed here will put the channels in phase. They add an inversion to the normal channel that was not there previously.

[chocopower]

The problem with that method ......


Hi!!! Do you know a easyer method?

......I found this in another forum:

"I have a mod for combining the channels before the
reverb that I've been doing for years. I don't know if
I'm the first person to think of it, but I haven't seen
anyone else do it. Then again, I don't read all the
"guru" books.

The second preamp stages of both channels, which
already share a cathode resistor and bypass cap, can
be fully paralleled. Remove the plate resistor,
coupling cap and signal lead to the 220K summing
resistors from the Normal channel second stage.
Change the Vibrato channel second stage plate
resistor to 47K or 56K to stay closer to the original
tone, or leave it at 100K for a little more gain. You
should probably upgrade this resistor to 1 watt since
twice the current will be passing through it. Connect
the plate of Normal stage #2 to the plate of Vibrato
stage #2. Remove the 220K "summing" resistors
before the phase inverter. Replace the 220K for the
Vibrato channel with a jumper (short piece of wire).

The benefits of this mod include:

1) It's easy to do, and easily reversed if desired.

2) The tremolo and reverb work on both channels.

3) The two channels are now of the same polarity, so
their inputs can be linked (paralleled) for more
drive."


And this in our forum:

http://www.thegearpage.net/board/showthread.php?t=202703

http://www.thegearpage.net/board/showthread.php?t=207837


A pic of one of those will be perfect.

see you!!!

[chocopower]

Hi!!
I did it this mornig. It works!!!!!

Just one note....
The two channels are now in phase.
No strange balance betwen Vibrato Ch. volumen and Normal Ch. volumen.
The bridge throw the two 220K resistors up the channel Vibrato gain.If you don´t like it..... just solder the wire to ground instead to the other 220K resistor.

best regards from Galicia...:dude

[BLC]

I have used this mod for years ( 20 ) with never any ill affects.