bridging two channels on Fender amp

[guitarPsych]

I remember reading a while back that some people, using a Fender Bassman
head, run a patch cable between channel 1 and 2, like this:

channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.

Is this something that can be done safely with a Deluxe Reverb? I
assume this just means you have more adjustments for tone and two tubes
for preamp stage. Let me know if that sounds incorrect.

[Grip]

I tried that on my SF Pro, can't say as it really changed the sound all that
much, but I certainly think it safe

Post by guitarPsych
I remember reading a while back that some people, using a Fender Bassman
channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.
Is this something that can be done safely with a Deluxe Reverb? I
assume this just means you have more adjustments for tone and two tubes
for preamp stage. Let me know if that sounds incorrect.

[Elmo' 7#9]

Post by Grip
I tried that on my SF Pro, can't say as it really changed the sound all that
much, but I certainly think it safe

Do it on your SF pro with DIFFERENT tone control settings
on each channel (more treble on the vibrato channel).

Now engage the vibrato.

Beautiful.

It adds a "pinging" resonance to the "vibrato" effect
(which is REALLY tremolo).

Elmo' 7#9

[Grip]

Will try today, never set it up like that before

Post by Elmo' 7#9

Post by Grip
I tried that on my SF Pro, can't say as it really changed the sound all

that

Post by Grip
much, but I certainly think it safe

Do it on your SF pro with DIFFERENT tone control settings
on each channel (more treble on the vibrato channel).
Now engage the vibrato.
Beautiful.
It adds a "pinging" resonance to the "vibrato" effect
(which is REALLY tremolo).
Elmo' 7#9

[Chuck]

Worked fine on my AB763 Bandmaster. It REALLY beefed up the sound, and
with the Intensity on the Vibrato set to stun, but the speed set to 0,
it produced a very fat, very loud sound that was a thing of beauty.
Problem was WAY too much volume for most places.
Chuxk

[David Axt]

Post by guitarPsych
I remember reading a while back that some people, using a Fender Bassman
channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.
Is this something that can be done safely with a Deluxe Reverb? I assume
this just means you have more adjustments for tone and two tubes for
preamp stage. Let me know if that sounds incorrect.

It is safe on the Deluxe Reverb, but since the two channels are out of
phase, your sound may be thin.

-DA

[Jim]

Post by David Axt

Post by guitarPsych
I remember reading a while back that some people, using a Fender Bassman
channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.
Is this something that can be done safely with a Deluxe Reverb? I assume
this just means you have more adjustments for tone and two tubes for
preamp stage. Let me know if that sounds incorrect.

It is safe on the Deluxe Reverb, but since the two channels are out of
phase, your sound may be thin.
-DA

Yup, same for the Super Reverb.

[guitarPsych]

Why did they make it out of phase? Is that an oversight of some sort or
was there a valid reason to do so?

Post by David Axt

Post by guitarPsych
I remember reading a while back that some people, using a Fender Bassman
channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.
Is this something that can be done safely with a Deluxe Reverb? I assume
this just means you have more adjustments for tone and two tubes for
preamp stage. Let me know if that sounds incorrect.

It is safe on the Deluxe Reverb, but since the two channels are out of
phase, your sound may be thin.
-DA

[PMG]

Post by guitarPsych
I remember reading a while back that some people, using a Fender Bassman
channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.
Is this something that can be done safely with a Deluxe Reverb? I
assume this just means you have more adjustments for tone and two tubes
for preamp stage. Let me know if that sounds incorrect.

The channels in a Deluxe Reverb would be out of phase. It is possible
to modify the amp so that they're in phase. I've read descriptions of
what that involved, but it didn't sound like it's worth the effort to
me.

A lot of people love jumping the channels on Bassman heads, or with
certain Marshall heads, but I've never found it all that useful
personally, and it makes it more difficult to dial the sound in.

It certainly can add some body to your sound though.

You could get away with jumping the channels on a Tweed era Bassman
combo, Bassman heads, Superlead or JTM45 Marshalls, several other
amps. I think the Fenders that'll give you problems have reverb or
tremolo in one channel.

Pete

--
This sounds like a job for... making things up! --StrongBad

[Doug]

No need to modify the amp if they are out of phase, just put a pedal
that changes phase in the loop!

[wb]

The second channel w/reverb adds another stage
to the circuit which puts the signal through that
channel out of phase with the non-reverb channel.
There no harm in doing that, but I suspect it will
sound thinner.

Try it and let us know.

[RichCI]

Post by guitarPsych
I remember reading a while back that some people, using a Fender Bassman
channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.
Is this something that can be done safely with a Deluxe Reverb? I
assume this just means you have more adjustments for tone and two tubes
for preamp stage. Let me know if that sounds incorrect.

I used to do that with an old Bassman I had back in the '80s. I liked
the extra flexibility that two sets of tone controls gave me; there's
something very satisfying in a sacrilegious kind of way about playing
Motley Crue songs through such a fine piece of highly revered vintage
gear.

[RD Jones]

Post by guitarPsych
I remember reading a while back that some people, using a Fender Bassman
channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.

THIS IS NOT "BRIDGING" !

You might more correctly refer to this as "daisy chain"
inputs, or parallel inputs.

Bridging involves connecting the outputs of a stereo
amp (or two identical mono amps) together to get
double the wattage of either amp into a single load.
The inputs are run opposite polarity and the outputs
in series. The circuitry to do so is usually built-in,
but can be done externally.

Post by guitarPsych
Is this something that can be done safely with a Deluxe Reverb? I
assume this just means you have more adjustments for tone and two tubes
for preamp stage. Let me know if that sounds incorrect.

Yes, it's safe. You won't get the same result as with
an amp with more similar channels, like the Bassman.
If you want to try a cool trick with a Fender Xx Reverb
amp, pull the leads for the reverb pan (mark them for
in and out for later) and jumper the chassis jacks with
an RCA-RCA cable. "Use with caution", it'll give you
lots of gain and high boost. Too much reverb knob
will squeal.

rd

[Goldtop 69]

I don't know if it helps the sound, but back in the old days it was standard
procedure for "more sound" from a Bassman and I don't recall any amp
problems.

Post by guitarPsych
I remember reading a while back that some people, using a Fender Bassman
channel 1, input jack 1 : Guitar goes in here
channel 1, input jack 2 : short cable goes from here to...channel 2
channel 2, input jack 1 : the short cable from channel 1 goes in here.
Is this something that can be done safely with a Deluxe Reverb? I assume
this just means you have more adjustments for tone and two tubes for
preamp stage. Let me know if that sounds incorrect.