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Topic: 1966 Deluxe Reverb |
Dave Zirbel
From:
Sebastopol, CA USA
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Posted 15 Mar 2019 9:49 am |
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It doesn't leave the house much but I took it out last night to try out a new speaker. It sounded fabulous  but noticed the first channel is not as fat sounding as the second (Reverb) channel. I had the mod that puts reverb in both channels. Is this a normal characteristic for a Fender combo amp? Or maybe its just the preamp tube?
BTW the new speaker I used was a Scumback 65 watt alnico, modeled after a Vox Silver Bell(?) with some tweaks. A real good speaker for double duty steel and telecaster. Really liking it so far. He also offers a 100 watt model.
Dave
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Dave Zirbel-
Sierra S-10 (Built by Ross Shafer),ZB, Fender 400 guitars, various tube and SS amps
Last edited by Dave Zirbel on 15 Mar 2019 10:08 am; edited 2 times in total |
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Michael Butler
From:
California, USA
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Posted 15 Mar 2019 10:03 am
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probably depends upon what mods were actually done.
not sure what fat means, but, in a stock deluxe of that era the normal channel and vibrato channel are different. note that this doesn't bring in the difference between the two inputs of each channel.
you can try rolling the preamp tubes to see what happens.
i also have a 66! great amp!
play music!
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please see my Snakeskin's Virtual Music Museum below.
http://muscmp.wordpress.com/ |
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Mike Vallandigham
From:
Martinez, CA
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Posted 15 Mar 2019 1:06 pm
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Usually, channel 1 has less oomph than channel 2.
Due to the extra gain stages in channel 2.
But, I'm not sure how much of that (it at all) doing the "reverb on both channels" mod will negate. |
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Dave Zirbel
From:
Sebastopol, CA USA
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Posted 15 Mar 2019 1:09 pm
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Usually, channel 1 has less oomph than channel 2.
Due to the extra gain stages in channel 2. |
That's what I thought. I'll start with swapping the preamp tube.
Thanks guys
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Dave Zirbel-
Sierra S-10 (Built by Ross Shafer),ZB, Fender 400 guitars, various tube and SS amps |
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Michael Brebes
From:
Northridge CA
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Posted 16 Mar 2019 6:48 am
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If the mod was done properly, the two channels should be identical in tone and volume. If they sound different then one of three different things has happened, 1) a preamp tube is causing the difference, 2) someone modified the tone circuit on one channel, or 3) there is actually something wrong with the passive components in one of the channels.
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Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso
Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100 |
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Mike Vallandigham
From:
Martinez, CA
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Posted 19 Mar 2019 9:38 am
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Thanks Michael, that's a better reply than mine.
I have a '80 Vibrosonic Reverb. I've always wanted to try to "reverb on both channels" mod. I was unsure if it brought up the gain on channel 1. It's kinda sterile now.
Cheers! |
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Michael Brebes
From:
Northridge CA
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Posted 20 Mar 2019 4:35 pm
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What it does is tag the Normal channel into the same location where the Vibrato channel goes to the reverb and tremolo. So there should be no out-of phase or gain different since the channels are going through identical circuits before being summed together.
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Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso
Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100 |
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Erv Niehaus
From:
Litchfield, MN, USA
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Posted 21 Mar 2019 8:00 am
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I have a Vibrosonic Reverb that has reverb on both channels. I thought they came standard that way.
Erv |
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