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Topic: The way Jimmy Day hooked up his tube amp and more! |
Keith Hilton
From:
248 Laurel Road Ozark, Missouri 65721
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Posted 15 Apr 2009 4:30 pm |
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 Jimmy Day used to used both channels on a Fender tube amp. I have watched him plug into one channel, then run a jumper guitar cord to the other channel. This meant he was playing through both channels on the Fender amp. I have been thinking about something: What if you used a DD3 Delay on the first channel, then used a 2nd DD3 Delay set on a different delay volume and time for the other channel? Seems to me this might produce a really fat sound. Has anyone tried this or am I the only nut out there looking for the perfect sound? I am presently using a 1996 Fender Vibrosonic 100 watt tube amp, with 15 inch speaker, and loving the sound I am getting using the guitar channel, with the fat switch turned off. I really don't see any electronic problem running to both channels, even with two DD3 Delay units. If someone sees a problem, speak up! I would want the Delay units and Fender amp both plugged into the same ground plane, for obivous reasons. |
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Ken Fox
From:
Nashville GA USA
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Posted 15 Apr 2009 4:57 pm
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| As I recall the amp you have has reverb on both channels. That means both channels are in phase. The older Fender amps had a dry channel with 2 gain stage and a wet channel with 3 gain stages. That means those amps (such as the Twin Reverb, Older Vibrasonic, etc) have the channels 180 degrees out of phase with each other. |
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Keith Hilton
From:
248 Laurel Road Ozark, Missouri 65721
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Posted 15 Apr 2009 7:37 pm
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Ken, it was the late 70s or early 80s when I saw Jimmy Day doing this. If I remember correctly, Jimmy was playing through a Fender Twin when he was going into both channels. My Vibrosonic was made in 1996 by Fender's Custom Shop in Oregon. Sam Marshall told me there were only 150 of them made in that version at that time. My Vibrosonic has a steel side and a guitar side. I don't care for the steel side. I like the sound of my steel guitar through the guitar side with the fat switch off.
As you know, it would be pretty easy to put a phaze inverter on one side, built from a unity gain op amp.
Back to Jimmy Day. Ken I know I saw him using a jumper, so he was playing through both channels. I remember asking Jimmy about playing through both channels, but I can't remember the details of what Jimmy said. I can assure you Jimmy was getting a wonderful sound out of that Fender tube amp. |
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Keith Hilton
From:
248 Laurel Road Ozark, Missouri 65721
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Posted 15 Apr 2009 8:19 pm
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| Ken, I just went to the shop and looked at my Vibrosonic. I can't swear Jimmy Day used a jumper from channel one to channel two. One channel has two places you can plug in, numbered 1 and 2. Maybe Jimmy was plugging in to both 1 and 2, on just one channel. Would there be any sonic value to plugging into both 1 and 2 on just one channel? Jimmy did not use a delay way back then. Ken, how about the two different delays set different, both going into the same channel, only one going in hole 1 and the other going in hole 2. Wonder what that would sound like? I can't help myself, I just keep asking myself--WHAT IF? |
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Ken Fox
From:
Nashville GA USA
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Posted 16 Apr 2009 4:24 am
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The amp you have has both channels in phase. A common mod on Twins and other Fender reverb amps is to move the channel 1 output frpm the 220K mixing resistor and moving it to the junction of the 10pf and 3.3Meg resistor. That adds reverb tremolo and an additional gain stage to channel one as well as putting it in phase with channel two.
Using both inputs would provide addition padding of the input signal.
Using both channels on a standard Twin with an echo (dry to one side and the repeat to the other channel) would provide an out of phase echo signal. Not sure how that would sound! |
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Donny Hinson
From:
Glen Burnie, Md. U.S.A.
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Posted 16 Apr 2009 5:21 am
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| Ken Fox wrote: |
Using both channels on a standard Twin with an echo (dry to one side and the repeat to the other channel) would provide an out of phase echo signal. Not sure how that would sound! |
Back in the '60s (before phase-shifter pedals), I used both channels in my Twin reverb to get the "phase shifting" sound by wiring my volume pedal to sweep from one channel to the other. I also occasionally used just the jumper to get some tones you just couldn't get otherwise.
Without the "sweeping" between the channels, all you really notice is a drastic tone change.  |
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Keith Hilton
From:
248 Laurel Road Ozark, Missouri 65721
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Posted 16 Apr 2009 7:44 am
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| Donny, is the tone change good, bad, or interesting? |
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John Billings
From:
Ohio, USA
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Posted 16 Apr 2009 8:06 am
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Keith,
"plugging in to both 1 and 2, on just one channel."
I don't think you could do that with a jumper cable. You'd need two cables from your volume pedal. |
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