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Post subject: A/B footswitch for DRRI
Posted: Sun Dec 05, 2010 11:11 am
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HI Just picked up my new deluxe reverb and was wondering if you can use a a/b footswitch to change from the normal channel to the vibrato channel? And if so does anyone have any recomendations for a a/b box . Thanks


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Posted: Sun Dec 05, 2010 11:44 am
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This is the one I use and recommend......

http://guitars.musiciansfriend.com/prod ... sku=153931

You'll need to re-phase one of the output signals from this device using the on-board "180 degree" switch.

It works very well, it's built like a tank, and it's the best $75 I ever spent on a stompbox.

Best of luck, HTH

Arjay

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Posted: Sun Dec 05, 2010 11:52 am
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Thanks for the info retroverbial. Excuse my lack of know how I am new at the electric side of things. What do You mean by re-phase one of the output signals using the on board 180 degree swith Thanks again


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Posted: Sun Dec 05, 2010 12:47 pm
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The DRRI amp "flips" the reverb channel signal 180 degrees from the normal channel's orientation prior to both of them being summed (mixed) as they hit the phase inverter stage of the amp. Thus, if both channels are used simultaneously with a single signal (ie: one guitar) some of the frequency response at either extreme (both the bass and the treble) is attenuated. It makes for a somewhat "honky" and abbreviated tone. All dual-channel vintage Fender amps with reverb (and the re-issues of same) have this wiring condition. I use the Radial Tonebone with my Twin Reverbs -- one vintage, one re-issue -- as well for this very reason.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Posted: Sun Dec 05, 2010 5:06 pm
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So all I have to do is flip the 180 switch that is on the a/b footswitch? Thanks again!


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Posted: Sun Dec 05, 2010 6:00 pm
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Indeed, it's as simple as that.

You can also use the Radial Tonebone to run two amps in tandem in similar fashion. Use the "isolation" switch on the unit to ensure that there are no hum or ground loop problems between the two amps.

As with any signal-handling device, I recommend only high-quality shielded instrument cables to connect your guitar and any other stompboxes together.

HTH, have a ball with the new amp!

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Posted: Sun Dec 05, 2010 6:23 pm
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Thanks for all the help Retroverbial.


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Posted: Mon Dec 06, 2010 8:16 pm
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If all you plan to do is switch between the two channels then another alternative might be for you to build your own a/b switch. If you are handy with a soldering iron Fulltone has a great page on how to build a a/b box. I built two of these for less than $20 by using electrical box housings from home depot. I've had great success with them and they have never given me any problems.
Here is the link:
http://www.fulltone.com/qaframe.html
Good luck.

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Posted: Mon Dec 06, 2010 8:24 pm
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Hey retroverbial congrats on your new status as "Rock Star." I aspire to one day attain such esteemed status and company.


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Posted: Mon Dec 06, 2010 10:28 pm
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Unadan wrote:
Hey retroverbial congrats on your new status as "Rock Star."


PFFFFFFFT!

Nothing but hype.

As Mulder would say......trust no one.

BWAHAHAHAHAHA

Arjay

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