MelWaldorf
Joined: Mar 03, 2006
Posts: 648
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Posted on Apr 08 2018 09:09 PM
Want a second mix level for your 6G15 style reverb? You can get it with a modified on/off footswitch - basically, instead of shunting the whole reverb signal to ground, you control how much to ground with a potentiometer. I made a demo, attached:
Last edited: Apr 08, 2018 21:09:37
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MelWaldorf
Joined: Mar 03, 2006
Posts: 648
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Posted on Apr 08 2018 09:14 PM
Note, circuit wise, this isn't the same as a second mix control. This controls how much of the reverb pan return signal is fed into the reverb recovery tube.
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synchro
Joined: Feb 02, 2008
Posts: 4425
Not One-Sawn, but Two-Sawn . . . AZ.
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Posted on Apr 09 2018 12:15 AM
It sounds pretty much the same, so I’d say it’s a fair call. It’s got me thinking, an old Wah Pedal could be converted to such use fairly easily and give you a real-time mix comtrol for reverb. Now, we need a way to make it go to 11.
— The artist formerly known as: Synchro
When Surf Guitar is outlawed only outlaws will play Surf Guitar.
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Tqi
Joined: Dec 07, 2014
Posts: 1222
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Posted on Apr 09 2018 02:16 AM
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Last edited: Feb 02, 2024 13:34:02
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MelWaldorf
Joined: Mar 03, 2006
Posts: 648
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Posted on Apr 09 2018 02:32 AM
Tqi, yup, it's basically the stock footswitch with a 10K pot in series with the on/off switch. I thought about making an expression pedal - you could do that, set the on board mix to 10 and control your reverb level with the pedal.
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Gilette
Joined: May 04, 2014
Posts: 734
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Posted on Apr 09 2018 02:37 AM
Great idea! You could add a true on/off switch to complete the circuit. And it could work on a Surfy Bear too! Where is my toolbox?...
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bjoish
Joined: Jul 06, 2010
Posts: 596
Stockholm
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Posted on Apr 09 2018 03:02 AM
Yes, a very good idea!
Not many surf guitarists want to disable the reverb, a second mix level is more usable!
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Tqi
Joined: Dec 07, 2014
Posts: 1222
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Posted on Apr 09 2018 03:31 AM
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Last edited: Feb 02, 2024 13:33:57
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Gilette
Joined: May 04, 2014
Posts: 734
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Posted on Apr 09 2018 04:52 AM
I've done some drawing and came up with a possible schematic for this. The only thing I'm not sure of is the value of the pot. 10k seems a bit low to me so maybe 100k or even 220k could have a more significant effect. I'll experiment with that later.
It occurred to me it would be handy to have a few LEDs as indicators for both switches, so I added a 9 volt battery to power these. Most footswitches come with 9 connections nowadays so plenty of room for such an addition. The battery should last for a very very long time. More later.
Last edited: Apr 09, 2018 04:52:57
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synchro
Joined: Feb 02, 2008
Posts: 4425
Not One-Sawn, but Two-Sawn . . . AZ.
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Posted on Apr 09 2018 08:04 AM
bjoish wrote:
Yes, a very good idea!
Not many surf guitarists want to disable the reverb, a second mix level is more usable!
Agreed. When I was using reverb, and nothing but reverb, I was adjusting the mix with every song.
— The artist formerly known as: Synchro
When Surf Guitar is outlawed only outlaws will play Surf Guitar.
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LittleKahunaCraig
Joined: Jan 09, 2008
Posts: 385
Orange County, CA
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Posted on Apr 09 2018 08:15 AM
Mel,
What a cool idea, I could go from Baja to Hawaii Five-0 different levels of reverb with a footswitch! Yes Please!
— Craig Skelly
Little Kahuna
www.littlekahunamusic.com
The Breakaways
The Curl Riders
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DannySnyder
Joined: Mar 02, 2006
Posts: 11046
Berkeley, CA
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Posted on Apr 09 2018 08:32 AM
Mel is a genius. I've been coming up with different solutions to the problem of switching from heavy drip to moderate reverb ever since I took up surf guitar, with varying degrees of success. To think the solution was so simple.
And then Mel just shares it with the world instead of trying to sell it. He's the Jonas Salk of the surf music community!
— Danny Snyder
"With great reverb comes great responsibility" - Uncle Leo
Playing keys and guitar with Combo Tezeta
Formerly a guitarist in The TomorrowMen and Meshugga Beach Party
Latest surf project - Now That's What I Call SURF
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synchro
Joined: Feb 02, 2008
Posts: 4425
Not One-Sawn, but Two-Sawn . . . AZ.
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Posted on Apr 09 2018 08:34 AM
DannySnyder wrote:
Mel is a genius. I've been coming up with different solutions to the problem of switching from heavy drip to moderate reverb ever since I took up surf guitar, with varying degrees of success. To think the solution was so simple.
And then Mel just shares it with the world instead of trying to sell it. He's the Jonas Salk of the surf music community!
I think he’s overdue for that Noebel Prize.
— The artist formerly known as: Synchro
When Surf Guitar is outlawed only outlaws will play Surf Guitar.
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synchro
Joined: Feb 02, 2008
Posts: 4425
Not One-Sawn, but Two-Sawn . . . AZ.
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Posted on Apr 09 2018 10:49 AM
synchro wrote:
DannySnyder wrote:
Mel is a genius. I've been coming up with different solutions to the problem of switching from heavy drip to moderate reverb ever since I took up surf guitar, with varying degrees of success. To think the solution was so simple.
And then Mel just shares it with the world instead of trying to sell it. He's the Jonas Salk of the surf music community!
I think he’s overdue for that Nobel Prize.
— The artist formerly known as: Synchro
When Surf Guitar is outlawed only outlaws will play Surf Guitar.
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synchro
Joined: Feb 02, 2008
Posts: 4425
Not One-Sawn, but Two-Sawn . . . AZ.
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Posted on Apr 09 2018 10:49 AM
synchro wrote:
synchro wrote:
DannySnyder wrote:
Mel is a genius. I've been coming up with different solutions to the problem of switching from heavy drip to moderate reverb ever since I took up surf guitar, with varying degrees of success. To think the solution was so simple.
And then Mel just shares it with the world instead of trying to sell it. He's the Jonas Salk of the surf music community!
I think he’s overdue for that Nobel Prize.
— The artist formerly known as: Synchro
When Surf Guitar is outlawed only outlaws will play Surf Guitar.
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Tqi
Joined: Dec 07, 2014
Posts: 1222
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Posted on Apr 09 2018 11:09 AM
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Last edited: Feb 02, 2024 13:33:51
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MelWaldorf
Joined: Mar 03, 2006
Posts: 648
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Posted on Apr 09 2018 12:05 PM
The 10K value is based both on experimentation and the location in the circuit - it's a path to ground at the reverb pan return. I started testing with 500K pots and nothing happens over most of the sweep. I tried 250Ks and that did the same. The pan return resistance is 2.25K, so I found the pot in my parts bin with the closed value above 2.25K. Also, it's important to use linear vs audio sweep for even effect.
Remember, the mix control on the tank still functions; this pedal is subtractive from that.
The wiring is very simple as you can see in the photo below. Drilling out the pedal case took more time.
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Gilette
Joined: May 04, 2014
Posts: 734
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Posted on Apr 09 2018 12:26 PM
MelWaldorf wrote:
The 10K value is based both on experimentation and the location in the circuit - it's a path to ground at the reverb pan return. I started testing with 500K pots and nothing happens over most of the sweep. I tried 250Ks and that did the same. The pan return resistance is 2.25K, so I found the pot in my parts bin with the closed value above 2.25K. Also, it's important to use linear vs audio sweep for even effect.
Remember, the mix control on the tank still functions; this pedal is subtractive from that.
The wiring is very simple as you can see in the photo below. Drilling out the pedal case took more time.
Good call. 10k it is.
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MelWaldorf
Joined: Mar 03, 2006
Posts: 648
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Posted on Apr 09 2018 08:26 PM
Should have thought of this earlier - the vib/rev footswitch from the combo amps are easy to convert, too.
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MelWaldorf
Joined: Mar 03, 2006
Posts: 648
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Posted on Apr 09 2018 08:29 PM
Here's a look inside. I used the shielded reverb part of the cable and swappped in the 10K pot in place of the footswitch.
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