tonetti
Joined: Aug 20, 2008
Posts: 654
California
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Posted on Feb 17 2009 01:22 PM
My Dad and I have decided to build a reverb unit based on the fender 6g15 reverb unit. We plan to replicate the 6G15 Schematic. But we wanted some opinions from the surf masters here, before we started ordering parts. Do you guys recommend any specific mods/parts we should be thinking about swapping, or should we build it to the vintage specs? I just dont want to build it, and then have to go back and make changes later.
Any suggestions would be greatly appreciated. I hope to keep everyone filled in on the build progress, and provide sound samples when it is finished. If this first one goes well, we are going to build a second one, Then My Dad and I can both be fully reverberated!!!
Last edited: Feb 17, 2009 17:14:54
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MilkManX
Joined: Jan 16, 2009
Posts: 65
Tucson AZ USA
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Posted on Feb 17 2009 02:32 PM
It might be cheaper just to order the kit. Maybe make your own "box" but use the kit for the rest.
http://taweber.powweb.com/store/kits_weber.htm
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LHR
Joined: Aug 23, 2006
Posts: 2123
The jungle
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Posted on Feb 17 2009 02:53 PM
One mod you could always try is to replace the diode rectifier with a tube. It has negligible affect on the sound but will spare the power stage some wear. (Consider for a moment the absence of a standby switch on the original Fender design.)
Another is the addition of a vibrato into the circuit after the Weber kit, and others.
Also, look into Hoffman parts (or kit) as well.
— SSIV
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tonetti
Joined: Aug 20, 2008
Posts: 654
California
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Posted on Feb 17 2009 04:07 PM
MilkManX
It might be cheaper just to order the kit. Maybe make your own "box" but use the kit for the rest.
http://taweber.powweb.com/store/kits_weber.htm
We aren't at all concerned about the cost, we already fabricated the Chassis, and the Cabinet. Most of the parts we already have (reverb tank, tubes, pots,etc..) All we really need to order are the caps, transformers, and that sort of thing. On the other hand we are willing to purchase what ever we need to build a great sounding reverb unit.
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tonetti
Joined: Aug 20, 2008
Posts: 654
California
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Posted on Feb 17 2009 04:10 PM
LHR
One mod you could always try is to replace the diode rectifier with a tube. It has negligible affect on the sound but will spare the power stage some wear. (Consider for a moment the absence of a standby switch on the original Fender design.)
Another is the addition of a vibrato into the circuit after the Weber kit, and others.
Also, look into Hoffman parts (or kit) as well.
Thanks! These are the kind of suggestions we were looking for.
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zak
Joined: Sep 24, 2007
Posts: 2728
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Posted on Feb 17 2009 04:18 PM
This post has been removed by the author.
Last edited: Sep 23, 2009 22:13:35
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JetBlue
Joined: May 30, 2006
Posts: 746
Cool, CA
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Posted on Feb 17 2009 04:25 PM
The vintage, reissue, and Weber schematics are all nearly identical. The very small differences would not affect the sound. Just use quality parts and have at it. I think you'll find a greater difference in sound among different reverb pans and, to a lesser extent, tubes. Those are things you can swap easily after the unit is built.
I didn't do it on mine, but the isolated circuit ground used on the reissue (two diodes back to back and in parallel with a 15 ohm resistor) is a mod I would make on future builds. It allows you to use a 3 prong cord and have the chassis earth grounded via the power cord without ground loop hum. Without it, the chassis will be grounded only through the guitar cord via the amp (which may or may not be earth grounded).
— Don
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JetBlue
Joined: May 30, 2006
Posts: 746
Cool, CA
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Posted on Feb 17 2009 04:28 PM
A reverb unit doesn't really have a power stage. It's all low current...just a pre-amp. The diode rectifiers will be cheaper, more durable, and will take up less space.
— Don
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cambeezy
Joined: Jun 26, 2007
Posts: 399
Cleveland, Ohio
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Posted on Feb 17 2009 05:06 PM
tonetti
Any suggestions would be greatly appreciated appreciated.
Several here, incl myself have noted the circuit is splashier when you use a blue lamp jewel. 
Have fun and we want pics and sound samples when you're done.
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LHR
Joined: Aug 23, 2006
Posts: 2123
The jungle
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Posted on Feb 17 2009 07:24 PM
JetBlue: Of course the 6G15 has a power stage.
Zak: I am referring to the power tube here. No matter, a rectifier is really unimportant, and only slightly interesting in this circuit.
— SSIV
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eddiekatcher
Joined: Mar 14, 2006
Posts: 2778
Atlanta, GA
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Posted on Feb 17 2009 08:37 PM
The reverb unit does indeed have an "output" (power stage). For the most part the 6g15 reverb is Fender Champ amp that uses a transformer to knock the output down of the 6V6 (6k6) to a level that will safely drive the springs in the tank (instead of a speaker). Then the spring recovery and original dry signal are mixed together behind the output stage of a 12ax7, which again returns the output stage to approximately your guitar's output level where it is fed into your amps input. (at almost unity gain).
Reverbs, hahahaha
ed
— Traditional........speak softly and play through a big blonde amp. Did I mention that I still like big blonde amps?
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JetBlue
Joined: May 30, 2006
Posts: 746
Cool, CA
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Posted on Feb 18 2009 12:22 PM
I guess "power" is relative. It does have an output (power) stage but at 6-7W, not one that needs the protection of a standy swith, IMO.
This place needs more reverb threads!
— Don
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JakeDobner
Joined: Feb 26, 2006
Posts: 12159
Seattle
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Posted on Feb 18 2009 12:39 PM
You should put some dice on it, then you can play rockabilly with it.
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JakeDobner
Joined: Feb 26, 2006
Posts: 12159
Seattle
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Posted on Feb 18 2009 12:41 PM
And in all seriousness, since cost doesn't necessarily matter. I'd suggest getting a vintage Gibbs reverb pan. I really strongly prefer them over the Accutronics tanks.
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eddiekatcher
Joined: Mar 14, 2006
Posts: 2778
Atlanta, GA
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Posted on Feb 18 2009 01:12 PM
Considering I've never had an "output (power)" tube failure in a reverb unit (and I've owned them since 1966), I'd guess the standby switch option is probably not a requirement.
ed
— Traditional........speak softly and play through a big blonde amp. Did I mention that I still like big blonde amps?
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tonetti
Joined: Aug 20, 2008
Posts: 654
California
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Posted on Feb 18 2009 01:42 PM
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JakeDobner
Joined: Feb 26, 2006
Posts: 12159
Seattle
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Posted on Feb 18 2009 01:48 PM
I don't believe so. The ones for reverb units were smaller, I'm fairly certain.
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DannySnyder
Joined: Mar 02, 2006
Posts: 11077
Berkeley, CA
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Posted on Feb 18 2009 02:28 PM
tonetti
JakeDobner
And in all seriousness, since cost doesn't necessarily matter. I'd suggest getting a vintage Gibbs reverb pan. I really strongly prefer them over the Accutronics tanks.
Would this be a correct Gibbs tank?
http://cgi.ebay.com/Gibbs-Reverb-tank-for-deluxe-reverb-Twin-Super-Reverb_W0QQitemZ260323685739QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item260323685739&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50
Tonetti, most of the tanks look the same. What's critical is the impedence of the input and output transducers. See my thread here:
http://www.surfguitar101.com/modules.php?name=Forums&file=viewtopic&t=7914&highlight=gibbs
— Danny Snyder
"With great reverb comes great responsibility" - Uncle Leo
I am now playing trumpet with Prince Buster tribute band 'Balzac'
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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tonetti
Joined: Aug 20, 2008
Posts: 654
California
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Posted on Feb 18 2009 02:55 PM
DannySnyder
tonetti
JakeDobner
And in all seriousness, since cost doesn't necessarily matter. I'd suggest getting a vintage Gibbs reverb pan. I really strongly prefer them over the Accutronics tanks.
Would this be a correct Gibbs tank?
http://cgi.ebay.com/Gibbs-Reverb-tank-for-deluxe-reverb-Twin-Super-Reverb_W0QQitemZ260323685739QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item260323685739&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50
Tonetti, most of the tanks look the same. What's critical is the impedence of the input and output transducers. See my thread here:
http://www.surfguitar101.com/modules.php?name=Forums&file=viewtopic&t=7914&highlight=gibbs
Danny- Thanks for the thread link, this will be very helpful, I see that the one I mentioned is 1ohm & Aprox 178 ohm. Our goal is to replicate an early fender tank, as close as possible, and I think the right tank will prove to be vital, to match the sound.
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DannySnyder
Joined: Mar 02, 2006
Posts: 11077
Berkeley, CA
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Posted on Feb 18 2009 03:30 PM
good luck Tonetti, keep in mind there's no guarantees that it'll sound as good as you want just because it's vintage. I'd arrange to be able to return it if you're not satisfied before you purchase it.
— Danny Snyder
"With great reverb comes great responsibility" - Uncle Leo
I am now playing trumpet with Prince Buster tribute band 'Balzac'
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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