#1
Hey Everyone,
I just bought a new amp, so I have no use for my old Fender Performer 1000 head. It has a spring reverb tank which has always sounded good to me. I also have a home-made footswitch with two buttons (not in my apartment ATM, so I can't post pics). Would it be worth it to steal the reverb tank and build a Fender Spring Reverb pedal? What sort of things would be involved? I'm new to gear building, so any advice would be great
Fender American Vintage '62 Stratocaster
Gibson Les Paul Custom
TC Electronic Polytune
Danelectro Blue Paisley
EHX Big Muff Pi w/ Tone Wicker
Dunlop Crybaby
EHX Deluxe Memory Boy
Egnater Tweaker

Quote by Jackal58
Yer pretty fly for a Canadian.
#2
Anyone?
Fender American Vintage '62 Stratocaster
Gibson Les Paul Custom
TC Electronic Polytune
Danelectro Blue Paisley
EHX Big Muff Pi w/ Tone Wicker
Dunlop Crybaby
EHX Deluxe Memory Boy
Egnater Tweaker

Quote by Jackal58
Yer pretty fly for a Canadian.
#3
im not familiar with that particular amp, just fyi.

you'd have to take out the entire reverb driver circuit and the pedal would have to be connected paralell to the signal path (nearly all pedals are in series with the signal path). the signal path would need a resistor in series with it or else you'd only have the dry signal. you cant put the circuit in series with the signal path or else you'll get 100% wet signal.

the way it is connected up in the amp is paralell to the preamp output and power amp input. there is probably a 10k-ish resistor across the send and return of the reverb driver circuit (which means it is in series with the preamp out and power amp in). the reverb pot is just a volume control for the wet signal. it's not a mixer.

in other words, this is not a practical solution for a reverb pedal since all you'd be doing is taking the reverb circuit out of the amp and putting it in a seperate box. you'd still have to connect it in the same way so you may as well just leave it alone.
#4
Quote by Invader Jim

in other words, this is not a practical solution for a reverb pedal since all you'd be doing is taking the reverb circuit out of the amp and putting it in a seperate box. you'd still have to connect it in the same way so you may as well just leave it alone.


There would be no way to have my pedal (literally just 2 switches right now, not hooked up to anything) function as an on/bypass and run the reverb through my amp's FX loop?

If not, no worries. Love the reverb, don't need the amp. Figured it could be worth a shot
Fender American Vintage '62 Stratocaster
Gibson Les Paul Custom
TC Electronic Polytune
Danelectro Blue Paisley
EHX Big Muff Pi w/ Tone Wicker
Dunlop Crybaby
EHX Deluxe Memory Boy
Egnater Tweaker

Quote by Jackal58
Yer pretty fly for a Canadian.
#5
I suppose it's worth noting that Fender did actually make a Reverb Unit (which might also be of interest to you considering your avatar - Frusciante used one around the BTW era).

http://www.schematicheaven.com/fenderamps/reverb_6g15_schem.pdf
Here's a schematic, it's tube driven as well. But that also means that you need to find a PSU which is usually quite costly.

You should try a solid state one maybe.
http://www.solorb.com/elect/musiccirc/reverb/index.html
http://www.paia.com/ProdArticles/Images/hotspsch.jpg
http://sound.westhost.com/project34.htm

Quote by Jimmy_Page_Zep
There would be no way to have my pedal (literally just 2 switches right now, not hooked up to anything) function as an on/bypass and run the reverb through my amp's FX loop?
Well, there is always a way, but whether it's worth it or not is a different question. At the most simplest, with an ON/OFF switch, it would either be 100% wet or 100% dry - which isn't everybody's cup of tea.
I have a ponytail fetish.
..And a labcoat fetish. SCIENCE!
Last edited by AntiG3 at Jul 18, 2010,
#6
Quote by AntiG3
I suppose it's worth noting that Fender did actually make a Reverb Unit (which might also be of interest to you considering your avatar - Frusciante used one around the BTW era).


http://www.schematicheaven.com/fenderamps/reverb_6g15_schem.pdf
Here's a schematic, it's tube driven as well. But that also means that you need to find a PSU which is usually quite costly.


Yea, I've seen these before, and have seen pics of them in Froosh's pedalboard. It wouldn't be worth it for me to make a tube driven reverb. I might as well just buy the Fender unit for the money and trouble it would cost me to build one.

Quote by AntiG3

You should try a solid state one maybe.
http://www.solorb.com/elect/musiccirc/reverb/index.html
http://www.paia.com/ProdArticles/Images/hotspsch.jpg
http://sound.westhost.com/project34.htm

Well, there is always a way, but whether it's worth it or not is a different question. At the most simplest, with an ON/OFF switch, it would either be 100% wet or 100% dry - which isn't everybody's cup of tea.


100% wet/dry wouldn't be ideal for me. Looks like I was being a little too ambitious with this project . Too bad though, that reverb unit sounds great. Thanks for your help though!
Fender American Vintage '62 Stratocaster
Gibson Les Paul Custom
TC Electronic Polytune
Danelectro Blue Paisley
EHX Big Muff Pi w/ Tone Wicker
Dunlop Crybaby
EHX Deluxe Memory Boy
Egnater Tweaker

Quote by Jackal58
Yer pretty fly for a Canadian.
#7
My friend and I really like these sort of projects. He's an electrical engineer, so he's got a good knowledge of this sort of stuff. We really want to give this a shot.

I've been reading up a bit more on this, and on other forums people have said you can easily make a reverb unit by placing a preamp after the reverb tank. This is essentially what my reverb tank looks like:

http://www.tdpri.com/telephoto/data/500/IMGP9276.JPG

This amp has a S.S. poweramp with a tube preamp distortion channel. If I gutted the amp, took out the tube pre-amp, put it behind the reverb tank, and used the amp's reverb blend pot, could we make this project work?
Fender American Vintage '62 Stratocaster
Gibson Les Paul Custom
TC Electronic Polytune
Danelectro Blue Paisley
EHX Big Muff Pi w/ Tone Wicker
Dunlop Crybaby
EHX Deluxe Memory Boy
Egnater Tweaker

Quote by Jackal58
Yer pretty fly for a Canadian.
#8
You will need a transformer to couple the tube driver to the reverb tank if you want to go that direction. The reverb tank likely has an impedance of around 10 ohms or so... which is not a good impedance for a tube to see on its anode.

So you can buy a fairly cheap reverb transformer that fender uses, its around 15 dollars or so, and design around that. A 12ax7 is not the ideal tube to use to drive the tank though. It needs a much higher impedance than what the tank will give you on its plate in order to run safely. A 12AT7 on the other hand will easily handle this, especially if you parallel the triode. You could then run the output of the reverb tank back into a tube or equivalent transistor/ic recovery stages.

The Fender reverb unit that was posted would be a very good use for the tank, but it will cost a lot more than doing something like the westhost link.

To be honest, if your going to use a tube to drive the reverb tank you won' spend that much more money to use a tube for the recovery stage.

You could always look up a blackface deluxe and use that sort of reverb circuit if you want something simpler than the other fender link above.
Last edited by XgamerGt04 at Jul 19, 2010,