an effects loop instead the spring reverb ?

nadojaz · 7th January 2012, 08:52 AM

Hello, I've a guitar amp with tubes. Epiphone Valve senior.
It doesn't have an effects loop.

So, is it possible to disconnect the spring reverb, and to put the pedals instead of it without electronic modification ?

Printer2 · 7th January 2012, 12:06 PM

Schematic and some work on the loop.

Valve Senior is in the HOUSE! - Gibson Guitar Board - Page 5

I don't see why not.

pinkjimiphoton · 24th February 2012, 03:39 PM

well, you can definitely use the RETURN from the reverb to mix effects in..

the send portion you're gonna need to play with the circuitry a little bit most likely, as it's taking the send to the verb right off the plate.

maybe something as simple as adding a blocking cap.

doozerdave · 1st March 2012, 12:17 PM

You would probably want to make it a cathode follower to drive lower impedance loads. Also the level will need to be lower for the effects inputs, guitar level to line level range. Keep in mind that the reverb mixing is just that, mixing. Effects send/return puts the effects in-line and there isn't a mix with the original signal in the return amp, it's just the effects output.

I'm finishing up an amp build and trying to come up with a way to balance the effects send level, but it looks like the only good option is to have an send level control. It's annoying because the return amp will need more gain for low level effects. Master volume is positioned right before the return amp. This is a helpful page for the topic:
The Valve Wizard -Cathode Follower

firechief · 1st March 2012, 02:00 PM

That whole valve wizard page is very well done. How to design valve guitar amplifiers
No I am not Affiliated with them, I just want to pass a good thing around.

doozerdave · 1st March 2012, 02:07 PM

Yes, very well done. I've been using his site a lot. I might buy his books (or put them on my birthday wish list).

7th January 2012, 08:52 AM	#1
nadojaz diyAudio Member Join Date: Feb 2010	an effects loop instead the spring reverb ? Hello, I've a guitar amp with tubes. Epiphone Valve senior. It doesn't have an effects loop. So, is it possible to disconnect the spring reverb, and to put the pedals instead of it without electronic modification ?

1st March 2012, 02:00 PM	#5
firechief diyAudio Member Join Date: Sep 2008 Location: Near Seattle Wa	That whole valve wizard page is very well done. How to design valve guitar amplifiers No I am not Affiliated with them, I just want to pass a good thing around. __________________ "You can keep your insurance baby nothing is guaranteed" -Tom Petty

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7th January 2012, 12:06 PM	#2
Printer2 diyAudio Member Join Date: Apr 2010	Schematic and some work on the loop. Valve Senior is in the HOUSE! - Gibson Guitar Board - Page 5 I don't see why not.

24th February 2012, 03:39 PM	#3
pinkjimiphoton diyAudio Member Join Date: Feb 2012 Location: one of them replacement manchesters	well, you can definitely use the RETURN from the reverb to mix effects in.. the send portion you're gonna need to play with the circuitry a little bit most likely, as it's taking the send to the verb right off the plate. maybe something as simple as adding a blocking cap.

1st March 2012, 12:17 PM	#4
doozerdave diyAudio Member Join Date: Feb 2012 Location: Kitchener, Ontario	You would probably want to make it a cathode follower to drive lower impedance loads. Also the level will need to be lower for the effects inputs, guitar level to line level range. Keep in mind that the reverb mixing is just that, mixing. Effects send/return puts the effects in-line and there isn't a mix with the original signal in the return amp, it's just the effects output. I'm finishing up an amp build and trying to come up with a way to balance the effects send level, but it looks like the only good option is to have an send level control. It's annoying because the return amp will need more gain for low level effects. Master volume is positioned right before the return amp. This is a helpful page for the topic: The Valve Wizard -Cathode Follower

1st March 2012, 02:07 PM	#6
doozerdave diyAudio Member Join Date: Feb 2012 Location: Kitchener, Ontario	Yes, very well done. I've been using his site a lot. I might buy his books (or put them on my birthday wish list).

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