Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: fossilshark on September 25, 2018, 04:22:04 am

Title: Reverb
Post by: fossilshark on September 25, 2018, 04:22:04 am

I want to build a spring reverb unit to go with my LA60BL clone, but I've never done anything with reverb before. I would like to go full tube but I'm open to opamps. Basically I'm asking for a schematic for something I'd be able to use after my positive ground boost into my amp. Any input is appreciated.

Title: Re: Reverb
Post by: sluckey on September 25, 2018, 05:20:33 am

Got a schematic? What's a "positive ground boost"?

Title: Re: Reverb
Post by: fossilshark on September 25, 2018, 06:18:16 am

Rangemaster treble booster. I dont know if it will work with SS for the same reason positive ground pedals cant be connected to negative ground pedals.

Title: Re: Reverb
Post by: sluckey on September 25, 2018, 06:39:12 am

Look at the 6G15

Title: Re: Reverb
Post by: tubenit on September 25, 2018, 07:34:01 am

Sluckey gave you good advice.

IF you want to explore some solid state options, then the 3rd page on this "one tube reverb thread" has some options to consider.

https://el34world.com/Forum/index.php?topic=7957.0

With respect, Tubenit

Title: Re: Reverb
Post by: fossilshark on September 25, 2018, 10:03:57 am

Could I use the single tube circuit like a pedal as is?

Title: Re: Reverb
Post by: sluckey on September 25, 2018, 10:25:15 am

no

Title: Re: Reverb
Post by: tubenit on September 26, 2018, 04:55:44 am

IF your amp is similar to a Marshall Plexi & it had a simple passive effects loop, you could use something like this:

http://fuchsaudiotechnology.com/effects/verbrator/

Title: Re: Reverb
Post by: tubenit on September 26, 2018, 05:03:44 am

Some years ago, I made an active FX & Reverb unit that plugged into a passive effects loop.  It sound "OK" but nothing really great.

AND ……….. it still needed a full sized reverb tank with it.  So, it was NOT just a pedal that plugged in.  It was a unit that plugged into the passive FX loop and then had to have a full sized reverb tank plugged into it.

I used it for a while and then converted it into something else.

https://el34world.com/Forum/index.php?topic=10624.0

With respect, Tubenit

Title: Re: Reverb
Post by: fossilshark on September 29, 2018, 09:06:58 pm

The 6G15 has 120vdc on the output stage plate, is that safe to go into the front end of a plexi style amplifier? I mean the input stage of my amp probably has twice that on the plate. If so thats pretty much what im looking for.

Title: Re: Reverb
Post by: sluckey on September 29, 2018, 11:31:26 pm

Quote from: fossilshark on September 29, 2018, 09:06:58 pm

The 6G15 has 120vdc on the output stage plate, is that safe to go into the front end of a plexi style amplifier? I mean the input stage of my amp probably has twice that on the plate. If so thats pretty much what im looking for.

So? The only thing that appears at the output jack is an instrument level signal.