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previous: JaySG sorry about resurrecting this, howe... -- 10/19/2000 5:51 PM

Re: Anybody added reverb to their D'Clone...?

10/19/2000 7:23 PM
Steve A.	Re: Anybody added reverb to their D'Clone...? Jay: The standard Fender topology was lopping off the high end. I had been tearing my hair out trying to get a decent OD sound from the Vibrato channel of my Pro Reverb project amp— the preamps that sounded great in a 5F6A design came out sounding like a tinny transistor radio version of same: So after inhaling a double shot of solder fumes, this idea came to me: "Why not wire the OD channel up like the Normal channel, bypassing all of the reverb BS and running the signal to the PI directly?" Eureka! The tinniness was gone and the OD channel sounded more like it did in my hotrodded 5F6A... From that moment on I decided to skip reverb for the overdrive channels in my homebrew amps... Now I've heard Marshall and Mega Boogie amps that add reverb to their OD channels and and it seems to work pretty good. But the thought in the back of my mind is this: maybe the amp would sound even better if they weren't running the OD Channel through the reverb splitter circuitry... I like the way that they added reverb in the Matchless Chieftain, by mixing in the reverb signal at the normally grounded PI input... but I'm not sure if that is feasible if you are using NFB and a presence control in your output section. I guess that you could add in the 2 stage tweed mixer ahead of the PI to blend the dry and wet signals. Question on the tweed mixer: could you tap the reverb feed right from the dry input to the tweed mixer? That way the OD signal would be reverberated... The tweed mixer would add another stage of gain ahead of the PI... (Can somebody compute the expected gain from the 5E8-A mixer circuit, both with a 12AY7 and a 12AX7???) One thought that just occurred to me would be to replace the 3rd stage in the Express preamp with the tweed mixer and run that into the PI... --Thanks! Steve Ahola

10/19/2000 7:23 PM

Steve A.

Re: Anybody added reverb to their D'Clone...?

Jay:

The standard Fender topology was lopping off the high end.

I had been tearing my hair out trying to get a decent OD sound from the Vibrato channel of my Pro Reverb project amp— the preamps that sounded great in a 5F6A design came out sounding like a tinny transistor radio version of same:

    So after inhaling a double shot of solder fumes, this idea came to me: "Why not wire the OD channel up like the Normal channel, bypassing all of the reverb BS and running the signal to the PI directly?" Eureka! The tinniness was gone and the OD channel sounded more like it did in my hotrodded 5F6A...

    From that moment on I decided to skip reverb for the overdrive channels in my homebrew amps...

    Now I've heard Marshall and Mega Boogie amps that add reverb to their OD channels and and it seems to work pretty good. But the thought in the back of my mind is this: maybe the amp would sound even better if they weren't running the OD Channel through the reverb splitter circuitry...

    I like the way that they added reverb in the Matchless Chieftain, by mixing in the reverb signal at the normally grounded PI input... but I'm not sure if that is feasible if you are using NFB and a presence control in your output section. I guess that you could add in the 2 stage tweed mixer ahead of the PI to blend the dry and wet signals. Question on the tweed mixer: could you tap the reverb feed right from the dry input to the tweed mixer? That way the OD signal would be reverberated...

    The tweed mixer would add another stage of gain ahead of the PI... (Can somebody compute the expected gain from the 5E8-A mixer circuit, both with a 12AY7 and a 12AX7???) One thought that just occurred to me would be to replace the 3rd stage in the Express preamp with the tweed mixer and run that into the PI...

--Thanks!

Steve Ahola

Replies:

Ray Ivers Steve,I don't think... -- 10/19/2000 9:09 PM
JaySG "Question on the tweed mixer: could... -- 10/19/2000 9:36 PM