Care to have a look at this schem?
Moderators: pompeiisneaks, Colossal
Re: Care to have a look at this schem?
Don't forget about Criagslist. Supers are big enough that people don't want to ship them. Sometimes, you'll find people looking to get rid of them without the hassle. I found a 1965 (non-reissue) in really nice shape for $650 last year. It takes some luck, but the deals are out there.
-
tubelectron
- Posts: 128
- Joined: Sun Dec 04, 2011 10:33 am
- Location: France
Re: Care to have a look at this schem?
Hi pinkphiloyd,
I had a look to your schem, and I have the same comments as in the previous posts and some suggestions, based on my experience :
R26 should be 1200 to 1500R.
Removing the tremolo circuit will increase the overall gain slightly, so you may need an attenuator, which could interestingly be a master volume pot just before the phase splitter, like on SF versions.
C13 should be 47nF instead of 22nf, except if it is what you expressly want.
C14 would be interesting to be increased to 4n7 - 10nF for a deeper tone, but it is a matter of taste.
R49 and C18 should be replaced with a single 820R / 1W for a cleaner, deeper reverb tone.
Inserting 1K to 1K5 / 1W + 10 - 22µF / 450V to GND to filter the B+ going to the reverb driver plate gets rid of a sometimes annoying light hum due to a lack of filtering, at high reverb settings.
If you dislike metallic sounding reverb, you can wire a 470pf / 1kV from plate to cathode (or GND) of the reverb driver, and a 1n5 to 2n2 accross R32.
If your amp tends to parasitic oscillation or fuzzy overdrive at high volume setting, and wiring arrangement modifications tried first does nothing, then you may need to wire 2 680pf to 1nF accross R5 and R42, or increase R4 nad R6 to 4K7 - 10K.
Finally, you can wire a (big) DPDT switch to switch the 6L6 from pentode to triode, dividing the power by roughly 2.5-3 and smoothing overdriven tones.
OK, these are partially "SF-orientated" suggestions... and may not be the ones you'd expect ! Trust me : these are not so bad...
[img:271:640]http://img10.hostingpics.net/pics/77134 ... _stack.jpg[/img]
A+!
I had a look to your schem, and I have the same comments as in the previous posts and some suggestions, based on my experience :
R26 should be 1200 to 1500R.
Removing the tremolo circuit will increase the overall gain slightly, so you may need an attenuator, which could interestingly be a master volume pot just before the phase splitter, like on SF versions.
C13 should be 47nF instead of 22nf, except if it is what you expressly want.
C14 would be interesting to be increased to 4n7 - 10nF for a deeper tone, but it is a matter of taste.
R49 and C18 should be replaced with a single 820R / 1W for a cleaner, deeper reverb tone.
Inserting 1K to 1K5 / 1W + 10 - 22µF / 450V to GND to filter the B+ going to the reverb driver plate gets rid of a sometimes annoying light hum due to a lack of filtering, at high reverb settings.
If you dislike metallic sounding reverb, you can wire a 470pf / 1kV from plate to cathode (or GND) of the reverb driver, and a 1n5 to 2n2 accross R32.
If your amp tends to parasitic oscillation or fuzzy overdrive at high volume setting, and wiring arrangement modifications tried first does nothing, then you may need to wire 2 680pf to 1nF accross R5 and R42, or increase R4 nad R6 to 4K7 - 10K.
Finally, you can wire a (big) DPDT switch to switch the 6L6 from pentode to triode, dividing the power by roughly 2.5-3 and smoothing overdriven tones.
OK, these are partially "SF-orientated" suggestions... and may not be the ones you'd expect ! Trust me : these are not so bad...
[img:271:640]http://img10.hostingpics.net/pics/77134 ... _stack.jpg[/img]
A+!
Re: Care to have a look at this schem?
Let's see ...tubelectron wrote:[img:271:640]http://img10.hostingpics.net/pics/77134 ... _stack.jpg[/img]
Late '70s Champ
Late '70s Princeton Reverb
Early '70s Deluxe Reverb
Early '70s MV Twin Reverb
