New ReleaSSSes

[David Root]

Lefty, what I have on #004 also contains errors and ambiguities, I believe. I have tried to read between the lines and my comments were based on my own interpretations, so I'm not going to unwittingly mislead anyone but myself at this point by publishing anything.

If what I'm building works when it's finished and doesn't eat tubes or have other defects, then I will draw it up.

10thtx, thank you, that makes it easier to read all right. The filters are also unclear to me, and I don't think the reverb topology is right either, at least it looks odd to say the least to have the reverb feed signal coming from V3B and returning to V3A.

And try as I might I cannot see the direct coupled CF mixer. Looks cap coupled to me.

[glasman]

Lefty, what I have on #004 also contains errors and ambiguities, I believe. I have tried to read between the lines and my comments were based on my own interpretations, so I'm not going to unwittingly mislead anyone but myself at this point by publishing anything.

If what I'm building works when it's finished and doesn't eat tubes or have other defects, then I will draw it up.

10thtx, thank you, that makes it easier to read all right. The filters are also unclear to me, and I don't think the reverb topology is right either, at least it looks odd to say the least to have the reverb feed signal coming from V3B and returning to V3A.

And try as I might I cannot see the direct coupled CF mixer. Looks cap coupled to me.

Its there (top right corner) with the 220K resistors. But what makes it not not so clear is how the CF's are drawn.

BTW, anyone spot the glaring error in the CF circuit.?

[bcook]

Thanks 10thTx,
One correction I see is the pins marked 3 and 8 on the driver tube should be the anodes, 1 and 6 the cathodes

[LeftyStrat]

The inductor is marked tf5sx2077, but I think that should be tf5sx20zz, which is a triad inductor with the following specs:

0.3HY-4MA-50-OH

[wjdunham]

Lefty, what I have on #004 also contains errors and ambiguities, I believe. I have tried to read between the lines and my comments were based on my own interpretations, so I'm not going to unwittingly mislead anyone but myself at this point by publishing anything.

If what I'm building works when it's finished and doesn't eat tubes or have other defects, then I will draw it up.

10thtx, thank you, that makes it easier to read all right. The filters are also unclear to me, and I don't think the reverb topology is right either, at least it looks odd to say the least to have the reverb feed signal coming from V3B and returning to V3A.

And try as I might I cannot see the direct coupled CF mixer. Looks cap coupled to me.

Its there (top right corner) with the 220K resistors. But what makes it not not so clear is how the CF's are drawn.

BTW, anyone spot the glaring error in the CF circuit.?

Lest anyone burn their house down trying to build it as drawn, the 1K cathode resistors should be 100K...
Bill

[LeftyStrat]

I just can't make any sense out of that reverb circuit. V5 is driving the transformer. What exactly is V4a for? It's input is labeled '4' but I don't see that anywhere on the diagram. V4b seems to be the return for the reverb, what is the jack attached to the cathode of v4a for?

[glasman]

I just can't make any sense out of that reverb circuit. V5 is driving the transformer. What exactly is V4a for? It's input is labeled '4' but I don't see that anywhere on the diagram. V4b seems to be the return for the reverb, what is the jack attached to the cathode of v4a for?

When I looked at it several months ago. I figured the feed was from the output of filter.


Gary

[David Root]

I think that jack is attached to the secondary of the reverb transformer. Note the "Black" and "Green" notations nearby.

"4" is connected to the "4" in a triangle off the volume pot wiper in the lower left of the page.

Gary is right, this is pretty "inscrutable" isn't it.

[LeftyStrat]

This might be crazy or wrong. If you are familiar with Craig Anderton's 'Hot Springs', he parallels two tanks, out of phase on the input, and in phase on the output, in order to cancel out the original signal and only leave the reflections.

It looks like this circuit may be running feedback around the reverb circuitry, perhaps to do the same thing?

Normally the grids of the reverb driver are tied together. But in this schematic one side is driven by the cathode follower in the recovery stage(!?) and the other side is driven from the plate of v4a, which takes it's signal prior to the filter section.

This is definitely the wildest guitar amp design I think I have ever seen.

[boldaslove6789]

Quite distorted and its really hard to tell but for those who missed it (he must have took it off):

SSS #2 Gut shot

Anybody have some CIA image sharpening software you see on all the new Crime shows ?

[IMG:314:196]http://i444.photobucket.com/albums/qq16 ... _Small.png[/img]

[LeftyStrat]

10thtx, there's an error where '1' (yel) is attached to the grid of the reverb driver. This actually goes to the plate of the driver. The grids are tied together with a single 10k grid stopper.

[LeftyStrat]

Anybody have some CIA image sharpening software you see on all the new Crime shows ?

Enhance, enhance, enhance....

Actually, the photos that sonicmojo provided a link for show a lot of detail of the Ceriatone guts. I've been slowly verifying the filter circuit.

[markusw]

I believe that this is how the filters might work.
At least the frequency response looks reasonable. The 10n cap on position 5 of the high filter just looks weird.

[markusw]

BTW, anyone spot the glaring error in the CF circuit.?

Isn't the 1k cathode resistor a bit too low? Should probably be 100k.

[grtamp]

Markus , great work on the filter circuit!, seems to me may work right!