want 2 Rok JM signature tone board layout

[hitchcaster]

People talk about hearing cable I can agree with that, the only person I've every heard talk about how "fast" or "slow" an amp was was Danny Gatton. I remember some interview he gave where he talked about having his amps modded so they had less wire in them and the response time from striking a note ad the amp was more accurate.
_________________

Danny Gatton
Coming from a guy that hard wired his Reverb switch to the 120 AC outlet to intentionally blow fuses on a slow night... I have seen a couple of the insides of Danny's personally modded amps and can tell you the leads were not shortened...Some of it was was like wow really!!

The secret to getting that DG tone is rub your new strings in Beer and cigarette ashes..

Tony....Huge Gatton Fan..

he really wired up a switch to short the AC outlets on his own gig? that's genius!!! he's mentioned the cigarette ashes... sometimes I worry about water getting on my guitar then I think of his beer trick on a vintage tele and forget about it

[turbo5speed]

Seems to me that the way the switches are wired in these two schematics is upside down in a tubes down chassis?

Also, on the deep switch how is the signal going through the 270k resistors?

Mark

Do you know the model/type/brand of the reverb tank in the schematic?

[M Fowler]

No I don't know which tank the authors were suggesting.

I used the Twin Reverb reverb driver and chassis is 19.5" so the tank will be limited to 17" or shorter and chose based on the driver's spec's. Tank positioned on bottom of head cab. I tested with an old Super Reverb tank.

Mark

[turbo5speed]

No I don't know which tank the authors were suggesting.

I used the Twin Reverb reverb driver and chassis is 19.5" so the tank will be limited to 17" or shorter and chose based on the driver's spec's. Tank positioned on bottom of head cab. I tested with an old Super Reverb tank.

Mark

So you ignored the reverb section of this schematic and went for a typical fender reverb driver correct?

Thanks for the info.

[M Fowler]

No I don't know which tank the authors were suggesting.

I used the Twin Reverb reverb driver and chassis is 19.5" so the tank will be limited to 17" or shorter and chose based on the driver's spec's. Tank positioned on bottom of head cab. I tested with an old Super Reverb tank.

Mark

So you ignored the reverb section of this schematic and went for a typical fender reverb driver correct?

Thanks for the info.

No I used the schematic's circuit but it doesn't spec reverb driver or pan but since I'm using 100w Twin Reverb transformers I used the driver as well. I'll choose my pan based on that driver's spec. I could look all that up and then tell you which pan I'm going to use if that helps.

Mark

[mauiboy81]

Is the Level/Master Volume control really wired as shown on the schematic with the in from the mixer to the wiper?

[M Fowler]

Is the Level/Master Volume control really wired as shown on the schematic with the in from the mixer to the wiper?

Yes that is NOT correct. edited

[Aaron]

The wiper should go to PI cap. When these were drawn I had created templates not realizing that I drawn it wrong. So there were a few with the incorrect wiring and switching.
Just haven't had enough time to go back and fix them all. Been busy building studio gear

[M Fowler]

Looks like wiper goes to send jack and entrance of MV pot goes to junction of 68k & 108k. (4a/4b)

Power amp in goes to .02uf of PI.

[Aaron]

Well, finally got round to finishing the schematic.

A few values have been changed from suggestions made by the people who have built/seen one.

I have not built or tested so assume it has errors.

Thanks,
Aaron

[mauiboy81]

I thought that MV was probably a mistake. Looks good and I may have to try this out as well some time.

Side note... That's a lot of LNFB all over the place. When I built a clean only 50watt version of one twenty four I put the LNFB on a switch and I liked it better with it switched out. With it in the circuit it felt a little lifeless. I like the tone JM gets from his sig so maybe with the extra stage for mixing it will bring some life back.

[M Fowler]

I added a switch on the backside for the LNFB as well.

Thanks for the updated schematic Aaron.

I see one resistor change originally schematic had a 108k in the mixer now changed to 205k if this is correct I will change that to higher value.

[Aaron]

Instead of using a resistor a few people mentioned subbing in a pot to get the right amount of blend between the dry and reverb and then measuring the resistance and hardwiring a resistor back in.

Thanks,
Aaron

[Aaron]

EDIT:- double post

[M Fowler]

Here are some photos of my mess, I will clean it up when I get the magic.