Monkeymatic 18TMB

[xtian]

Very nice distortion. Smooth. Tone controls very responsive.

NFB switch implemented as shown. Aside from volume, difference is subtle, and I haven't characterized it yet.

[xtian]

Baby has a new house. Gonna need a matching, tube-powered duck call.

[Blindog]

Nice work!! Did you do the Tolex yourself?

Mark

[xtian]

Nice work!! Did you do the Tolex yourself?

Mark

Thanks, Mark, yes. I've settled on this water based stuff:

https://www.tubesandmore.com/search/node/tolex%20glue

Easy to use, easy on the nose and eyes, easy clean up, dries to a nice tack in 20 minutes, decent repositionability, sticks good.

[ChrisM]

Looks good, I like your amps. You have a unique building style.

What's happening with the front panel?

[lord preset]

Is the AES glue substantially different than this stuff?

[img:400:400]http://www.homedepot.com/catalog/produc ... 1e_400.jpg[/img]

I tried the Weldwood water based cement and concluded that its production and marketing was an elaborate practical joke. After multiple attempts it became clear that surfaces coated in this glue not only didn't stick together but may have actually been repelled. Possible application in levitation perhaps?

I suppose I should try another water based glue, but I would miss the neat hallucinations you get with the red can.

[eniam rognab]

Outstanding buddy! lovin that camo

much progress has been made since i saw it, you fast!!

beautiful,
neal

[CHIP]

Is the AES glue substantially different than this stuff?

[img:400:400]http://www.homedepot.com/catalog/produc ... 1e_400.jpg[/img]

I tried the Weldwood water based cement and concluded that its production and marketing was an elaborate practical joke. After multiple attempts it became clear that surfaces coated in this glue not only didn't stick together but may have actually been repelled. Possible application in levitation perhaps?

I suppose I should try another water based glue, but I would miss the neat hallucinations you get with the red can.

The water based glue from AES works great.

I had the same experience with the DAP junk, I returned it to Home Depot and got my money refunded.

[xtian]

Yeah, I have not used Weldwood.

Hey, Neal!

I'm going to make a valence covered in the black Marshall cloth that Taylor sent me. thanks, Taylor!

[statorvane]

I've used both DAP/Weldwood products - green can and red can. The green stuff won't soften the Tolex/vinyl, but doesn't seem to have as much tack strength as the red can. Can take a long time to dry - affected by relative humidity I think. I have waited as long as 45 minutes for it to get tacky. It appears the shear strength of this adhesive exhibits some amount of creep as compared to the red stuff. Nowhere as stinky as the red can variety.

The red stuff can soften the Tolex/vinyl, so go easy with it on the covering. Sticks very well, but stinks pretty bad. Drying time does not seem to be affected by relative humidity. Does not exhibit the tendency for the Tolex/vinyl to creep like the other variety.

I found if either variety loses tack strength you can re-activate it with a swab of lacquer thinner.

I prefer the red can stuff.

[dorrisant]

Nice build as usual, xtian! I've been looking at that tolex on sale at AES/CED... Funny, I was thinking Marshall/Naylor would be appropriate.

Tony

[xtian]

I've been looking at that tolex on sale at AES/CED... Funny, I was thinking Marshall/Naylor would be appropriate.

Right? I bought it because it was dirt cheap, and I threw it in the cart with another order.

Marshall, yes. Ted Nugent would approve. Even though I don't approve of Ted.

[xtian]

I'm simplifying the controls. The simple tone control is gone, but TMB is staying. So now I have two equivalent first triodes (the grids are tied together, and I have only two input jacks, high and low).

I thought I'd be clever and use a dual-ganged 500k pot for the volume, instead of two separate pots. But then I got even more clever, or less stupid, and thought, well, this really is just a parallel triode gain stage.

Are the two circuits shown equivalent?

[statorvane]

Think that'd be closer to a 47uF cathode cap. Other than that, yeah I think pretty identical.

[sunnydaze]

You could use differering cathode resistor and bypass values on the first option and get some different sounds. Another approach - could add a switch between parallel, cascaded and even vintage to keep all options. Would be a little different. Merlin's book has that one.

Cool looking amp.

Best regards,
Mike