Pictures!

[Zapp Brannigan]

This is still kind of a work in progress. It works, but it looks like I'm going to need shielded wire in a few places I wasn't thinking about But anyway, this is my Matchles Hotbox clone. I have a bit of a Matchless fetish, so I've always wanted one, but $400 for a used one vs. $100 or so for parts is kind of a no-brainer I'm going to unbox it so I can re-do some of the wiring and so I can finish the box, but this is what it look like now (without the bottom, obviously):

If it's not a secret, what kind of problems do you have that you need shielded wires? Is it kinda whistle or lf hum? AFAIR, Hotbox is not skullg-grinding hi-gainer. First impression says it may be the transformer which is too close to tonestack and grid wires, which are quite sensitive. If it is low freq hum, there is a good trick to get rid of it: a 1/2 watt trimmer with 1 and 3 lugs soldered to heater leads of transformer, and 2 lug connected to ground. If you turn the trimmer in some position the hum will disappear. Some kind of artificial midpoint (I don't know how exactly translate this term into English).

[vigilante397]

It's a high pitched squeal. I've had that problem on a couple amp builds and either shielding or moving high gain lines has worked wonders. I'm sure the power transformer placement is a factor as well, but of course I drilled everything before the transformer showed up and it was bigger than I was led to believe so that's the only place it will fit, and it barely fits there

What you mentioned is often referred to as an artificial center tap and can also be achieved with a pair of resistors from the heaters to ground (which I did in this buuld). Merlin (valvewizard) refers to a balancing pot pike that as a "humdinger."

[Zapp Brannigan]

If it squeals, mayebe 100-220 pf cap between plate and cathode of 1st cascade would help?

[thermionix]

Lead dress first.  "Cheats" if all else fails.

[vigilante397]

The lead dress is a terrible mess this was very much a case of building the plane in the air, I was just too darn excited to wait and do everything right so I'll re-do a lot (probably most) of the wiring, and if that doesn't take care of it I'll try a cap like you suggested.

[Telvis]

RUBY MINI AMP 2X2

[EBK]

I built a second Clone Theory in a 1590B.  I'm posting pics of this one only because I think it turned out much better than my first build.


Here's the boards, the "dry fit", and the necessary lid modification:



The rest is really just wires and gaffers tape, which I can show if you really want to see it.... 

[bluebunny]

Very nice build, Eric.  Wall-to-wall vero: Dino would be proud. 

(Did you post a layout, btw?  Let's see how my search-fu goes...)

[PMowdes]

Frostwave funk-a-duck envelope filter, another one from Dino's archive.  Just a few loose ends to tidy up


Sent from my F5321 using Tapatalk

[lars-musik]

That's very neat build and enclosure!

I haven't posted anything here for a long time. Now I proudly present my doubly cloned Clone of a Timmy! The TMMY/JRY.

[EBK]

That's very neat build and enclosure!

Very nice build, Eric.  Wall-to-wall vero: Dino would be proud. 

(Did you post a layout, btw?  Let's see how my search-fu goes...)

Thanks, guys!

Layout is based largely on this:
http://tagboardeffects.blogspot.com/2014/05/electro-harmonix-clone-theory.html?m=1
I moved the electrolytic caps slightly so they can lay down.  Large film caps are moved for the same reason but still go to the same holes.  I also corrected two cap values per Scruffie's research, added corner cutaways, and made the charge pump board slightly wider so it is lower.

[Luke51411]

Memento delay from lectric-fx with added modulation, completed with alcohol inks and a sticker I bought in a Zapatista tienda in Mexico. My favorite of my alcohol ink finishes yet! I got quite a bit of the red on my hands that I couldn't get off. A few coworkers asked if I had just gutted a deer 

[Telvis]

ONE TRANSISTOR

[drteming]

Smallest turret board.  Just a dummy resistive load for my 15W so I can use headphones late at night.  Output to an O2 amp.

[drteming]

Here's the top side.  It's an old Pentium 4 heatsink.  Thermal paste in the middle, 4 drops of super glue at the corners.  Overkill?  Why, yes!

[Benoi31]

That's very neat build and enclosure!

I haven't posted anything here for a long time. Now I proudly present my doubly cloned Clone of a Timmy! The TMMY/JRY.

Wow man!
Amazing!
Can we have a gutshot of this beauty?

[EBK]

What size enclosure is that?

I agree.  I want to see the guts. 

[Plexi]

I bet it's a 125B 
Which painting method you use?

[lars-musik]

Thanks for your interest.
Yes, it is a 125B and it is reverse etched (should post it over there, too).

I  was a bit reluctant with posting the guts here, because I have already done a Version 2 with pots and switches onboard but I sold my only copy of the new one without taking pictures of the inside. So here you'll get the guts of the one posted above (two boards inside, both layed out for 1590a) and an image of my Version 2.

[drteming]

Finally finished the double valvecaster.  No much of a finish, just clear coat over raw aluminum and ink jet transparent stickers.  Definite function over form (or just laziness ).