Train Wreck Pie

[Andy Le Blanc]

I've put a wreck circuit in to an eight inch cake tin.
It was an older project to miniaturize a tube pre. and power supply.
An all tube distortion / boost pedal.
I instantly had noise troubles due to the high gain an
preamp proximity to the power supply
have to rethink layout in such a confined space.
DC fil. volts greatly helped to lower the noise...
it makes for a fun drive pedal with a mast. vol.
great tone when things are just right.
the extra wreck stage is further back in the circuit
than say a marshall and definatly has its own thing.
fifty watts non master would be killer....tax time cometh....

[Lonely Raven]

That's cool in a sort of scary way.

Got photos??

[El_Martin]

Hi!

Just take a look at my Lil' Wreck. It's a TW inspired preamp AND a Triode SE POWER! amp. Chassis is an old aluminum heat sink profile the size of a 3.5" floppy drive. Actually the bottom plate IS of a floppy drive

In spite of the criss-cross leading wires hum and hiss are not too much of a problem. I tried to keep the rectifiers and first cap as close to the HV transformer and as far (approx. 4 inch) away from the preamp as possible.

Ciao
Martin

[Andy Le Blanc]

the original notion was to make a completely selfcontained
unit.....it really started as a 8'' cake tin from walmart...
the power supply is two 12 V transformers from radio shack
hooked secondary to secondary to get the fil. volts
followed by a voltage doubler....
the noise was great (low) until the extra gain stage was tried
it really places demands on layout...
I can put one of the trannies out side the unit....like a walwort
I can use smaller switches....but the tube amp parts on a cake tin are too much fun
so I'm off to walmart......
I used terminal strips and point to point....
going to a board to clean up the voltage doubler and add a couple of filter stages will help as space allows....
and rectifier selection towrds less swicthing noise

[El_Martin]

Hi Andy!

I used UF4007 with good results.
While designing my amp. one possible idea for a chassis had been a de-gutted switching power supply from a pc.
sturdy, slots for cooling already present

Ciao
Martin

[Andy Le Blanc]

the whole thing was bench scrap
I dont have a clue as to what I used
scabbed them from somewhere..... and now paid for it
the cake tin is 8'' round and a little under 2'' deep
the thing that made it work was mounting the tubes
on a structural cross piece... kept the whole thing from flexing
I wanted a stomp box...... with a real tube amp in it
goals for the next one :

cleaner power supply... on a board space is a premium
and it needs a voltage doubler

layout layout layout..... everthing is in side the box
trannies and tubes .....one thing I noticed is that the point to point
hook up is on the wrong side of the cross piece that holds it all
it could be used like a shield

and if theres space DC fil. volts