Fitting huge Trafomatic iron...

[Quad]

So I got all the parts to build my ST70 - tubes, VTA board (thanks
to Mike Sherman), misc hardware, an old Dynaco ST70
chassis and yes, a set of Trafomatic potted toroidal
transformers (OPTs and PT).

The thing is - the transformers are probably waay overdesigned.
On the ST70 chassis, at the rear where the transformers fit, I can
barely get the two OPTs to fit with no space for the PT.

So what do I do - mount the PT in a separate chassis,
make a 'daughter chassis' for the PT and OPTs and bolt it
to the back of the ST70, or just forget the Dynaco chassis
and put everything on a clean, larger chassis?
I'd really like to use the ST70 chassis to lend an authentic air.

Mounting the toroids vertically is not a good
option - they are potted and the encased bolt may not hold
the weight, even if I give aesthetics the go by.

All ideas accepted! Anyone else used this iron?

- Prasad

[kheper]

So what do I do - mount the PT in a separate chassis,
make a 'daughter chassis' for the PT and OPTs and bolt it
to the back of the ST70, or just forget the Dynaco chassis
and put everything on a clean, larger chassis?
I'd really like to use the ST70 chassis to lend an authentic air.
- Prasad

I think the 'just forget the Dynaco chassis and put everything on a clean, larger chassis' option is best.

When you use toroids in an st-70, the 'authentic air' evacuates from the room.

[EWBrown]

The Trafomatic set will just barely fit on a 17X 10 X 3 chassis, they're just too wide across to fit on the 13 inch wide ST70 chassis. Hhve one "in (slow) progress ...

/ed B

[Slartibartfast]

You could mount them like so:


http://s130.photobucket.com/albums/p280/jeffdavison/ST-70/?action=view&current=7.jpg

[TomMcNally]

The Velleman mounts them inside on the back panel, pretty substantial material ...

[EWBrown]

The Big ST-70 Trafos are over 5 inches in diameter. these are the potted shielded ones that I was referring to. THe unpotted ones are a bit smaller diameter and height.

/ed

[burnedfingers]

You could mount them like so:


http://s130.photobucket.com/albums/p280 ... rent=7.jpg


Nice looking amp Yellow_Light_Colorz_PDT_06

How do you like the Mapletree driver board?

[Slartibartfast]

You could mount them like so:


http://s130.photobucket.com/albums/p280 ... rent=7.jpg


Nice looking amp Yellow_Light_Colorz_PDT_06

How do you like the Mapletree driver board?

That is not my amp. Yellow_Light_Colorz_PDT_13 I found that while looking at some older threads...