On Nov 7, 7:54*am, "Gareth Magennis"
wrote:
Hi,

I have a WEM Dominator Bass Mk1 with a blown mains transformer (shorted
primary).http://www.vintagehofner.co.uk/brita...cs/dommk3.html

As a possible alternative to a rewind, which I haven't investigated yet
.....

if I got 2 x 240v : 6v transformers (I am in the UK) and connected both
secondaries together to get 240v back out for the HT, could I use the 6v as
a heater supply, or is it best to use a separate transformer for this (or a
better way to get the 6.3v)

I realise that the rectified 240v may be a little high for this amp, but
maybe loading the 6v tap with heaters might be just the thing to bring it
down somewhat, or I could use another method.

(I also note the 6.3v winding is centre tapped and grounded on this circuit)

Cheers,

Gareth.

By bodge, do you mean what us west of the pond folks call kluge?

Anyway, the voltage rating of the capacitors on rectified output will
determine if the rectified 240V is excessive or not. The tubes can
take it. Also, you will have double losses going from your 240 input
to 6V and back to 240V, so you will probably only have 230V on the
output or maybe less. Tapping the 6 V for filaments is reasonable, I
would connect a couple of resistors in series across the 6V and
connect the midpont to ground to approximate their grounding scheme,
it probably is to reduce hum from the input amplifier tubes. Make the
resistors 10K or so to not overload the first 240 - 6V transformer.
After things are running, check both transformers that you are not
overheating anythingg.