"Dave Plowman (News)" wrote in message
...
In article ,
Keith G wrote:
Hi, I have been offline from this group for a while, but would
appreciate some advice on restoring a stock Dynaco ST70 for use in the
UK. Thanks, David



David is one of my 'offroaders' and offlist I have pointed him to a
stepdown trannie for his 117 Volt Dynaco ST70, mentioned above:

http://www.eurobatteries.com/sitepag...tors-ac-ac.asp


Does anyone here know of any drawbacks or why one of these might not be
suitable for audio use? (I have never used one myself - my Dynacos being
240V....)

My thinking is that it would allow him to retain his original (I hope)
Dynaco power supply trannie...???

(Note the clever 'Brit plug/Yank socket' arrangement on the 16 quid
model - very handy for anyone with similar Yank kit with original power
cables/plugs on it...!!)

An auto transformer will be fine - but make sure it is adequately rated
for the mains power *consumption* of the amp - not its nominal power
output. The power consumption on a UK device is normally on a plate
somewhere - can't speak for others.

For audio use this range which uses toroidal transformers with minimal
external magnetic field might be attractive.

http://www.tlc-direct.co.uk/Main_Ind...ter/index.html



They are actually the wrong way round - step down is what's needed. (US amp
on UK mains.)

The step down range looks good:

http://www.tlc-direct.co.uk/Main_Ind...mer/index.html

But I've no idea what loading would be required - if the price approached
that of a replacement 240V power tranny it would arguably be not worth the
bother..??