3 Sep
2008
3 Sep
'08
3:58 p.m.
Chuck Guzis wrote:
On 3 Sep 2008 at 12:45, Brent Hilpert wrote:
William Donzelli wrote:
Ya, it would be more authentic but the filament
supply would then weigh 20 lbs
instead of 2.
Sure, but a nice beefy transformer will give you many decades of
service without problems. High-ampere 5V transformers shouldn't be
uncommon, as many 5v rectifier filaments (such as the 5U4) were
pretty hungry (the 5U4 is rated at 3 amps). Or use a smaller transformer. Don't make me break
out the Radio Masters.
Oh, yes, for example, we do have some variety of such at the radio museum.
Transmitters with parallelled 5V fil. rectifiers can be a source of larger ones.
Joking aside, and I don't want to speak for William, but I think at this point
his project is in the experimental stage .. whatever is at hand will do.
On the other hand, for the ABC ASM reconstruction I was working on I was
targetting using only period-appropriate components. I'm still debating whether
to cheat and use a silicon diode for the C- bias rectifier (it could perhaps
have been a selenium) or go to the bother of throwing in another rectifier
tube, which will also require the hassle of an additional isolated filament supply.