a cheap and reliable methode is the magnetic regulator,
I use choke regulated heater transformers.
There is no need for fast regulation.
73
Peter
________________________________
From: ham_amplifiers@... [mailto:ham_amplifiers@...]
On Behalf Of hinrgdj1
### Fil V can be of concern...esp when sucking vast amounts of
current for the plate xfmr. On a set up where the fil xfmr pri
V
is derived from the same 240 V source as the plate pri.... under
a
full bore load... the fil V can be affected.
Especially with indirectly heated cathodes. They are much more
likely to
be damaged by changing filament voltages, especially low voltages.
### One way out of this mess, is to run a separate, smaller 240
V
line... just for the fil xfmr pri. That might not solve all
the
fil sag problems... but at least the separate fil 240 v supply...
will only have the v drop on your drop wires coming into your
home, to contend with. If anybody goes this route... make sure
you label.. "more than one live circuit present". You are
gonna
have to kill TWO sets of breakers to completely kill all 240
v
coming into the amp. In cases where the RF deck is totally
separate from the HV supply, it may not be an issue.
And if you have line voltage variations that are common, especially
in
areas where high air conditioning loads are the norm, even separate
circuits wont help.
### I have the fil xfmr, and associated variac for it.. + a
sola constant V xfmr.. in a shelf... below RF deck.... so RF
deck
is in top of rack... fil stuff is below... in same rack. HV
supply
is in a separate rack.
+++ C&H Sales has a sweet SOLA CVS, rack/floor mount that will handle
a single YC-156/179 or +++GS-35B's, metered in/outs...plus other
120vac control/rotors/etc. up to 500VA output...(best to load heavy
for best regulation). Their Stock #STR9900
