[Milsurplus] GO-9, AT-12 - fil choke
Marty Reynolds
cosmoline at aa4rm.ba-watch.org
Fri Jun 5 15:29:26 EDT 2009
> OK, but several other things need to be mentioned that haven't yet.
> First,
> you need to connect the replacement chokes to the four points where the
> original was connected.
Gess I failed to say toroid wound with 2 CONDUCTER small speaker wire. A
4-terminal
device
No disrespect, but have never had any single conductor speaker here.
>.....The 837 VFO filament is shunted by two 40 ohm 1
> watt
> resistors in series. These up the nominal filament current to the VFO to
> 826
> mA. The cathode is tied to the junction of these resistors and to some
> capacitors. The center-tap of the filament supply winding on T-202 goes
> to
> ground through a 1000 ohm 20 watt resistor, which is the cathode resistor
> for
> the VFO. If you use a 12.6 volt outboard filament transformer, you need
> to
> include the latter resistor. I don't know just what effect simply
> grounding
> the center-tap of the 12 volt winding would have but it isn't likely to be
> beneficial. And finally, you would need to bypass the 4.5 ohm IPA
> filament
> resistor.
>
Whew
Might you agree above all under term 'impementation?' Think I'd just turn
it on
as is & send out some Vs to dummy load
Marty
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