[Milsurplus] 800-1 800 cycle rotary inverter

[W7QHO at aol.com]

In a message dated 11/25/05 8:20:19 AM, rbrunner at gis.net writes:


> Does anyone have experience with the 800-1 inverter?  Using one with my
> TBW transmitter seems not quite satisfactory.  When adjusted for best
> line regulation (a few volts) key-up/down, the filament voltage varies
> too much.  When adjusted for minimum filament voltage variation (1 volt
> or less) key-up/down, the line voltage does strange things, but there is
> only a trace of chirp on 40M.
> The TBW instruction book says you wil normally have about 4 microfarad
> of line capacitor shown connected, which is what I have as optimum.
> 
> 

Richard,

Interesting....   I don't recall that my TBW book says anything at all about 
line voltage variation, only filament voltage.   The TBW didn't originally run 
off of an aircraft type inverter but likely that it's cousin the GO-9 did.   
Using primary keying as the TBW and GO-9 do would present the input power 
source with an abruptly switched on/off 200W+ load that probably includes a 
nontrivial reactive component.   Wouldn't be surprised to see the power source 
"reacting" under these conditions.   Would be interested in more detail on the 
(strange) line voltage variations referred to in your e-mail.

Dennis D. W7QHO
Glendale, CA