[Milsurplus] Re: SCR-274-N Transmitter Dial Etc.

[WA5CAB at cs.com]

No, my main point was that if you are not going to radiate anyway, you 
certainly wouldn't wait until the aircraft had been raised to the flight deck to 
tune the receivers and the transmitter oscillators and preset the loading coils.  
If you've never been on a flight deck during flight ops, you have no idea how 
dangerous that would be.  Besides, SOP at the time was to load the deck, spot 
and launch.  There would be no time for the later planes raised to have their 
radios tuned.

If it was considered OK to radiate on the hanger deck, tuning a transmitter 
there would be better than depending upon the cal charts.  

In a message dated 7/6/2008 10:10:30 PM Central Daylight Time, 
kargo_cult at msn.com writes: 
> >Why not?
> >
> >In a message dated 7/6/2008 4:06:50 PM Central Daylight Time, 
> >kargo_cult at msn.com writes: 
> >>And i have wondered how on flattops, the transmitters were set up before
> >>a flight.  Let's say, a patrol plane going out. You cannot tune up the 
> >>transmitter
> >>below the flight deck.
> 
> Somewhere here i have instructions for tuning up a civilian HF aircraft
> radio. The instructions direct not to tune up in hangar. I assume, don't
> recall if the instructions specifically explained this, that capacity effect
> of hangar to wire antenna threw off the antenna resonance, compared
> to the open air situation.  If the antenna is naturally resonant, this 
> effect
> isn't so strong, but if you have an electrically short antenna resonated
> with external inductance, i suppose so. Possibly this applies even more
> so below on a service deck, besides the caution to not operate any 
> transmitter that might cause sparking from the antenna HV. 
> 

Robert & Susan Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at comcast.net> (Backup email)
   
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