[Milsurplus] BC-611 to external antenna

[WA5CAB at cs.com]

No.  The efficiency was calculated knowing the actual input power when 
feeding the actual antenna, and taking the stated output power from the manual as 
gospel.  I've never considered it worth the time to try to figure out how to 
measure the actual output power.

In a message dated 2/17/2007 1:35:32 AM Central Standard Time, 
kargo_cult at msn.com writes: 
> >  In transmit mode.....Which is 800 - 850m mW for an efficiency of around 
> 28%.  That's low for a 
> >Class C amp but really not too bad considering the frightfully short 
> antenna 
> >and that the emission mode is A3 rather than A1.
> >Robert Downs - Houston
> 
> Is this efficiency measured into a dummy load replicating characteristic of 
> the very short  whip
> antenna? If so- i assume it's because of the difficulty of loading a very 
> low resistance load
> with a small loading coil, and due to the extremes of match values needed. 
> Actually, when you
> consider the efficiency of the antenna also, probably in the very low single 
> digit % points, the
> actual radiated RF is probably a handful of milliwatts only.  Try that for 
> the club show-and-tell.
> I don't know if this is the least watts/ weight ratio, however. There are 
> some other contenders.
> There's that VHF transmitter, TDQ or whatever. Third Reich had a backpack 
> rig along the 
> electrical lines of our TBY ( Torn. FuD2 ), which was a 2-man load, and i 
> mean 2 serious
> loads, to operate while in motion. -Hue Miller
> 

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