[Milsurplus] BC-611 to external antenna

[WA5CAB at cs.com]

Gene,

As Al said, the decimal point on your slide rule needs shifting.  :-)  
However, the roughly 35 mA is total BA-38 drain.  In transmit mode, when you're 
dipping the final, the plate current to the 3S4 should dip to roughly 8.0 - 8.5 
mA.  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.

I don't have any other original docs (that I can find) that list rf power 
output,  My recollection was output of around 500 mW but that would require > 50% 
efficiency so I think you'd be safe using the 255 figure.

In a message dated 2/16/2007 2:02:24 PM Central Standard Time, 
ersmar at comcast.net writes: 
>      BTW - Does anyone out there in cyberland know what the sensitivity 
> spec is for the BC-611?  Also, TM11-4019 - repair instructions for the BC-611 
> series - says that the TX output is 255 mW modulated (p 36, table XI) but the 
> B+ batt drain is listed as 35 mA at 103.5 V for appr 36 mW nominal TX power 
> comsumption.  Which is right, if either?  I'm preparing a slide presentation 
> for the local radio club on squad radios and I'd like to compare 
> pounds-per-Watt output for these milrads with modern HTs.  Thanks.

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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