[ARC5] R-26 BFO injection adjustment

WA5CAB at cs.com WA5CAB at cs.com
Fri May 12 11:35:47 EDT 2017


I didn't mean that I thought that you needed to disable the AGC to listen 
to an SSB station.  I was merely mentioning that it would be easy (other than 
the double-handfull of screws that have to be removed) to do a comparison.

Unlike all of the military sets of the 1940's, many of the ham AM sets seem 
to have taken up to a minute to switch between transmit and receive.  The 
habit apparently hasn't totally died out.  

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 05/12/2017 08:42:05 AM Central Daylight Time, 
ac2eu at yahoo.com writes: 
> Removing c45 gave me enough BFO that it can work pretty well with medium 
> -strong signals. No reason that I can see to disable the AGC. In fact I 
> wish it worked better than it does.
> 
> 
> Made contact with a SSB station 400 miles away last night amidst QRN, QRM 
> and poor propagation with my paltry 25 watts of AM.
>  While these sets were designed before SSB existed, SSB can be demodulated 
> by an ARC-5 receiver with patience and a "light touch".
> 
> 
> Even though it takes some patience to get an SSB station tuned in, it 
> takes a lot more patience to wait for an "AM station" to stop talking!
>  I wanted to throw my call out to one last night, but I gave up after he 
> talked continuously for for 15 minutes without a break. I don't think he 
> cared if anybody was still listening! It seem that AM ops are "long play" 
> talkers in general...jeesh!
> 
> 
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