[ARC5] Link frequency meter

[Christopher Bowne]

Thanks Robert.  Yep - that appears to be the same unit, perhaps the chart 
provided in the "de-mil" version was changed from the original one, or there 
were several versions to work different frequency ranges.  I suspect that the 
one I have was dumped as a de-mil version after the war with a commercial name 
tag. The fifth harmonic of 39.1 Mc  (195.5 Mc) noted on my cal chart is at the 
low end of the frequency range quoted for the BC-438. Will have to put its 
variable output into my HP counter to see where its actually making its RF.  
Interesting that it is a piece of test gear for one of the very early radar 
systems.  The length of the little whip antenna appears to be close to a quarter 
wave at 195-215 Mc. 





________________________________
From: "WA5CAB at cs.com" <WA5CAB at cs.com>
To: arc5 at mailman.qth.net
Sent: Wed, January 9, 2013 3:12:58 PM
Subject: Re: [ARC5] Link frequency meter

BC-438 was built for SCR-268 and covers 194-216 MC.  I had one once but 
sold it to a radar collector.

In a message dated 01/09/2013 13:19:59 PM Central Standard Time, 
elden_meyer at yahoo.com writes: 
> These are similar in principle to the BC-221 et al.
>  
> At least one version was made for the military, with a different frequency 
> range,
> as the BC-438. There is a very brief description and schematic in the CQ
> Surplus Schematics Handbook (on the Web various places). The diagram
> should be similar for all models.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html