[ARC5] BC-442-A relay connections

[WA5CAB at cs.com]

Or T.O. 16-10-50 or T.O. 16-40SCR274-5.  The correction to T.O. 08-10-50 
was made 05 FEB 45.  Whomever made the mods to his unit for 12 V was on the 
right track (moving the jumper) but didn't complete the job.  Regardless of 
whether the coils are electrically in parallel or series, they must be 
magnetically in series.

In a message dated 11/07/2017 16:20:55 PM Central Standard Time, 
kk5f at earthlink.net writes: 
> Refer to SCR-274-N Handbook of Maintenance Instructions TO 12R2-3SCR274-2 
> of June 1956 which is found here:
> 
> http://bama.edebris.com/manuals/military/scr274/
> 
> On page 187, the detailed physical internal wiring layout for BC-442-A in 
> Figure 50 shows **exactly** the information you seek.
> 
> Mike / KK5F
> 
> -----Original Message-----
> From: "AKLDGUY ."
> Sent: Nov 7, 2017 3:40 PM
> 
> There appears to be no diagram on the internet that shows the wiring to 
> the twin winding K55 relay coil in the BC-442-A antenna relay unit. With the 
> unit upright and with K55 at top left, let's number the coil connections 
> 1,2,3,4 from the top.
> My unit has 12V scrawled on the outside. The socket is connected to 1 and 
> 2, with 2 strapped to 3. Terminal 4 is unconnected.
> To rewire to 28V, I should retain the 2-3 strap and connect to 1 and 4, 
> correct?
> Neil ZL1ANM
> _

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20171108/cbd7875e/attachment.html>