[ARC5] BC-442-A relay connections

[AKLDGUY .]

You are right. Googling resulted in hits for the manuals, which I ignored,
assuming they were
the same as my own SCR-274-N manuals, which didn't show the wiring layout.

So this has drawn attention to a deficiency in my manuals. One shows a
different page
numbering altogether (like 5-19) and appears to be a shortened version. The
other stops at
p161, and is then followed by a description of the BC-946-B.

Looks like I need to discard both versions and retain the one you linked to.

Thank you.
Neil ZL1ANM


On Wed, Nov 8, 2017 at 11:20 AM, Mike Morrow <kk5f at earthlink.net> wrote:

> 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
>
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