[ARC5] BC-442-A relay connections

[Michael Hanz]

I would caution to think twice about discarding a version of any manual 
you may have electronically or otherwise.  There are gems in each that 
have been deleted for unknown reasons in later versions. For example, 
the ARC test sets in the Contract No. 1470-NY-1941 manual were removed 
from the later versions.

Just a suggestion...

  - Mike  KC4TOS

On 11/7/2017 5:58 PM, AKLDGUY . wrote:
> 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 
> <mailto: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/
>     <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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-- 
Michael Hanz - KC4TOS

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