[ARC5] BC-442-A relay connections

[AKLDGUY .]

It won't hurt to keep the others, I guess.

(as I sit here re-assembling the relay after rewiring the tags. It's such
fun
trying to fit a circlip the diameter of a match head back onto the central
pin
while trying not to break my newly fitted wires)
Neil ZL1ANM


On Wed, Nov 8, 2017 at 12:37 PM, Michael Hanz <aaf-radio-1 at aafradio.org>
wrote:

> 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> 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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> --
> Michael Hanz - KC4TOS
>
>
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