[MRCA] In Search of a BC-456 Modulator

[Mark K3MSB]

Hi Mark

There was either a BC-456 or MD-7 at Fair Radio Sales last summer when I
was there;  I’m sorry but I don’t remember any more details but it may be
worth a call to them.

I’m thinking of doing a rebuild of my SCR-274N system to make it easier to
take for historical displays.   Mine is on a long 2 tier wooden shelf and I
can no longer carry it.

I’m wondering what you have in mind for making cables.    Mine are white
cloth covered cables as Dave AB5X (I believe) told me years ago that’s what
was used towards the end of the war.    What are you considering doing?

I’ve given up hope of finding a shock mount for the 3 TX rack,  and am
looking into the possibility of having one made.   Two options,  have one
fabricated and use the shocks from other units,  or use existing shock
mounts (such as for a single TX) but splicing in a length of channel to
widen them for the 3 TX rack.

My goal (somewhat nebulous) is to be able to have my SCR-274N on display in
use with a BC-611.

Sorry for the ramble…….

73 Mark K3MSB





On Tue, Dec 17, 2019, 7:48 AM WW2RDO via MRCA <mrca at mailman.qth.net> wrote:

> Hello Everybody,
>           I am slowly putting together a SCR-274-N Command set ( 3-2 set
> up ) and have run into a bit of a roadblock.  Does anybody know of a BC-456
> Modulator in decent shape that is available for purchase?  The set up I'm
> looking to do will be used not only for historical display for a museum,
> but also will be a working station that is fully intended to be used on the
> air.  I have the 2 transmitters and 3 receivers and the mounting racks, and
> am also working on the shock mounts.  I also have the BC-450 and BC-451
> control boxes, and some of the plugs to have the electrical cabling made.
> I've tried to stay away from American Radio Corporation (ARC) components as
> some components of the ARC-5 system are not compatible with the SCR-274-N.
> Any help would be appreciated.
>
> Mark D.
> WW2RDO
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