[ARC5] Help Needed

[Clare Owens]

Hi Joel,

Last March at an estate auction I was able to buy a Very nice BC-348R that
had been fixed up and converted to AC by a real craftsman, the retired
chief engineer from station WBT.  It came with what is apparently the
dynamotor from which the filter box for the AC supply was taken, a
DM-28-J.  It has some rust on the outside of the frame but the labels and
the interior are nice.  The guy even left the four mounting screws in the
mounting bracket.  I cleaned and regreased the bearings in March and it
sounded and ran OK then but not perfectly.  When I saw your email yesterday
I went over to the shelf, got the dyno and tried it out.  It sounded too
noisy so I cleaned the bearings again this morning and regreased it.  Now
it sounds like a normal WW II dynamotor (well, except for the SCR-522
dynos, whose sound is like music to my ears - but that's another story) and
produces 225V with 24.5V @ .75A input, no load.

To make this long story short, send me your address and I'll pack up the
dynamotor and send it to you, no charge.  I'll never use it and you will so
it belongs with you.  Early Black Friday gift.

Clare  N2RJB




On Sun, Nov 23, 2014 at 3:50 AM, Joel R Roberts <joelroberts001 at comcast.net>
wrote:

> Greetings everyone, and happy Holidays. I was recently given a BC-348-R
> that looks to be internally intact, but is of course missing the Dynamotor
> and Filter assembly, and also the metal case. Does anyone know where I can
> find the values for the two filter chokes in the assembly? As every one of
> the complete Dynamotor/Filter assembly's are scarce, and those we
> occasionally see on the bay are quickly driven out of my price range,
> similar to the Modulator/Dynamotor sets that a lot of us need, I am going
> to build up a substitute using the manuals and schematics that I currently
> have. If anyone has an extra case or knows the value of the chokes, let me
> know. I really appreciate the help. Thanks and 73's to all,,,,,,,Joel
> KB0FPT
>
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