[Milsurplus] New MF Amateur Band Approved at WRC - 472 to 479

[Ben Dover]

While I have the appropriate ART-13 stuff here, I'm thinking a better
choice is that rig I've had stashed in a closet for a couple of years...
a BC-375, with the BC-306 external tank coil (ie, "Loading Coil").

Pull the modulator tubes (the FCC sure as hell ain't gonna allow AM on 
the band, unfortunately) and they become a pair of spares for the MO and
the PA.

I'm thinking run the rig on a conservative, reduced plate voltage, like 
600 to 800 VDC, to baby those 211 triodes.

Got another possible candidate here too; there's a TBW transmitter long 
wave section out in my garage, but it needs a couple of tubes.


Mr. T.  W9LBB 


-----Original Message-----
>From: Mike Morrow <kk5f at earthlink.net>
>Sent: Feb 19, 2012 9:20 PM
>To: milsurplus at mailman.qth.net
>Subject: Re: [Milsurplus] New MF Amateur Band Approved at WRC - 472 to 479
>
>
>>The Bendix Ta-12B transmitter covers the new LF band, although, I don't 
>>know how plentiful they are.
>
>They show up. An un-hacked TA-12C (which also covers the 300 to 600 kHz range)
>went for only $51 on eBay two days ago.  But...the MT-53B external MF PA tank
>coil is a mandatory component for that range and it can be rather difficult to
>come across.  Also, the MP-28BA dynamotor/modulator for the TA-12* is not an
>easy thing to get either, not that one would be modulating anything on that
>band except perhaps PSK31.
>
>The T-47/ART-13 with O-16/ART-13 and CU-25/ART-13 PA tank coil, or (even better)
>the T-47A/ART-13 with O-17/ART-13A and CU-32/ART-13A PA tank coil would be a
>great choice.
>
>The ATD transmitter CRR-52253 with (non-standard) LF/MF tuning unit CRR-47207
>and LF/MF antenna tuning unit CRR-47206 would likely do nicely as well.
>
>Neither of these would need any 800 cps power, like the common GO and GP sets.
>
>Mike / KK5F
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