[MRCA] Vibrators

[Transmaster]

There are a couple of places that have solid state replacements in 2,
3, 4, 6, 7, and 9 pin bases in voltages from 5 to 24 VDC.  But they
are mostly for vacuum tube car radios. They are not in the VB series.
At least now I know what to look for.  I will dig out the ER article
about building one.  I have external power supplies that have every
voltage know to radio land but It doesn't seem right to power such a
small transmitter with a power supply that sports a pair of 866's and
weights 95 pounds,  As soon as I land a manuals for these radios, a
AVT-112A, AVR-20A1, and the RVT-15 A.  I will know what to do. The
AVT-112A is complete and in good visual condition, can any of you tell
me what frequency range the 112A has,  It uses the large V Cut Crystal
Unit RCA AVA10D  I have a number of these the one I have in hand is
cut for 3.805 Mhz, which if this little transmitter will operate in is
perfect.

On 12/14/06, WA5CAB at cs.com <WA5CAB at cs.com> wrote:
> Wasn't that AVT-15A and AVR-20A?  If so, it is wired for 6 volts.  As with
> Dennis, the only octal based vibrators I've ever come across are VB-11, 12
> and 13 used in the PE-120-(*).  I didn't bother to check the base wiring of
> the VB-12 (the 6-volt one) as even if it would work, they've become almost
> unobtanium because when the US and French armies abandoned 6-volt vehicles,
> the PE-120's got put into 24 volt ones and the 6-volt vibrators were
> discarded.
>
>  The vibrator used in the AVT-15A was of the shunt (rather than series)
> type.  I would rather recommend that you make a solid state replacement.
> Finding an octal plug is a lot easier that finding a 4, 6 or 7-pin one as
> used on most vibrators.  There was a circuit shown in ER some years back for
> one to replace the vibrator in a DY-88 or DY-105.  I have a .TIF copy of the
> article but it doesn't show what issue it was in.  Maybe Richard will see
> this and post it.  The name of the article was "GRC-9 Operating Notes", by
> Richard Brunner.
>
>
>
>  In a message dated 12/14/2006
>
> >I have a circa 1941 RCA RVT-15A  Aircraft transmitter.  It is missing
>  >the vibrator, the one it uses has a octal base...........
>
>  Robert Downs - Houston
>  <http://www.wa5cab.com> (Web Store)
>  MVPA 9480
>  <wa5cab at cs.com> (Primary email)
>  <wa5cab at houston.rr.com> (Backup email)
>


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