SB-310/300/301's on other bands....

Sheldon Darack shel at LUCENT.COM
Tue Dec 15 13:54:40 EST 1998


How about it SB303 owners, shouldn't we convert our 15 MHz WWV rcv
positions to 10 MHz?  Is there enough range in those coils to do that?
Shel  WA2UBK

At 07:57 AM 12/15/98 -0800, you wrote:
>Here's the info, straight from the Radio Free Europe engineers, for
>putting said radios on other non-standard bands...
>
>xtal freq= freq of desired band startpoint minus 8.895 (in Mhz)
>Example...desired range is 19.005--19.505mhz...xtal is 27.900.
>(27.9-8.895=19.005)
>
>Tune up...
>1)Insert correct xtal in socket--use a band nearest to the desired freq.
>2)Connect a VTVM, set on minus DC volts (5 or 15v scale) to test point A
>on the RF circuit board--towards the front of the board.
>3)Peak the appropriate Hetrodyne oscillator coil (should be about -5dc)
>4)Tune the RF amp coil to max noise or signal (if one is tuned in)
>5)Tune the ANT coil similarly...
>
>That's it.  I haven't checked to see if the three coils in question are
>different between the 310' and the 300/301'---they possibly are, but
>this may not make a lot of difference...
>
>I have tried these instructions for one out of band coil in my 310' and
>it seemed to work well.  I have not tried this for my 301', but since
>the radios are awfully close, it should work.  These instructions, once
>again, were from a typed memo that was placed in the "alignment" section
>of my 310' manual, from Radio Free Europe engineers...
>        Supposedly, RFE had a bunch of 310's--I wonder where they are
>now?
>
>ggg

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