[Boatanchors] Big Bird Project - Dovetron report

[David Ross]

Greenkeyers -

  George delivered my Dovetron yesterday at Seapac.  It is not new but
is in very nice condition with some scuffs, a couple minor scratches,
and some paint missing under the rackmount screws.  Came wrapped in a
thick polyethylene bag and with an attached green tag from Sacramento
ALC stating "Cond Unk", Condition Code "F", and dated MAR 5 1998.

  Have not yet fed it any signals, but the front panel test does just
fine.  (Set MODE to "MS REV", set AFSK/OFF to AFSK, and you will be able
to tune in your transmitted tones using the cross display.)

  A paper label on the top cover says:
A:  Mark 1232, Space 1317:  1275 Hz +/- 42.5 Hz
B:  Mark 1575, Space 2425:  2000 Hz +/- 425  Hz
C:  Mark  500, Space  700:   600 Hz +/- 100  Hz
  I note with satisfaction that B came already set up for clatternet.  A
is set up for Channel 6 of a 16 channel TTYMUX arrangement, and C is set
up for a common landline frequency pair.

  Betcha this Dovetron came out of a TSC-60(V)7 -  Sacramento ALC
(McClellan AFB) was 'prime' for the TSC-60(V)7, rebuilt them onsite and
supported them all over the world.  All TSC-60(V)7 units had a Tempest
Dovetron, plus all had equipment compatible with the three freqs/modes
listed above.

  One other note here...  Does anyone have any experience with using
Dovetrons on 85CPS shift?  Will a standard Dovetron pick out a single
85SHIFT tone pair out of a full working 16 channel MUX signal?  Or is
there a problem with adjacent channel interference from the next higher
& lower tone pairs?

  Have fun with yours.  And Many Thanks to George Hutchison & Glen
Galati for doing this mass purchase and making the "Big Bird" Dovetron
Distribution possible.



73
Dave Ross    N7EPI    ross@hypertools.com