Mark Oppat wrote:
Are these Mackay 3010B receivers in the same calibur as a R-390's? Also,
what do these receivers generally go for?
Does anyone have one to sell?
email me direct at
QST reviewed the Mackay 3010B in April 1967 (they loved it
for its strong signal handling performance near the W1AW
kilowatts.)
The rf amplifier frame grid tube that Doug mentioned
as a weak point is the Amperex type 7788. It has an extremely high
Gm, and is sought after by the Audiophile croud,
so is an expensive tube to replace. Many 3010 receivers
have their front panel gouged near the broadcast band reject filter,
since that filter had to be unscrewed from the front panel
for access to the 7788 tube.
One advantage of the 3010 receiver, is that it uses the same
3.1 KHz plug-in mechanical filter as the Collins 75A4,
and a socket was provided for an optional 500 Hz c.w. filter.
The 6 KHz bandwidth is produced by a built-in crystal filter.
The tuning rate is too fast for good SSB, and you wind up using
the variable BFO knob as a poor man's fine tuning.
SSB was after-thought with this receiver. The BFO pitch control isn't
even calibrated "USB/LSB".
73,
Ed Knobloch