[Hallicrafters] Best Rx?

[Glen Zook]

I had never heard of an SX-111 without the crystal calibrator.  The advertisement in the 1961 ARRL Handbook (which was published in the 4th quarter of 1960) lists the SX-111 as having the crystal calibrator.

Brand's book, Ham Equipment Buyer's Guide, lists the SX-111 as being introduced in 1959 and with the crystal calibrator.  The Hallicrafters advertisement on page 109 of the December 1959 issue of QST, which introduces the SX-111, definitely states that the receiver has a crystal calibrator.  I believe that an SX-111 without the crystal calibrator is going to be pretty rare.

Glen, K9STH

Website:  http://k9sth.com


--- On Sat, 11/27/10, Robert Nickels <ranickel at comcast.net> wrote:

Raymond Moore's book lists three variations:
 
SX-111 Early version 1960-61.  12 tubes SX-111 Later version  Remarks:  "Adds crystal calibrator to original SX-111
SX-111 MK 1  1961-62.    14 tubes.   Remarks:  "Adds product detector to SX-111
 
So you could have an SX-111 with 12, 13, or 14 tubes. The chassis would either be unmarked (original) or Mark 1.
 
Since the 101A was in production until 1962 and the SX-115 from '61 thru '64,  it seems reasonable to infer that it was not initially intended as an SSB receiver, and the product detector was added only after the 101A was discontinued.   This gave them a mate for the HT-37 that still could be sold for half the price of the 115.