[Hammarlund] questions about the HQ-170

[Glen Zook]

The HQ-170A was an "improved" version of the HQ-170.  One major difference was that the "A" version used solid-state rectifiers and the original version had a 5U4 for the rectifier.

The "A" version had a separate filament transformer that was always "on" when the unit was plugged into the wall outlet.  This transformer kept the heaters ("filaments") continuously lit for the tunable oscillator and first mixer circuits.  The original receiver did not have this feature
 
Glen, K9STH


Website:  http://k9sth.com


________________________________
 From: "yash at aol.com" <yash at aol.com>
To: hammarlund at mailman.qth.net 
Sent: Tuesday, July 2, 2013 3:22 PM
Subject: [Hammarlund] questions about the HQ-170
 

     Been looking at some pictures of the HQ-170. Have some questions to ask.
1. there is only one model of the HQ-170? what is a HQ-170A?
2. Where is the SN# on the radio,mine has no rear sticker, stamped some where?
3. I saw several pictures that were listed as a 170 and the cabinet had a lift up door on the top, like a Collins. were there different cabinets during production? my cabinet is solid one piece, perforated metal. 
any info would be appreciated. 73