[Hallicrafters] Hallicrafters SX-88

[Jim Liles]

I would like to repeat an information request regarding the 50Kc I.F. system used in the SX-88.  

-----Original Message----- 
From: Jim Liles 
Sent: Thursday, July 16, 2015 7:21 PM 
To: hallicrafters at mailman.qth.net ; Roy Morgan 
Subject: [Hallicrafters] Hallicrafters SX-88 


I have some questions regarding the SX-88.  

First have you done a sweep analysis of the 50Kc I.F. system or do you know of someone who has?  At this point it appears that nobody has taken the time to sweep that system ---- anybody? 

Can anyone confirm that the 50Kc I.F. charts in the book are correct?

Looking at the design I would expect the shape factor for the system to be close to 2.2/1 which is very close to the crystal filters of that time.  Is that a correct analysis?

Has anyone measured the Q of the first, second , and fourth 50Kc transformer pairs as well as the third pair?

More questions but sure would like to hear from those who have had one on the bench.  That radio is probably the most enigmatic of the Hallicrafters bunch.  Always wanted to put one through sea trials.

Would like to hear both objective as well as subjective opinions and test results.  Sounds to be some strong feelings regarding that radio’s performance.  Please for the moment put the past aside and help me with this project.     

Kindest regards Jim K9AXN  
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