[Collins] 51J4 vs 75A3?

[Dr. Gerald N. Johnson]

On Mon, 2007-02-12 at 18:15 -0600, Joe Eide wrote:
> Well Eugene, I can give you a few differences and opinions that probably 
> don't mean much, but will give you something to think about anyway:
> 
> 51J-4:
> 
> General coverage, harder to move to different bands, harder to repair 
> (especially to remove PTO),  need external power to mute receiver,  no 
> pretty winged emblem, meter reads dB instead of S-units, slightly 
> heavier, higher value.
> 
> 75A-3:
> 
> Ham bands only (WARC?), faster band changing, easier to reach components 
> during repair,  PTO not as problematic, simple contact closure for 
> muting, pretty winged emblem, conventional S meter, at least 1 tube less 
> and slightly lighter in weight, lower value.

No WARC on any 75A receiver. They were 25 years before the new WARC
bands.
> 
> 75A-4:
> 
> Dream receiver, Collins designed ssb (vs after thought), light weight 
> (20 lbs less), much more valuable, did I mention dream receiver???    :  )
> (I know you didn't ask, but if you've never tried an A4, you may be 
> missing something.  People seem to covet the late serial numbers, but 
> ANY 75A-4 is a wonderful radio to own if working properly)

That bandpass tuning was sure smooth even if all mechanical.
> 
> Just my opinions,
> 
> Joe - KB9R
> 
> 

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer