[Hallicrafters] Best RX?

[Carl]

Its referred to as MDS and that is a very subjective measurement and can 
vary 20dB or so among users. I use a properly matched generator to radio, 
quad shielded coax and a GR output meter. A signal that is 3dB above the 
noise is my benchmark; I can hear way below that from decades of working DX 
in the noise from 160 to microwave. Its been my experience that many home 
shops do not have the proper test setup which includes excessive signal 
leakage from the generator and coax.

Carl
KM1H


----- Original Message ----- 
From: "Glen Zook" <gzook at yahoo.com>
To: "hallicrafters" <Hallicrafters at mailman.qth.net>; "Walt Cates" 
<cateswa at msn.com>
Sent: Saturday, November 27, 2010 10:45 PM
Subject: Re: [Hallicrafters] Best RX?


I have found that the LDS, least discernible signal, is really more 
meaningful than doing a S+N/N measurement.  Other than that, I basically 
agree with the test parameters.

I use service monitors with accurately calibrated attenuators when servicing 
receivers, have Tektronix oscilloscopes, etc.

Glen, K9STH

Website:  http://k9sth.com


--- On Sat, 11/27/10, Walt Cates <cateswa at msn.com> wrote:

The comments I have read so far on this matter have all been pretty 
subjective. The real measure of the "quality of a receiver" is the 
sensitivity, selectivity, gain, and S+N:N ratio. The only way to test this 
performance is with calibrated test equipment. So to settle this issue those 
who own the various rigs in question should take them to a second party with 
calibrated equipment and get the rigs tested. Then post the results. We can 
build a database of the results and settle the question. Any one living in 
the Kansas City area can bring their rig to my shop and I will test and post 
the results, NO CHARGE. I would encourage all who have the proper equipment 
to do the same in their area. The tests are simple and can be performed 
without getting inside the rigs.




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