[Hammarlund] Collins or Hammarlund?

Wed, 10 Mar 2004 17:45:27 -0500

Craig,
        FWIW, both my Hammarlund SP 600 JX-17 and HQ 180 AX are very
stable from turn on till whenever!   For listening enjoyment I prefer
(1)the SP 600, then (2) the 180AX (both have better audio for my blown
out ears) and finally the R-390A's for when I want to listen to something
weak that I've found with the SP-600.   
        The 180s are great in that they have 'vernier tuning' and
variable notch filter as well as selectable usb/lsb.    A lot of fun and
enjoyable to work with!      I wouldn't want to be without any one of
them!!!    By the way, the 180A version has a second filament transformer
that is "always powered up" to keep the filaments of the osc and mixer
tubes warm to minimize drift.   I keep mine unplugged untill needed.    
I wouldn't want to be without any one of them!!!    
          Then there is the R-392, the National HRO and the Halli SX-71
etc, etc.    We could go on forever, but whatever you do, you won't go
wrong with an SP-600, IMHO!

Bruce 
        

On Wed, 10 Mar 2004 14:36:27 -0500 "Craig Roberts" <[email protected]>
writes:
> Glen says: "...it has been my experience that a large number of the
> Hammarlund receivers do tend to drift."
> 
> T'is so with models other than the SP-600, too. My Collins 75S-3 is 
> rock
> stable almost from the moment of turn-on with flawless dial tracking 
> and
> accuracy.  My Hammarlund HQ-170A -- despite its perpetually heated 
> HF
> oscillator and first mixer tubes -- never seems to settle down 
> completely
> and has a frequency readout that can only be called "approximate." I 
> think
> that's the real reason it's equipped with its Vernier Tuning 
> control. I
> still love that radio, though.
> 
> By the way, if anyone has any hints about increasing the stability 
> and
> readout accuracy of the HQ-series receivers, please submit them. You 
> can
> even flame me for doubting the solidity of these sets, as long as 
> you tell
> us how to fix them.
> 
> 73,
> 
> Craig
> W3CRR
> 
> 
> _______________________________________________
> List Administrator: Duane Fischer W8DBF
> ** For Assistance: [email protected] **
> ----
> http://mailman.qth.net/mailman/listinfo/hammarlund
> 
>