[Hammarlund] Favorite Hammerlund Receiver

[Carl]

----- Original Message ----- 
From: "Todd, KA1KAQ" <ka1kaq at gmail.com>
To: <kgordon2006 at frontier.com>
Cc: "Hammarlund Radios" <hammarlund at mailman.qth.net>
Sent: Monday, December 12, 2011 6:38 PM
Subject: Re: [Hammarlund] Favorite Hammerlund Receiver


> On Mon, Dec 12, 2011 at 3:21 PM, Kenneth G. Gordon
> <kgordon2006 at frontier.com> wrote:
>> On 12 Dec 2011 at 13:40, Todd, KA1KAQ wrote:
>>
>>> There's a lot to be said for single conversion.
>>
>> Less noise, for one (a BIG one).
>
> That was the one I had in mind too. Those other stages are nice, but...
>
>> BOY! What a completely amazing difference!!!!! :-)
>
>> I was completely amazed at the quietness, apparent sensitivity, and
>> generally sweet, sweet recovered audio, and the detector seemed to
>> work as well, or better, for AM as it did for CW/RTTY/SSB.
>
> Interesting. I'm not a big fan of trying to make old radios perform
> like newer ones, but I do like simple improvements like drop in tube
> swaps. Hard to imagine the AM audio sounding better, though!
>
>> That double-preselection on ALL bands was a real winner as far as I
>> was concerned.
>>
>> I don't remember ever turning that receiver off after that for a
>> number of years.
>
> You were using the set correctly, then. With all of the complaints
> about Super Pro drift, I always wonder how many folks ever read the
> original manuals where it says the set was designed to be left on to
> allow it to become temperature stable or such. Strangely, my SP-100
> seems to stabilize pretty quickly when I turn it on. Turn it off after
> hours of listening to AM 740 out of Ontario, turn it back on days or
> weeks later and it's dead-nuts-on. Guess I'm just lucky, though the
> radio has seen some work in its past. I should dig into it and see
> just how much, if anything was done to address drift.
>
> ~ Todd,  KA1KAQ/4

What did you expect? Even a Hallicrafters or RME is stable on the BCB.
I usually use a Zenith 12S265 to listen to 740 when Im upstairs and a 51J4 
in the basement at the workbench.

Carl