[Hammarlund] Favorite Hammerlund Receiver

[Todd, KA1KAQ]

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