[Hallicrafters] What is this?

[Carl]

----- Original Message ----- 
From: "Todd, KA1KAQ" <ka1kaq at gmail.com>
To: "Carl" <km1h at jeremy.mv.com>
Cc: <hallicrafters at mailman.qth.net>
Sent: Thursday, July 08, 2010 9:53 AM
Subject: Re: [Hallicrafters] What is this?


> On Thu, Jul 8, 2010 at 9:03 AM, Carl <km1h at jeremy.mv.com> wrote:
>> The SX-9 is not a bad receiver for 1936 Todd. I use a second prodution 
>> run
>> version in the minimalist station mostly on CW along with a few others. 
>> It
>> is superior in stability and general use than any other Halli single RF 
>> and
>> xtal filter set that I have here up thru a SX-110. Transmitters are 
>> various
>> early 30's designs.
>
> Well, in its defense, it was nearly 30 yrs ago and the limited talents
> I have now were even more limited then, so chances are good I wasn't
> getting best performance out of the SX-9. I did like the knob-on-dial
> tuning system, was very basic but effective. Pretty well-built overall
> too. Just didn't interest me much. What's the significance between the
> Halli emblem in the upper right corner? Mine didn't have that. First
> run? Second?

The emblem is the first run


>
>> The HQ-120X is far superior and thet gets cycled in with the 129X,140X, 
>> and
>> RBG along with the Viking I.
>
> That's the other part of the story: I came across my first HQ-120X
> around the same time, and it was no contest. The Hammars of the day
> were about as good as it got, even the 'low end' 120 as you pointed
> out recently. One of the few sets I regretted selling, though there's
> a 129X in the queue waiting for some work.
>
>> I wouldnt own a RME-69!
>
> It's another nice rig, used within its limits. You really need the
> DB-20 preselector paired up with it to get near the HRO or SP-10/100.
> There's a nice one waiting for me just south of you, need to pick it
> up next time I'm up there. Far better shape than the one I had in '81.

The ads of the time kept promoting the DB-20 as almost mandatory for the 69. 
The early ones helped the images but the tubes used (6D6) were such noise 
generators that they actually reduced the MDS on 10M. The later ones with 
6K7's were a little better. These can easily be modified to a 6SG7. See 
below for other changes as they hold for the DB-20 also.

I prefer the DB-22A with a 6BZ6 in place of the 1st stage and the second 
6BA6 bypassed with a cap but with its coils intact. Move the gain control to 
the 6BZ6. This gives the best performance and I use the pair here often.

Carl
KM1H


>
> ~ Todd/KAQ