[Hammarlund] Collins or Hammarlund?

Wed, 10 Mar 2004 14:15:30 -0600

I agree with Glen about the usefulness of  SSB and CW.

I never use my vintage stuff for SSB or CW.  It's all SWBC or MWBC use.
That's what most of them were designed for.

It's unfair to compare the stability of the SP-600 to the likes of the
R-390A series...utilizing oven controlled xtal oscillators and PTO's.  They
were never meant to be.  And try SSB on any one of these old rigs that came
equipped with a BFO and it's frustrating to the average user.  It's doable
but not usually enjoyable....

When I want to do SSB or CW I will go to the ICOM R-75 (or R-1051)...that's
what I bought it for....that and when I want the bells and whistles of
direct frequency entry, memories etc....

When I want top quality audio to fill the shop from some far away place it's
the vintage gear that is fired up....

Love that glow too...

Cecil...
----- Original Message ----- 
From: "Glen Zook" <[email protected]>
To: <[email protected]>
Cc: "Craig Roberts" <[email protected]>
Sent: Wednesday, March 10, 2004 12:42 PM
Subject: Re: [Hammarlund] Collins or Hammarlund?

> The SP-600 is, as are most Hammarlund receivers,
> stable enough for most AM operation.  But, when you
> try to use them on SSB or CW, that is where the
> drifting problems come in.  When crystal controlled
> (like with the JX-17, etc., models), when using the
> crystal they are very stable.  It is just when tuning
> "normally" that the drift occurs.  The drift is much
> worse on the higher bands.  The lower the band range,
> the more stable the receiver is.
>
> There are individual exceptions, and some particular
> receivers are more stable than others (due to
> component tolerances most often).  But, it has been my
> experience that a large number of the Hammarlund
> receivers do tend to drift.  Of course, the same can
> be said for quite a number of other manufacturers'
> receivers including many models made by Hallicrafters,
> National, etc.
>
> Frankly, I have a number of "shortwave" band receivers
> from the 1930s that you can let warm up for about 30
> minutes and then tune in a broadcast station (on
> "shortwave") and the receiver is stable enough to hold
> the frequency.  However, I wouldn't even try to use
> them on CW or SSB if they did have a BFO.
>
> Glen, K9STH
>
>
> --- "Ray, W2EC" <[email protected]> wrote:
>
> I can power up the SP-600, dial in a known BC
> frequency on the vernier setting, and listen all day
> without touching the dial again.
>
>
>
> =====
> Glen, K9STH
>
> Web sites
>
> http://home.comcast.net/~k9sth
> http://home.comcast.net/~zcomco
>
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