[Hammarlund] Early super pros

[Roy Morgan]

At 02:34 PM 2/28/2007, Bob Young wrote:
>I have a BC-779-B which has 5 bands: 100-200, 200-400, 2.5-5.0, 5.0- 10.0, 
>and 10.0-20.0. I think that is standard for these.

Bob and others,

Yes, it seems that the above frequency bands were standard for the BC-779A 
and BC-779B.  I have parts of a manual for those radios and that is what it 
says.

I am left with a couple of questions:

1) Did the early Super Pro (SP-1xx, -2xx, and 4xx) appear in a low 
frequency only version?  If so was it a TRF design?

2) Does anyone know of conversion articles that tell about modifying one or 
more bands for changed frequencies?  I ran into one BC-779 in which this 
had apparently been done.

I just had a peek at the SP-600 VLF manual and found that:
- It is a super het design, (not a TRF as I thought.)
- it covers from 10 kc to 540 kc in 6 bands
- crystal controlled local oscillator is provided, as in the normal SP-600-JX
- the normal IF is 705 KC
- There's a mixer to produce 455 kc IF output using a crystal oscillator at 
1160 kc.


Roy



- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing
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