[Hammarlund] aligning my HQ-180

[Bob Camp]

Hi

Most of the sweep alignments I’ve done have been on crystal filters with network analyzers. 

By far the most impressive job I’ve ever seen (in 50 years doing this) was on the production line at Motorola. They had a setup for doing 455 KC IF’s with a sweeper. The gal could do an entire IF from off the chart to dead nuts in spec in under 20 seconds. That’s crazy good for a > 16 can IF (including the  filter).  It was an amazing feat that I’ve never seen equaled. 

Anything I’ve ever tried to do, you need to slow things down so much that the sweep is a bit of a pain to use. It works much better on wide band stuff than narrow.

Bob
KB8TQ

On Jul 27, 2014, at 6:45 PM, Roy Morgan <k1lky68 at gmail.com> wrote:

> 
> On Jul 27, 2014, at 2:25 PM, Bob Camp <kb8tq at n1k.org> wrote:
> 
>> Hi
>> 
>> Just to be clear - my focus was on the 455 Kc alignment rather than the 60 Kc. I’ve never seen a need to tweak the 60 Kc alignment unless a part was replaced. 
> 
> Bob,
> 
> OOPS, I guess I missed that part, then went on and on about the low IF.
> 
> Anyway, do have fun.  I wonder if you have done any sweep alignments.  I have a couple of sweep generators: one is an old militarily one from the 50’s.  The other is a much treasured General Radio model 1025 Standard Sweep Generator.  The one I would be better off having than these two monster things, is the HP small sweep generator (can’t think of the name of it just now)  nn06 or nn16 or some such number.
> 
> QUITE some time ago now I volunteered to write an update to the army Fort Devens school pamphlet called “Visual Alignment of the R-390 Receiver).  It’s quite antiquated.  But the Rouond Tuit for that project has not shown up yet, alas.
> 
> 
> Roy
> 
> Roy Morgan
> RoyMorgan at alum.mit.edu
> K1LKY Since 1958
>