[Hammarlund] Unstable Oscillator adjustments in the HQ-180

[K3PID]

Actually the 180 has some of each...  go figure!  and there are several 
incorrect references to top and bottom cores in the manual.. but as I said I 
have it working pretty well now so I will slap my hand if I get the urge to 
"tune" again hi hi When I started on it every adjustment screw on the thing 
had been "adjusted" by someone, what a mess! It is serial number 293

Thanks to all for the input.
Ron H. K3PID



-----Original Message----- 
From: Roger D Johnson
Sent: Sunday, February 14, 2016 2:52 PM
To: hammarlund at mailman.qth.net
Subject: Re: [Hammarlund] Unstable Oscillator adjustments in the HQ-180

I can't remember if the Hammarlund receivers have a hex core tuning slug or 
a
screwdriver slot. I think it's hex.

One thing that can cause tuning flakiness is a piece of slug broken off and 
rattling
around in the can.

73, Roger


On 2/12/2016 2:22 PM, Richard Knoppow wrote:
>    At one time I had a long ceramic adjustment tool with slot screwdriver 
> ends. I may still have it but it disappeared after moving some stuff to 
> storage.  It was very useful. For one thing it would reach into equipment 
> that nothing else was quite satisfactory for such as my General Radio 1001 
> signal generator. If the tip broke I could grind it back to shape just as 
> with a metal screwdriver.  It was also non-reactive, i.e., could be used 
> to adjust oscillators, etc, without pulling the frequency.
>
> On 2/12/2016 8:59 AM, k2cby wrote:
>> The best investment I ever made was a set of ceramic screwdrivers. They 
>> are
>> a Japanese import, and you can find them on eBay. There are two 
>> downsides:
>> (1) The blades are small and spec'd in mm - read carefully before you 
>> buy;
>> and (2) the blades are very short - 1-1/2 inches or so (but you might be
>> able to cur away the handle and attach the blade to a longer shaft).  The
>> good thing is that the ceramic blades are very strong, don't chip or 
>> break,
>> and are of course completely transparent to electrical and magnetic 
>> fields.
>>
>>
>> Miles B. Anderson, K2CBY
>> 16 Round Pond Ln.
>> Sag Harbor, NY 11963
>>
>> k2cby at optonline.net
>>
>>
>>
>>
>>
>> ______________________________________________________________
>> Hammarlund mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/hammarlund
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Hammarlund at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
______________________________________________________________
Hammarlund mailing list
Home: http://mailman.qth.net/mailman/listinfo/hammarlund
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Hammarlund at mailman.qth.net

List Administrator: Duane Fischer, W8DBF
** For Assistance: dfischer at usol.com **


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html