[Hammarlund] HQ-129-X Questions

[Richard Knoppow]

    I would have to fire it up to measure the error on the band 
spread dial, been too long for my memory. The main tuning is not 
too bad. The alignment procedure followed the book. What puzzles 
me is that the error is not constant with the band. Also, I get 
some coupling from the bandspread on the broadcast band. The 
bandspread cap should be shorted out there. Maybe a band switch 
problem. I did replace the cap there. I have had this thing on 
the back burner for quite a while. I think I still have a full 
set of caps to replace all the paper caps and will have to start 
with that. If I can find suitable replacements for the dials in 
the HQ-120-X I can compare the performance. Anyway, I want to get 
it working. If the dials are the same as those in the later HQ 
receivers it would make it a lot easier to find them.

On 5/29/2019 7:11 PM, D C _Mac_ Macdonald wrote:
> If I remember the general procedure for getting tracking most accurately, you adjust coils at the low frequency end of each band and the trimmer capacitors at the high frequency end.
> 
> The alignment instructions SHOULD designate the standard frequencies for those alignment instructions.  If you can't bring alignment in at those frequencies, try doing it at frequencies below AND/OR above the "standard" frequencies.  You should be able to get at least a reasonably satisfactory tracking.
> 
> 73 de Mac, K2GKK/5​
> Since 30 Nov 1953​
> Oklahoma City, OK​
> USAF, Retired ('61-'81)​
> FAA, Retired ('94-'10)​
> 
> 
> ________________________________
> From: hammarlund-bounces at mailman.qth.net <hammarlund-bounces at mailman.qth.net> on behalf of Richard Knoppow <1oldlens1 at ix.netcom.com>
> Sent: Wednesday, May 29, 2019 20:27
> To: hammarlund at mailman.qth.net
> Subject: Re: [Hammarlund] HQ-129-X Questions
> 
>      Thank you this is really helpful. How good is the bandspread
> calibration? Mine is very far off. I've centered the capacitor
> plates and tried all sorts of other things. I can't figure it
> out. I have been told the dials are pretty accurate (considering
> the age). The error is progressive.
>      I have a set of plastic film caps to replace the original
> paper ones, perhaps that will make a difference. The original
> caps are green molded body with paper labels. The ones I tested
> were not too bad. However, because of the mechanical mis fit and
> some other things I wonder at the provenance of this thing. I
> wonder if the dials from the later receivers would work in the
> HQ-120-X. If they are the same I can get that to work and see how
> the two compare. While there were a number of changes between
> them they are essentially the same design.
> 
> On 5/29/2019 6:09 PM, Jon Teske via Hammarlund wrote:
> 
> 
> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
> ______________________________________________________________
> Hammarlund mailing list
> Home: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Fhammarlund&amp;data=02%7C01%7C%7Cd3019c014ee44ef1eb8c08d6e49e0f09%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636947764836104293&amp;sdata=qJnHXzkKdjgKijwDwK8AgcLHD0E212kXCIjidzjxnOk%3D&amp;reserved=0
> Help: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&amp;data=02%7C01%7C%7Cd3019c014ee44ef1eb8c08d6e49e0f09%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636947764836104293&amp;sdata=7v1XEFL1m%2FcV1BYkrCMr3O2AOP9toC0WvT1HIgojx38%3D&amp;reserved=0
> Post: mailto:Hammarlund at mailman.qth.net
> 
> List Administrator: Gary Harmon, K5JWK
> ** For Assistance: gharmon at idworld.net **
> 
> 
> This list hosted by: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net&amp;data=02%7C01%7C%7Cd3019c014ee44ef1eb8c08d6e49e0f09%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636947764836104293&amp;sdata=GIlY%2BFDIG2%2F%2BFIUqIH88qGVEr5VuNBIVLxjzwKF6qJk%3D&amp;reserved=0
> Please help support this email list: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&amp;data=02%7C01%7C%7Cd3019c014ee44ef1eb8c08d6e49e0f09%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636947764836104293&amp;sdata=8AIwyoUU95vYqcNCXoEtYQSzYfBR8SG1Q%2BkYehe8TeY%3D&amp;reserved=0
> ______________________________________________________________
> 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: Gary Harmon, K5JWK
> ** For Assistance: gharmon at idworld.net **
> 
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> 

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL