[Hammarlund] HQ-170a intermittent RX problem on certain bands<100kc calibrator>

[Carl]

Hey Mike, how you been, its been a long time.

The 170 and any other Hammarlund using the 6C4 in that socket are known 
for problems. It often requires going thru several tubes to find a good 
one in that circuit, even NIB. You could also try a 6J6 with sections in 
parallel.

Carl
KM1H


----- Original Message ----- 
From: "Mike & Coreen Smith" <ve9aa at nbnet.nb.ca>
To: <hammarlund at mailman.qth.net>
Sent: Tuesday, January 20, 2009 4:38 PM
Subject: Re: [Hammarlund] HQ-170a intermittent RX problem on certain 
bands<100kc calibrator>


> Hi and Thanks Glen,
>
> It's been literally decades since I owned (well, used at least) a boat
> anchor w/ a Xtal Cal. but that's how I thought it must work.
> I appreciate your confirmation of my thoughts.
>
> This one is definately fubared in that respect then.  Fourty Meters 
> nearly
> pins the meter on the scale. EU BCB stns are all quite loud, as are 
> domestic
> CW signals.
>
> Most other bands barely even move the S-Meter and 6m does not, thought 
> it
> does "work" on 6.(barely, hi)
> 15m is dead as a nit. No detectable signals of any kind there
> whatsoever.--though I 'thought' I heard the xtal cal signal there one 
> time
> just as I turned the rig on from cold.......now I am doubting my own 
> memory
> as I only heard it the once.....hmmm, was the band switch on 
> 20m.....hi
> hi.....lovely to get old and forgetful, eh?!
>
> One of the guys @ work has a tube tester he's going to loan me, so 
> I'll get
> checking, but I fear something more serious---at least when it comes 
> to 6m.
> I'll be on the prowl for my own tube tester after prelim checks as I 
> also
> have a set of Heathkit mobile twins needing some work.
> (Cheyenne/Comanche).......then there's the large Victor 1930's 
> tombstone
> radio my wife has been bugging me about for about 20 yrs that I should 
> do
> something with !
>
> Cheers/73
>
> de Mike VE9AA
> dit dit
>
>
> Mike, Coreen & Corey Smith
> 699 Rte 616 Keswick Ridge
> NB
> Canada
> E6L 1T1
>  ----- Original Message ----- 
>  From: Glen Zook
>  To: hammarlund at mailman.qth.net ; Mike & Coreen Smith
>  Sent: Tuesday, January 20, 2009 11:48 AM
>  Subject: Re: [Hammarlund] HQ-170a intermittent RX problem on certain 
> bands
> (more questions/comments)
>
>
>  As for the signal strength of the calibrator:  Since you are starting 
> with
> a 100 kHz signal as you go higher in frequency the number of the 
> harmonic
> increases and with each increase in the harmonic number the signal 
> strength
> definitely goes down.
>
>  It is not unusual for the "S" meter to almost "pin" on 160 meters and 
> 80
> meters and barely move at 10 meters or 6 meters.
>
>  Glen, K9STH
>
>  Website:  http://k9sth.com
>
>
>  --- On Mon, 1/19/09, Mike & Coreen Smith <ve9aa at nbnet.nb.ca> wrote:
>
>  Let me ask this:
>  Using the 100kc Xtal calibrator as an internal signal source, should 
> the
> signal be gradually weaker as I move up in frequency?
>
>  On 40m it's nearly full scale, but all other bands are very low. 
> (most
> around s1-s3 or so......no visible S-meter reading on 6m however) On 
> 15m
> there is NO xtal cal signal at all, nor any from an external sig gen.
>
>
>
>


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