[Hammarlund] HQ-140X questiom

[WQ9E at btsnetworks.net]

The only addition I have to Kim and Carl's excellent advice is to make sure the band spread (and general coverage) caps are properly indexed to the dial before starting.  I don't know if people remove the dials for cleaning or for other reason but I have often found dials that were not carefully reinstalled such that the capacitor mesh is not correct for the indicated dial position.  

Some models specify this clearly but in many cases the marked part of the dial covers just under 180 degrees of capacitor rotation.  Where the instructions don't specify I place the bandspread dial so that the "set" mark occurs when the BS capacitor just hits minimum mesh. For the main dial (again if not clearly specified) I set the dial where the low end mark occurs a hair before full mesh.  Of course if the dials are calibrated for exactly 180 degrees of capacitor movement then it is pretty clear.

There is nothing quite like the joy of going through most of an alignment and then finding out the band spread cap wasn't properly indexed :(

Rodger WQ9E

-------- Original Message --------
> From: "Carl" <km1h at jeremy.mv.com>
> Sent: Sunday, October 09, 2011 9:47 AM
> To: "Dan Cotsirilos" <k9dtc at comcast.net>, <Hammarlund at mailman.qth.net>
> Subject: Re: [Hammarlund] HQ-140X questiom
> 
> As Kim said plus thats also a good sign of having the oscillator on the 
wrong side. It must be 455kc above the signal on the 4 lower bands and 455kc 
below on the 2 highest bands. The BS dial must be set at 100. The manual is 
very specific about all this.

The GC tuning cap must have its plates centered and this is adjustable. 
Often uninformed little fingers mess this up and then sell the radio. The BS 
cap is also adjustable.

Band 1 is a perfect place to test linearity as there are often carriers 
available every 10kc, do it with the BFO properly aligned and turned on. If 
the tracking is excellent the GC cap is aligned.

The above holds true with all Hammys from the HQ-120 foreward using those 
capacitors BUT the 160 uses double conversion and the oscillator is always 
on the high side.

Carl
KM1H

----- Original Message ----- 
From: "Dan Cotsirilos" <k9dtc at comcast.net>
To: <Hammarlund at mailman.qth.net>
Sent: Sunday, October 09, 2011 8:39 AM
Subject: [Hammarlund] HQ-140X questiom


>I just aliened shortwave bands on this radio. When the ends of each band 
>are right on the money the center is off about 100 kcs or more off. I can't 
>remember am I expecting too much for analog or..........?
>
>
> Dan K9DTC
>
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