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Woody's
Hammarlund HQ-170a-VHF HF RECEIVER
W0UI





This HQ-170a-VHF model was produced between 1964 and 1967
according to 
http://www.radiomuseum.org/r/hammarl_mf_hq_one_seventy_hq_170a_vh.html  

Woody purchased this receiver off of eBay in November 2013.
It is apparently an earlier version of the HQ-170a-VHF receiver
as there is no VHF plaque as seen on most of these units.


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Hammarlund HQ-170a-VHF (not the older 170 model)  
Owners Manual
Converter-PreAmp_Service Manual


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PANEL DIFFERENCES 
BETWEEN OLDER HQ-170 and NEWER HQ-170a (VHF)
Left: HQ-170  --  Middle and Right: HQ-170a-VHF


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THE EXTERIOR




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ABOVE THE CHASSIS


  
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To enable the 2-meter receive section
pull out the Audio Frequency (AF) / Volume Control


This will enable the 2-meter receiver component that sits prominently in the rear center of the chassis.
Below is that receiver section found on the HQ-170a-VHF receivers.
 

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UNDER THE CHASSIS

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YouTube Hammarlund HQ-170a Troubleshooting by K7PP 
- Part One - Part Two - Part Three - Part Four - Part Five



WARNING!! 
There are High Voltages with enough punch to easily kill you 
exposed all over inside these old rigs
both above and below the chassis.
The capacitors can hold a lethal charge 
well after voltage is turned off and the rig is unplugged. 
Make sure to bleed off capacitors with an insulated and grounded screw driver 
before touching anything 
even after the unit is physically unplugged from the AC outlet.

Remember the old ham radio and electronics practice... 
Work on the radio one handed leaving one hand behind your back.
If you have both hands inside the unit and accidentally touch a lead or brush a capacitor
current could potentially pass through your body and stop your heart.

Always instruct others to turn off the circuit breaker 
or unplug the radio 
before touching you if you are bit else they might be electrocuted, too.




SN  (not found on chassis)

Since 15 November, 2013:


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All personal materials, comments, pictures copyright 1997-2014 R  Linwood (4L RANCH)