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Hammarlund HQ-110c HF RECEIVER
HQ-110c Produced: 1958 - 1969
Produced in three ranges:
SN 7000 and up
Woody's 1966-1967 ham shack:
Above right: Woody's 1966-1967 ham shack.
(See additional photos below)
(1958) Johnson Adventurer transmitter,
(1962) Hammarlund HQ-110c receiver,
(1965) Allied Knight-Kit Star Roamer receiver
My grandfather's, Ken, (KIA WW2) 1930's Signal Electric lacquered brass Model R-63 hand key and
my 1956 Vibroplex Blue Racer bug.
My father, Ralph, had made the desk in woodshop while attending Ann Arbor (Michigan) High School in about 1936.
He had "donated" it for my shortwave listening (SWL) in about 1963 which continued throughout my amateur radio career to this day.
My grandfather, Arthur, signed and dated his new clock when he was 44-years old, in June 1932 - over 80-years ago.
CLICK HERE to email Woody
Hammarlund HQ-110c PDF
Manual (3.36 mb)
Hammarlund HQ-110c PDF Schematic (300 kb)
OTHER HAMMARLUND HQ-110c RESOURCES:
At the web page of:
The Hammarlund model HQ-110A is a HAM bands receiver for 6, 10, 15, 20, 40, 80 and 160 Meters.
Optional 2 meters VHF converter and "Telechron Auto-Timer" clock.
There are at least two variants:
This one here with a small metal tag that says HQ 110a between the two scales and one which has a metal tag on the front with "VHF" and below a silkscreen with "HAMMARLUND HQ 110 A".
This model has a pre-amp on 2 & 6 meters. We believe it is the last of the series.
Production Changes (by Bill Henry, Deland, FL, USA):
The HQ-110 was produced in at least 3 serial number ranges.
The first run includes serial numbers up to 4199;
the second run includes serial numbers from 5000 to 7000;
and the final run includes serial numbers above 7000.
The serial number can be found stamped into the rear apron of the chassis.
The major changes in the second serial run are in the area of V1 and V2 and in the BFO circuit.
The coupling arrangement between T1 and T2 was modified significantly, as were parts of the second mixer circuit.
The second mixer crystal was changed from a 3.49 Mc to 2.58 Mc.
Also, there were finally some further attempts at temperature compensation to help to reduce the inherent drift of the receiver.
In addition, the BFO circuit was changed considerably so that its output comes from the plate rather than from the cathode as previously done.
In the third serial run, there were further changes in the T1/T2 coupling as well as new changes in the RF stage and the second mixer.
Most notably, the Antenna coils are no longer gang-tuned to the mixer and local oscillator.
The antenna coils are now resonated by the antenna trimmer only, leaving the main tuning capacitor a 2-section variable, rather than a 3-section as it was previously.
According to a Product Addendum covering the second and third runs, 6 capacitors were added to improve stability in the high frequency oscillator and BFO sections; 2 coils were added to the second mixer and local oscillator to improve stability; and a resistor across the output transformer was added to provide an emergency speaker load.
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 1727 (first run)
Since 5 April, 2013:
All personal materials, comments, pictures copyright 1997-2014 R Linwood (4L RANCH)