[Boatanchors] FS: Heathkit QM-1 Meter
Bry Carling AF4K
bcarling at cfl.rr.com
Wed Oct 21 15:31:17 EDT 2015
Heathkit QM-1 meter in excellent condition with original manual
Beautifully cared for by a gentleman who worked at a calibration lab.
Tests components at operating frequency-150 kc to 18 mc
Large 4½" 50 ua meter-easy to read dial scales
Measures Q, L, and distributed capacity of coils
No special alignment equipment required-test coil and manual included
Metered oscillator output for constant injection
The Q meter is not just a "prestige" instrument to be dusted off each morning when opening
the shop or lab. It is fully capable of performing many tasks in a matter of minutes that
ordinarily require considerable mechanical and mathematical dexterity. Originally a Q meter
was out of financial reach of the average service shop but now Heathkit ingenuity has
brought it into line.
Suspected components and parts being developed or manufactured can be tested at
frequencies at which they normally are used (150 kc to 18 mc). Wide ranges of inductance,
capacitance and Q will cover practically all values encountered. All indications are read
directly on a large 4½", 50 microampere, panel-mounted meter. Surprisingly easy to use, the
model QM-1 will take the guesswork out of your electronic efforts.
The Heathkit Q Meter uses a 12AT7 oscillator with pre-wound coils to obtain the full
frequency range on four bands. Oscillator output is metered to provide constant injection. A
complete VTVM circuit is used as a resonance indicator, using a 6AL5 twin diode and a
12AU7 VTVM amplifier. Voltage regulated and transformer operated power supply utilizes a
6X5 full wave rectifier and an OD3 regulator tube. All other components are of the highest
Behind the attractive charcoal gray panel with white lettering is a well laid out and
factory-formed chassis. No "extras" are required to build or operate this instrument. A special
test coil is provided for calibration purposes.
Specifications: Frequency: 150 kHz to 18 MHz on 4 bands. Inductance: 1 microhenry to 10
millihenrys. Q: 250 Full scale x 1 or x 2. Capacitance: Actual 40 mmf-450 mmf; Effective 40
mmf-400 mmf; Vernier ± 3 mmf. Tubes: 1-12AT7, 1-6AL5, 1-12AU7, 1-6X5, 1-0D3/VR150.
Power Requirements: 105-125 VAC, 50-60 cycles, 30 watts.
Dimensions: 8" high x 17" wide x 6" deep.
Complete with manual etc.
Available for $90.00 plus shipping.
Please contact me off the list to arrange purchase or for
pictures, details etc.
73 - Brian Carling, AF4K
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