When preparing this webpage from the 1982 Heathkit
Christmas catalog, I decided it was a good excuse to clean and re-calibrate my personal
IM−17 Utility Solid−State Voltmeter (shown below). It is still in good-as-new condition.
The accuracy and precision is very good, with consistent meter readings when changing
scales. The manual suggests using a 1.5 volt dry cell battery for the DC calibration
and the 120 volt wall socket for the AC calibration, if no better sources exist.
A kit-built 10 MHz bandwidth oscilloscope I assembled many moons ago specified
the same two types of calibration sources. Fortunately, I had sources a little better
than a battery and a wall socket, and unlike the earlier exercises, I now have a
good quality digital multimeter to verify the voltage levels (and better sources).
The IM−17 is a strange beast in that the AC and resistance measurements are made
using the red and black leads, and the DC measurement is made using the black and
gray leads. The gray lead is shielded. An auxiliary jack is provided for using a
Heathkit high voltage probe or a Heathkit RF voltage probe (neither of which I own).
Also, the IM−17 originally used a 1.5 V carbon C-cell and an 8.4 V mercury
cell (no longer manufactured due to hazard reasons), but now a standard 9 V
transistor battery is being used successfully in place of the 8.4 V cell. The
manual a 9 V battery can be substituted, but the lifetime will be shorter and
the meter "zero drift" could be greater.
Heathkit Christmas 1982 Catalog
Heathkit Test Instruments
Heathkit 1982 Christmas Catalog, p51
This is my Heathkit IM−17 Utility Solid−State Voltmeter
Heathkit IM−17 Plastic Case
Heathkit IM−17 Internal Components & Wiring (back)
Heathkit IM−17 Internal Components & Wiring (side)
Heathkit IM−17 Kit Contents
Accuracy and economy are yours with easy-to-build Heathkit Test Instruments
Portable, Versatile VOM
Single test probe makes all measurements quickly:
The extremely versatile Heathkit IM-521S VTVM features seven DC voltage, rms
and peak-to-peak AC voltage and resistance ranges. Ideal for use with solid-state
and digital equipment.
You can measure: 0-1500 volts DC and rms volts AC, 0.4 to 4000 peak-to-peak volts
AC and 1 ohm to 100 megohms of resistance. Offers ±3% DC accuracy and ±5%
AC accuracy; precision network resistors (with 1% accuracy) for reliable, precise
Wide 25 Hz 10 1 MHz, ± 1 dB frequency response! Allows you to conduct
a wide variety of AC measurements. A large, 4.5" color-coded 200 μA meter movement
and scale makes delicate readings a snap.
In addition 10 its practicality, you save by building it yourself the easy Heathkit
way! The step-by-step manual shows you how. Uses 120/240 VAC, 50/60 Hz power and
one 1.5 VDC "C" cell (not included). Measures 7 3/8" x 4 11/16 W x 4 1/4" D (18.75
x 11.91 x 10.8 cm).
Kit 1M-5218, Shpg. wt. 5lbs 77.95
IM-5218 Specifications: Meter Scales: DC and AC (rms) Voltage: 0-1.5, 15, 50,
150, 500, 1500 V full scale. AC (p-p) Voltage: 0.4, 14, 40, 140, 1400, 4000 V full
scale. Resistance: 10 ohm center scale x1, x10. x100, x1000, x10k, x1 Meg. Input
Resistance: 11 megohms. 1 megohm in probe.
Bench-Type VTVM for the Shop or the Lab
Always ready for service: The IM-5228 is a professional looking, bench-type version
of the popular IM-5218 VTVM. In addition to features found on the IM-5218, the IM-5228
also ensures ease of use with all calibration controls centrally located on the
front panel. You can measure 0-1500 rms VAC/VDC and 0.1 ohm to 1000 megohms. ±3%
DC voltage accuracy, ±5% AC voltage accuracy. Requires one 1.5 VDC "C" cell,
not supplied. Operates on 120/240 VAC, 50-60 Hz. Rugged, handsome cabinet measures
a compact 5" H x 12 11/16" W x 4 3/4" D (12.7 x 33.23 x 12.07 cm).
Kit 1M-5228, Shpg. wt. 6lbs 77.95
PKW-4, Wired Replacement Probe for IM-5218 or IM-5228 VTVMs, Shpg. wt. 1 lb.
IM-5228 Specifications: DC Voltage: Input Resistance: 11 Megohms (1 Megohm in
probe) on all ranges. Circuit: Balanced bridge (push-pull) using twin triodes. AC
Voltage: Frequency Response: 25 Hz - 1 MHz, ± dB (800 ohm source, referred
to 60 Hz). Input Resistance and Capacitance: 1 megohm shunted by 40 pF, measured
at input terminals 1200 pF at probe tip).
Wide-range Heathkit Portable FM Deviation Meter $149.95
• Check operation of FM transmitters and signal generators
• Two front panel jacks for easy oscilloscope hook-up
• Uses battery or At power
Easy-to use: All controls and jacks on the Heathkit IM-4180 are located right
on the front panel for easy access. You can select from four deviation modulation
ranges just by pressing a pushbutton. Ranges available for use are from 2 to 75
Hz. Lock in UHF FM signals with the convenient coarse and fine tuning controls.
Measures peak FM deviation between 25 and 1000 MHz. An 8 ohm jack allows you to
connect a speaker or a pair of headphones. Controls are provided to allow you to
select the appropriate de-emphasis for audio signals. Easy to read meter. 5" H x
10.31" W x 7.19" D. Requires ten 1.5 VDC "AA" cells (carbon-zinc, alkaline or nickel-cadmium
- not included) or the optional IMA-4180-1 Battery Charger-Eliminator below.
Kit 1M-4180, Shpg. wt. 7 lbs. 149.95
Kit IMA-4180-1, Battery Charger-Eliminator for IM-4180, Shpg. wt. 2 lbs. 29.95
Swiveling Telescopic Antenna. Monitor transmitter/generator performance without
physical connection to the IM-4180.
SMA-2400-1, Assembled, Shpg. wt. 1 lb 9.95
Alaska, Hawaii and Michigan Residents: call 616-982-3411
Portable IM-5217 VOM for Use Anywhere
Perfect for in-field use by car buffs. campers, boaters, others: Four voltage
and resistance ranges make the Heathkit IM-5217 Portable VOM ideal for making all
common measurements. It's easy to build and easy to use. Measures 0-500 Volts AC
or DC (function switch allows measurement of AC and DC without changing test lead
connections) and 1 ohm-1 megohm. High input impedance avoids circuit loading. Wide
frequency response for audio measurements. Checking semiconductors is a breeze with
a special 1.5 Volt ohmmeter. Requires two 9 VDC cells and one 1.5 VDC "C" cell (not
included). Attractive, durable carry-along cabinet measures 5 3/8" H x 9 3/8" W
x 9" D (13.67 x 23.83 x 22.86 cm).
Kit IM-5217, Shpg. wt. 41bs. 39.95
Hand-held Digital Capacitance Meter
Hand-held Digital Capacitance Meter features auto-ranging, leakage detection
• Measures up to 199.9 mF with +0.2"10 basic accuracy, automatically selects
proper measuring range $157.95
• Built-in polarized "Kelvin" test sockets for more accurate capacitance
• Detects leaky capacitors with special circuitry
• Large 3 1/2-digit Liquid Crystal Display (LCD)
• Hand-held meter uses standard 9 VDC battery
The compact IT-2250 measures capacitance from 0 pF to 199.9 mF. Measuring all
types of capacitors (mica, glass, paper, polystyrene, mylar, electrolytic, air-gap,
ceramic and others), an auto-ranging feature automatically selects the correct range
of measurement from a choice of ten ranges. The capacitance measurement is then
shown on its 3 1/2-digit LCD. Four LEOs indicate unit of measurement (pF, nF, μF
"Kelvin" terminal design permits measurement directly at the capacitor leads
to minimize error. And a special zero control allows for the elimination of stray
capacitance in the instrument.
For measuring electrolytic and other capacitors with a low operating voltage,
the IT-2250 supplies a low test voltage (superimposed on a low bias voltage). A
remote cable lets you test capacitors that can't be connected directly.
Another key feature of the IT-2250 is its ability to detect a leaky capacitor.
A nomogram is provided so you can translate the readings you obtain, using the two
separate leakage switches, into approximate values of shunt or internal capacitor
Protection from excessive current is provided by clamp diodes and a 1/4 Amp fuse
when the IT-2250 is turned on, and by a 2.2 ohm, 2 Watt resistor across the input
jacks when the instrument is turned off.
Uses 9 VDC battery, or 120 VAC line current with optional PS-2350 (below).
Kit IT-225O, Shpg. wt. 3lbs 157.95
IMA-2215-1, Leather Carrying Case for IT-2250, Shpg. wt. 1 lb. 14.95
PS-2350, 120 VAC Battery Eliminator, Shpg. wt. 1 lb 7.95
IT-2250 Specifications: IMAGE HERE
Posted August 26, 2020