Bob Eckweiler - AF6C

OCARC “RF” Heathkit of the Month
Table of Contents:

Heathkit of the Month Articles Tech Notes
Miscellaneous Articles Repair Techniques
Early Heath Part #s Other Pages by AF6C

Find Updated Issues of “Heathkit of the Month”
(HOtM) Column Here.

Here are links to the Heathkit of the Month articles from RF, the newsletter of the OCARC. The first article was published in the February 2008 issue. Articles are usually added approximately one month after they are published in RF. If you are eager to read the article marked "Up Next" it is available in our current issue of the RF Newsletter available here.

If you have any corrections, or perhaps a Heathkit model you would like to see covered, please contact the author:

Additional “Heathkit” articles and Book Reviews.

Occasionally I author a Heathkit article unrelated to a specific kit or suite of kits. These I have added in their own index at the bottom of the page.

As I acquire books about Heathkit I sometimes review them.

Recently I wrote a Heathkit maintenance article unrelated to a specific kit. As more get written they will appear in a separate index titled Repair Techniques.

A Table of early “Heathkit” Part Numbers. (Circa 1947 - mid 1951).

While writing HOM #85 (The early 'O-series' oscilloscopes) I started a table of early Heathkit part numbers from the parts lists that came with some of the documentation I had. Later, when I came across other old manuals or schematics that had early part numbers I added them to the list. It is now ovwer 500 items in length. The system is somewhat convoluted and it was quickly getting out of hand. Sometime after 1/15/1950 Heathkit totally redid their parts list to the one most are familiar with. A discussion of the early parts list is discussed starting on page 4 of HOM #95. As more parts are added the list will be updated. You can find it here:

Heathkit Pre-1951 Parts List Current version 1.1.

Heathkit of the Month, and Bob's TechTalk articles are copyrighted material. They are free for Heathkit aficionados to read and enjoy and to copy and print for their own personal use.

Articles may be linked to through the index using the link below where xxx is the article HOM # 001, 097, M02 etc. Direct linking is allowed, but not recommended as the address may change.

http://www.w6ze.org/Heathkit/Heathkit_Index.html#Hxxx

Heathkit of the Month - Table of Contents

Listed are the Heathkits featured in each article. Other kits in the line are often mentioned, and sometimes described in detail. For example, in the V-7A VTVM article the VTVMs from the V-1 up to the V-7A and even some of its descendants are described.

HOM # Subject RF Issue
#102 Heathkit QM-1 #
(QM-1 'Q'- Meter circa 1952 - 1966)
Up Next
#101 Heathkit HD-1426
(Field Strength Meter - circa 1977 - 1981. Includes PM-1 and PM-2)
Aug 2020
HOM # Subject RF Issue
#100 Heath LNA-40 kit Rev. B
(Parasol including the Super Parasol, V Parasol, &
LNB-4: circa 1926 - ~1937)
Apr 2020
#099 Heathkit HD-20
(100 KC Crystal Calibrator, circa 1960 - 1975
Mar 2020
#098 Heathkit RC-1
(Radiation [Geiger] Counter, circa 1956 - 1961)
Feb 2020
#097 Heathkit SA-2040
(Legal-Limit Antenna Tuner - circa 1979 - 1983)
Jan 2020
#096 Heathkit IO-21
(3" Basic Oscilloscope - circa 1961-1971)
Nov 2019
#095 Heathkit A-1
(Heath's First Audio Hi-Fi Amplifier - circa 11/1947 - 8/1948)
Oct 2019
#094 Heathkit IP-27
(Regulated Low-Voltage Power Supply: 0.5-50V 1.5A
- circa 1967-1975)
Aug 2019
#093 Heathkit CS-1 Restoration
(The CS-1 'Condenser' Substitution Box benefits from modern,
smaller capacitors)
Jul 2019
#092 Heathkit SW-717
(HF Beginner SWL Communications Receiver - circa 1971-1982)
Jun 2019
#091 Heathkit SBA-300 VHF Converters
(SBA-300-3 6-Meter & SBA-300-4 2-Meter VHF Converters
for the SB-300 & SB-301 Receivers - circa 1964 - 1970)
May 2019
TechTalk Article #52
(This is the article The MILLER EFFECT and the CASCODE AMPLIFIER mentioned in HOM #92) for more Bob's TechTalk articles click here.)
May 2019
HOM # Subject RF Issue
#090 Heathkit GW-31
(FCC Part 15 Walkie Talkie, including GW-30 and GW-31A
circa 1960 - 1968)
Jan 2019
#089 Heathkit ‘O’ Series Oscilloscopes Part III
(The O-9 through the O-12 - circa 9/1953 - 11/1960)
Link to: O-series schematics and parts lists
Dec 2018
#088 Heathkit AW-1
(Audio Wattmeter, incl. AW-1U - circa 1953 - 1960)
Nov 2018
#087 Heathkit ‘O’ Series Oscilloscopes Part II
(The O-5 through the O-8 - circa 9/1949 - 9/1953)
Link to: O-series schematics and parts lists
Aug 2018
#086 Heathkit V6 VTVM Restoration Pt. II
(Major restoration of the V-6 VTVM)
Jul 2018
#085 Heathkit ‘O’ Series Oscilloscopes Part I
(The O-1, Heath's first Kit, through the O-4 - circa 7/1947 - 9/1949)
Link to: O-series schematics and parts lists
Jun 2018
TechTalk Article #51
(This is the article The Oscilloscope CRT mentioned in HOM #85.
This is a precursor to the upcoming Heathkit O-1 to O-4 Article in
June.) for more Bob's TechTalk articles click here.)
May 2018
#084 Heathkit V-6 VTVM Restoration Pt. 1
(Converting the 57-1 Selenium Rectifier to Silicon)
Apr 2018
#083 Heathkit HG10(B)
(Variable Frequency Oscillators: HG-10, circa 1961 - 1966, and HG-10B, circa 1967 - 1976)
Mar 2018
#082 Heathkit FMO-1
(FM Alignment Test Oscillator, circa late 1959 - early 1967)
Feb 2018
#081 Heathkit K-2
(All-Wave Regenerative Receiver, circa 7/1949 - 12/1949) Additional discussion
Dec 2017
HOM # Subject RF Issue
#080 Heathkit K-1
(All-Wave Regenerative Receiver, circa 1948 - 7/1949) and K-2
Nov 2017
#079 Heathkit VF-1
(HF VFO circa 1952 - 1961)
Oct 2017
#078 Heathkit IM-17
(Utility Solid-State Voltmeter - circa 1967) Includes IM-5217
Sep 2017
#077 Heathkit BC-1A
(AM Tuner - Hi-Fi - circa 1956 - 1960) Including BC-1.
Aug 2017
#076 Heathkit IT-121 Pt.II of II
(Transistor - FET Tester - circa 1972 - 1977)
See HOM #75 right below for further details.
Jul 2017
#075 Heathkit IT-121 Pt. I of II
(Transistor - FET Tester - circa 1972 - 1977) Including:
variant IT-2120, also IT-10 (including IT-27, IT-3127 variants), IM-30 (including IM-36 variant), and IT-18 (including IT-3118 variant).
Jun 2017
#074 Heathkit AA-14
(Solid State Stereo Amplifier - circa late 1966 - 1975)
Feb 2017
#073 Heathkit ID-29
(Automotive Tune-up Meter: Dwell, Tach, Voltmeter
circa 1969 - 1975)
Jul 2016
#072 Heathkit HW-22 Pt. II
(Single Bander Transceivers Includes HW-12 and HW-32.
Part II of II;)
Jun 2016
#071 Heathkit GU-1800
("Minimizer" Trash Compactor circa 1971 - '74)
Apr 2016
HOM # Subject RF Issue
#070 Heathkit HW-22 Pt. I
(Single Bander Transceivers Includes HW-12 and HW-32.
Part I of II;)
Feb 2016
#069 Heathkit SK-107
(Stereo Synthesizer, circa late 80s to the end - a "Starter Kit")
Jan 2016
#068 Heathkit IM-38
(AC VTVM, circa late 1969 to 1976)
Dec 2015
TechTalk Article #49
(This is the article AC Meter Scales mentioned in HOM #68)
for more Bob's TechTalk articles click here.
Dec 2015
#067 Heathkit IP-32
(HV voltage Power Supply, circa 1962, 1967, also PS-1 thru PS-4, IP-17 & IP2717)
Aug 2015
#066 Heathkit HD-1250 Meter Repair
(The meter used in the HD-1250 tends to stick after years of service. Here's how to repair it. Also HOM #MO2)
Jun 2015
#065 Heathkit GT-18/GT-101
("Boonie-Bike" & "Hilltopper", circa 1968 - 1974 - an April 1st special)
Apr 2015
#064 Heathkit VC-3
(O'Scope Voltage Calibrator, circa 1956 - 1962)
Mar 2015
TechTalk Article #47
(This is the article How FM Stereo Works promised in HOM #63)
for more Bob's TechTalk articles click here.
Mar 2015
#063 Heathkit AJ-14
(FM Stereo Tuner, circa 1965 - 1975)
Feb 2015
#062 Heathkit GR-78
(Portable Shortwave Receiver, circa 1969 - 1977)
Dec 2014
#061 Heathkit SG-8
(Signal Generator circa 1953 - 1961; also SG-6, SG-7,
& briefly G-5, RF-1 & IG-102)
Nov 2014
HOM # Subject RF Issue
#060 Heathkit SB-610
(Monitor Scope - circa 1967 - 1975. Also the HO-10)
Oct 2014
#059 Heathkit IG-72
(Audio Oscillator - includes the AG-9/A)
Sep 2014
#058 Heathkit HA-14
("Kompact" Kilowatt HF Amplifier - circa 1965 - 1968; also HP-14 and
HP-24 Associated Power Supplies)
Jul 2014
#057 Heathkit AA-32
(Stereo Hi-Fi Tube Amplifier - circa 1964 - 1971; also AA-13,
AA-23 Mono Amplifiers and AJ-13, AJ-53, and AJ-63 Tuners)
Jun 2014
#056 Heathkit ID-2295
(Relative Humidity Indicator - circa 1982 - 1992 also,
other weather instruments)
May 2014
#055 Heathkit GDP-5457
(Give-Away Flashlight - circa 1987 - an April 1st Special)
Apr 2014
#054 Heathkit HM-102
(HF Power Meter - circa 1970 - 1981; also HM-2102,
HM-2103, HM-2104/A, HM-2141 and HM-9)
Mar 2014
#053 Heathkit GD-48
(Metal Locator line - circa 1969 - 1985;
includes: GD-348, GD-1190, GD-1290)
Feb 2014
#052 Heathkit SK-211
(AC Line Voltage Monitor circa 1989 - 93)
Jan 2014
#051 Heathkit IG-4505
(Deluxe Oscilloscope Calibrator circa 1975 - 1990;
also VC-1, VC-2, VC-3, IOA-4510-1 and IG-4244)
Aug 2013
HOM # Subject RF Issue
#050 Heathkit EF-2
(Oscilloscope Trainer - A Heathkit Educational Course)
Jul 2013
#049 Heathkit SB-220
(2KW HF Amplifier; including the SB-221)
Jun 2013
#048 Heathkit HS-3860
(Laptop Computer; irca late 1989 - The 2013 April 1 article)
Apr 2013
#047 Heathkit AV-3
(AC Voltmeter; including AV-1, AV-2, IM-21, 1M-38 and IM-5238)
Mar 2013
#046 Heathkit GD-1776
(Programmable Thermostat; circa 1977 - 1980)
Feb 2013
#045 Heathkit FM-4
(Hi-Fi FM Tuner; circa 1949 - 1963; Including FM-1 - FM3, FM-4U and AJ-31)
Jan 2013
#044 Heathkit CT-1
("Capaci-Tester"; circa 1959 - 1962 and IT-22 1963 - 1967)
Dec 2012
#043 Heathkit SB-401
(HF Amateur Transmitter; circa 1967 - 1975; including the earlier SB-400)
Oct 2012
#042 Heathkit HD-1422-A
(Antenna Noise Bridge; circa 1985 - 1992; including HD-1422)
Aug 2012
#041 Heathkit OL-1
(3" Oscilloscope; circa 1954 - 1956; also IO-21, IO-17, IO-10 and EUW-25 3" O'scopes)
Jul 2012
HOM # Subject RF Issue
#040 Heathkit HP-13 Series
(Mobile Power Supply; cira 1963-1977 - includes GP-11, MP-1, HP-10 switching and vibrator power supplies for mobile amateur use)
Jun 2012
#039 Heath Craft F-2587K/M
(CraftWoodworks Candlesticks in Oak and Mahogany
circa 1981-1982)
Apr 2012
#038 Heathkit CS-1
(Capacitor Substitution Box and family, and DC-1 Capacitor
Decade Box and family - circa: 1952 - early 80s)
Mar 2012
#037 Heathkit AM-2
(SWR Meter. And the HM-11, HM-15 and more)
Jan 2012
#036 Heathkit SB-301
(And SB-300 HF Ham-band Receivers)
Dec 2011
#035 Heathkit RS-1
(Resistor Substitution Box and family, and RD-1 Resistor
Decade Box and family - circa: 1952 - 93)
Nov 2011
#034 Heathkit GC-1A
("Mohican" Portable Communications Receiver)
Oct 2011
#033 Heathkit SB-200
(And SB-201 Linear Amplifiers - circa: 1964 - 83)
Sep 2011
#032 Heathkit LG-1
(Laboratory signal generator and G-1, G-5, SG-6, SG-7,
and SG-8 - circa: 1953 - 62)
Aug 2011
#031 Heathkit HD-15
(Hybrid phone patch - circa: 1966 - 83; also HD-19, HD-1515,
and SB-630 and SB-634 console patches)
Jul 2011
HOM # Subject RF Issue
#030 Heathkit SB-Line Overview
(Early [circa: 1964 - 76] and late [circa: 1974 - 82] SB-line
of ham radio equipment)
Jun 2011
#029 Heathkit W-4AM
("Williamson" type Hi-Fi Amplifier; includes the whole family -
circa: - 1949 - 58)
May 2011
#028 Heathkit GU-1810
(Gasoline Powered Log Splitter circa: 1981 - 84)
Apr 2011
#027 Heathkit MP-10
(AC Power Inverter - circa: 1960 - 81)
Mar 2011
#026 Heathkit HP-23
(AC Power Supply HP23/A/B/C/E PS23 - circa: 1964 - 83;
Also UT-1, and HP-20)
Feb 2011
#025 Heathkit AT-1
(First Heath Amateur Transmitter - circa: 1953 - 56)
Jan 2011
#024 Heathkit QF-1
("Q" Multiplier - circa: 1955 - 60)
Dec 2010
#023 Heathkit HD-1416
(Code Practice Oscillator - circa: 1975 - 91)
Nov 2010
#022 Heathkit CR-1
(Crystal Radio - circa: 1957 - 62)
Oct 2010
#021 Heathkit HD-4040
(Packet Radio Terminal Node Controller - circa: 1985 - 87)
Sep 2010
HOM # Subject RF Issue
#020 Heathkit HN-31/31A Updated 8/12/2016
(1KW Dummy Load - circa: 1961 - 91)
May 2010
#019 Heathkit V-7A Updated 7/9/2016
(Vacuum Tube Voltmeter - circa: 1956 - 61, Includes V-1, V-2, V-3,
V-4, V-4A, V-5, V-5A, V-6 & V-7)
Dec 2009
#018 Heathkit IT-1
(Isolation Transformer - circa: 1953 - 60)
Nov 2009
#017 Heathkit TX-1
(Apache HF AM/CW Transmitter - circa: 1959 - 64)
Jul 2009
#016 Heathkit HD-1420
(VLF Converter - circa: 1986 - 91)
Jun 2009
#015 Heathkit C-7
(Enjoy a little April fool's humor)
Apr 2009
#014 Heathkit RX-1
(Mohawk AM/SSB/CW Ham Band Receiver - cira: 1958 - 64)
Mar 2009
#013 Heathkit AC-1
(Antenna Coupler - circa: 1953 - 56)
Feb 2009
#012 Heathkit GD-1003
(Portable Electronic Air Filter - circa: 1973 - 78)
Jan 2009
#011 Heathkit HX-20/HR-20
(HF SSB/FM Amateur Radio Mobile Twins - circa: 1962 - 64)
Dec 2008
HOM # Subject RF Issue
#010 Heathkit MR-1/MT-1
(HF AM/CW Mobile Twins: Cheyenne Xmtr. - Comanche Rcvr. -
circa: 1959 - 62)
Nov 2008
#009 Heathkit IT-12
(Signal Tracer - circa: 1962 - 77, includes T-1, T-2, T-3, T-4 & IT-5283)
Oct 2008
#008 Heathkit DX-100/100-B
(AM/CW HF Amateur Transmitter circa: 1955 - 60)
Sep 2008
#007 Heathkit HD-1250
(Solid-State Dip Meter - circa: 1975 - 91)
Aug 2008
#006 Heathkit HD-1424/1424-A
(Active Antenna - circa: 1985 - 91)
Jul 2008
#005 Heathkit GH-17/17-A
(Soldering Iron - circa: 1966 - 83)
Jun 2008
#004 Heathkit CA-1
(Conelrad Alarm - circa: 1957 - 60)
May 2008
#003 Heathkit DX-40
(AM-CW Amateur HF Transmitter - circa: 1958 - 60)
Apr 2008
#002 Heathkit IT-11
(Capacitor Checker - circa: 1961 - 88)
Mar 2008
#001 Heathkit GR-121
(AM Clock Radio - circa: 1963 - 65)
Feb 2008

Repair Techniques - Table of Contents

HOM # Subject RF Issue
#MO2 Heathkit HD-1250 Meter Repair
(Repairing the meter in the HD-1250 Dip Meter - also HOM #66)
Jun 2015
#MO1 Heathkit Slide Switch Repair
(Repairing the Stackpole slide switches used in many Heathkits such as the HM-102)
Aug 2014

Other Heathkit Articles by the Author - Table of Contents

HOM # Subject RF Issue
#A02 Heathkit Receives Last Coffin Nail
(The last of Heath Co. Goes Bankrupt.)
Aug 2012
#A03 Book Review:
Heathkit - Test Equipment Products
By Chuck Penson - WA7ZZE
Jul 2013
#A04 Book Review:
Heathkit - A Guide to the Amateur Radio Products
By Chuck Penson - WA7ZZE
Oct 2017
#A05 Book Review:
Heathkit - Hi-Fi and Stereo Products
By Chuck Penson - WA7ZZE
Sep 2018

Various Tech Notes - Table of Contents

HOM # Subject Author
#T01 Heathkit Document:
Partial Conversion of O-7 Oscilloscope
(Improving the vertical amplifier response)
Heathkit

Other Collections of Pages

Other Pages
Index of TechTalk Articles by AF6C
Electronic Calculator Pages Index by AF6C
Home Top

This page last updated on 15 September 2020
OCARC S-Mail: P.O. Box 3454, Tustin, CA 92781-3454

Valid HTML 4.01 Transitional   Valid CSS!