Heathkit

Build it yourself, understand it forever

History

Key Facts

Legendary Products

Heathkit AR-15 (1950s-1960s)

Heathkit AA-151 (1960s)

Heathkit AA-100 (1950s-1960s)

Heathkit GR-54 (1960s)

Sound Signature

Heathkit's tube-era equipment delivers the classic warm, musical sound of 1950s and 1960s American hi-fi. The AA-151's EL84 output tubes produce a sweet, intimate midrange with gentle treble that makes vocal recordings particularly engaging. At 15 watts per channel, it is not a powerhouse, but paired with efficient speakers it creates a listening experience that draws you into the music rather than overwhelming you with volume.

The solid-state models from the late 1960s and 1970s offer a different character — cleaner, more neutral, and with better bass control. What unites all Heathkit audio equipment is the quality of the components specified in the original designs. Heathkit's engineering department took their reputation seriously, and the parts quality in their kits often exceeded what factory-built competitors used at the same price points. A well-assembled Heathkit sounds as good as its design allows, which in the case of the best models is very good indeed.

Collecting Heathkit

Heathkit collecting is unique because build quality varies with the builder. A carefully assembled kit with clean solder joints and proper component placement sounds and works as well as a factory unit, while a poorly assembled example can be a headache. Factory-assembled Heathkits are rare and command significant premiums — most were sold to schools and institutions. The AA-151 tube integrated amplifier and the AA-100 are the most sought-after audio models.

Complete kits with original manuals, schematics, and packaging are the collector's dream — Heathkit's documentation was legendary in its thoroughness and clarity, and the manuals themselves are fascinating artifacts of mid-century American technical culture. The AR-15 three-way speaker kit offers excellent sound from a design that was genuinely competitive with commercial speakers of its era. The GR-54 FM tuner rounds out a complete vintage Heathkit system. When buying, inspect solder joints carefully — clean, shiny connections are a good indicator that the original builder took care with the assembly.

Competitors & Comparisons

Amplifiers

• A5 — Heathkit A5C mono-block tube amplifier, 10W into 16 ohms, 6L6G outputs — a little-documented top-of-line home amp sharing the A9 theater amp circuit.
• AA-111 (1976) — The Heathkit AA-111 (1950s–early 1960s) is a tube-based stereo power amplifier kit known for its ULTRA-LINEAR® design and sweet-sounding EL84 output tubes.
• AA-111 14W/Ch — Heathkit AA-111 stereo tube power amplifier, 14W/ch, with ULTRA-LINEAR circuit and EL84 output tubes. Companion to AA-11/AA-141 preamps, c. 1961-63.
• AA-15 (1957) — The Heathkit AA-15 (1968–1969) was the company's top-of-the-line solid-state integrated amplifier, praised for its warm, powerful sound and DIY accessibility.
• AA-151 (1962–1967) — The Heathkit AA-151 is a 1960s DIY tube stereo integrated amplifier — 14W per channel, Ultra-Linear circuit, tan vinyl case, sold as a kit.
• AA-161 (1957) — The Heathkit AA-161 (1960s) is a kit-built monophonic tube amplifier offering 14 watts, EL84 push-pull output, and vintage DIY charm.
• AA-1640 (1975) — Heathkit AA-1640 (1975): a 58-lb, 200W/ch stereo power amplifier kit with 16 output transistors and 12 lb of diecast heat sinking.
• AA-1800 Stereo — Heathkit AA-1800 stereo amplifier, 125W RMS/ch into 8Ω. A modular preamp/power amp design from the early 1980s, documented mainly through spec sheets.
• AA-21 (1960s) — Heathkit AA-21 solid-state integrated stereo amplifier kit from the 1960s — 70W/ch into 8Ω, 30 lbs, sold unassembled. Covers production years.
• AA-21D (mid-1960s) — Heathkit AA-21D solid-state stereo amplifier kit, mid-1960s. 26-transistor circuit, 70W RMS per channel claimed, tape-head input, 4/8/16 ohm taps. Power specs conflict across Heathkit catalogs.
• AA-22 (c. 1964–1965) — Heathkit AA-22: 40-watt (20/chan) transistor stereo integrated amp kit, c. 1964–65, $99.95, praised by Julian Hirsch in HiFi/Stereo Review.
• AA-32 (1960s) — The Heathkit AA-32 is a $39.95 build-it-yourself integrated tube amp from the 1960s. Eight watts, four 6GW8 outputs, and a sleeper reputation.
• AA-50 (1958) — A classic vacuum tube audio amplifier kit from the golden era of DIY electronics, the Heathkit AA-50 offered hobbyists an affordable and educational entry into high-fidelity sound.
• AD-19 (1975) — A high-quality passive audio distribution amplifier designed for multi-room audio setups in vintage home audio systems. With full specifications.
• AD-27 (1969) — The 1969 Heathkit AD-27 Compact Stereo Center packs an FM stereo tuner, 4-speed BSR McDonald 500-A changer, and 10-watt-per-channel solid-state amp into a walnut tambour-door cabinet.
• AJ-1510 (1975) — The Heathkit AJ-1510/AJ-1510A (1972) was one of the first digital PLL FM tuners, featuring Numitron displays, punch-card presets, and hard-wired logic—rare.

Computers

• H-11 — Heathkit H-11 (1977-1982): a 16-bit kit computer based on the DEC LSI-11, priced at $1,295 as a kit. A historically significant but commercially unsuccessful early personal computer.
• H-8 — Heathkit H-8 (1977-1980): 8-bit microcomputer kit with Intel 8080 CPU, 4KB RAM expandable to 32KB, built-in 12-inch CRT, and full ASCII keyboard.

Crossovers

• AR-1502 (1975) — A high-performance passive loudspeaker crossover designed for DIY audio enthusiasts seeking precision and customization in their speaker systems.
• AR-1503 (1975) — A high-performance passive audio crossover designed for DIY speaker systems, part of Heathkit's renowned line of audio kits.

Ham Radio

• HG-10B — The Heathkit HG-10B is a vacuum-tube variable frequency oscillator (VFO) for amateur radio, introduced in 1966 as the successor to the earlier HG-10.

Processors

• AA-2010 (1975) — The Heathkit AA-2010 (1975) is a 4-channel quadrophonic integrated amplifier with 50WPC output. Specs, build notes, and collector pricing for this DIY solid-state rarity.

Radios

• GR-151A (late 1960s) — Heathkit GR-151A — an early 6-transistor AM radio kit from the late 1960s, sold for $22.00 with a 4x6 speaker and tan leather case. Little else is documented.

Receiver

• GR-25 — Heathkit GR-25 — 25-inch color TV kit with 27 tubes, RCA Hi-lite rare-earth CRT, hinged chassis, and $469.95 kit price. A 1966 build-it-yourself color set the audio press rated above assembled rivals.

Receivers

• AR-14 (1966–1968) — Heathkit AR-14 (1966–1968): $99.95 all-transistor FM stereo receiver kit, 10W/ch continuous, 5 µV FM sensitivity. A budget Heathkit covered mainly by its own ads.
• AR-1500 (1975) — A high-fidelity, DIY stereo receiver kit from Heathkit, combining tuner, preamp, and power amp in one build-it-yourself package.
• AR-1500A — A solid-state AM/FM stereo receiver kit from Heathkit’s flagship lineup, introduced in 1974. Find full specifications and production years here.
• AR-1501 (1975) — A modular, expandable audio system from Heathkit designed for DIY enthusiasts and serious audiophiles. With full specifications and production years.
• GR-152-BK — Heathkit GR-152-BK Explorer AM TRF AM radio receiver solder kit, black case. An obscure model with little surviving documentation.
• GR-180 (c. 1966–1968) — Heathkit GR-180: a 19-inch color TV kit, not audio gear, advertised at $379.95 in late 1966 with a 180 sq. in. rectangular tube and built-in dot generator.
• GR-53A (c. 1964–1965) — Heathkit GR-53A, a c. 1964–1965 21-inch color TV kit sold at as little as $399, marketed on its built-in service center and owner-performed adjustments.
• GR-681 — Heathkit GR-681: late-1960s color TV kit advertised by Heathkit with automatic fine tuning and a $499.95 price. Only period ads document this model.

Speakers

• AA-100 (1960–1964) — The Heathkit AA-100 (1960–1964) is a 25-watt-per-channel tube integrated amplifier kit that sold for $84.95 and outperformed commercial amps at twice the price.
• AA-121 (1972) — Heathkit AA-121 (1972) — 40W/ch ULTRA-LINEAR® tube power amp kit. Specs, restoration notes, and current market value.
• AA-40 (1970) — The Heathkit AA-40 (1960–1961) delivers 40 watts per channel of tube-powered clarity, with push-pull EL34s and a cult following.
• AD-22 (1974) — A high-quality passive speaker attenuator and impedance-matching device designed for audiophile and professional use. Covers full specifications.
• AJ-13 (1964) — Heathkit AJ-13 (1964) FM stereo tube tuner kit — $49.95, built-in multiplexer, AFC, transformer supply. A budget classic that still locks stations.
• AJ-15 (1968–1974) — The Heathkit AJ-15 (1968–1974) is a kit-built FM stereo tuner with hard-wired PLL digital tuning, RCA Numitron display, and modular plug-in boards.
• AJ-31 (1965) — The 1962 Heathkit AJ-31 FM Tuner kit delivers tube-powered fidelity, flywheel tuning, and stereo-ready design in a classic DIY package.
• AJ-41 (1962) — Heathkit AJ-41 (1962) tube AM/FM stereo tuner kit, $119.95, built-in multiplex, 2 µV FM sensitivity, lit slide-rule dial.
• AR-1515 (1975–1981) — Heathkit AR-1515 (1975–1981): 70W/ch kit receiver with half-inch LED digital readout, modular build, and a real cult following.
• AR-29 (1975) — Heathkit AR-29 (1970–1976) AM-FM stereo receiver — a forgotten solid-state unit with spotty availability and common power/slider issues.
• AS-103 (1975) — Heathkit AS-103A (1973): A licensed, DIY version of the AR-3A with 12-inch woofer, 3-way design, and classic retro grill cloth.
• AS-105 (1975) — A passive speaker management network designed for custom speaker systems, part of Heathkit's DIY audio legacy. Covers full specifications.
• AS-1348 (1979) — A passive subwoofer crossover and enclosure system designed for DIY audio enthusiasts seeking enhanced bass integration.
• AS-136 (1975) — A compact passive speaker system designed for bookshelf or small-room use, part of Heathkit's DIY audio lineup in the 1970s.
• AS-48 — Heathkit AS-48 speaker kit (1969, $169.95) with JBL 14-inch woofer and 2-inch tweeter. A little-documented model — see what the record shows.

Test Equipment

• IG-18 (1973–?) — Heathkit IG-18 solid-state sine/square generator, 10Hz-100kHz, kit-built from 1973, predecessor to the IG-5218.

Tuners

• 112-FM — Heathkit 112-FM — little documented. No specs, dates, or reviews survived; the FM designation suggests a tuner, but unconfirmed.
• 1214-AM — Heathkit 1214-AM (AR-1214) AM/FM stereo receiver kit, advertised at $169.95 in 1973; claimed 0.5% THD and 40 dB stereo separation.
• 13-FM — Heathkit 13-FM, a little-documented Heathkit audio model from the mid-1960s. Possibly an FM tuner kit; no specs or dates are confirmed in surviving records.
• 14-FM — Heathkit 14-FM audio model: little is documented. No specs, dates, or design details verified; archive listing is the only certain record.
• 15-AM — Heathkit 15-AM is a little-documented Heathkit audio model; no specs, dates, or original price are currently recorded.
• AJ-14 (1965–1969) — Heathkit AJ-14 (1965–1969) all-transistor FM stereo tuner kit. $49.95 in 1965, $54.95 by 1969; 14 transistors, 5 diodes, 5 µV sensitivity.
• AJ-2520 — Heathkit AJ-2520 AM/FM tuner — little documented; known specs from Audio (Mar 1990) include FM 10.8 dBf and AM sensitivity/S/N figures.
• AJ-29 — Heathkit AJ-29 AM/FM/FM-stereo tuner kit, sold as the tuner section of the AR-29 receiver. Advertised at $169.95 in late 1970. Little else documented.
• AJ-43 — Heathkit AJ-43: all-transistor AM-FM stereo tuner kit from 1963, 25 transistors, 2.5 µV sensitivity, automatic stereo, $119.95.

Unknown

• 1500A — Heathkit AR-1500A stereo receiver kit (c. 1974–75), third of the AR-15/AR-1500 lineage. Documented via Heathkit ads: FM selectivity >90 dB, 1.8 µV sensitivity.
• 16 — Heathkit 16, a little-documented 16-watt stereo amplifier kit from the mid-1960s. Only known mention is a 1964 High Fidelity ad listing it at $39.95.
• 43-AM — Little is documented about the Heathkit 43-AM. What the record shows comes from Heathkit’s own September 1963 advertising: the 43-AM was presented as…
• 48 — Heathkit AS-48 bookshelf speaker system (1969), kit form with 14-inch JBL woofer and 2-inch tweeter, $169.95. Documented in period audio magazines.
• KIT-20 — Little is documented about the Heathkit KIT-20; no catalog listing, review, or ad naming the model has surfaced in the Archive's collection.
• KIT-70 — Documentation on the Heathkit KIT-70 is thin. A 1957 Audiocraft review covers the Heathkit 70-Watt Amplifier Kit claimed to reach 10–40,000 cps.
• US-3 — Heathkit US-3 coaxial speaker kit with 12-inch woofer and 3-inch tweeter, crossover at 2,000 Hz, rated for 15 watts. Little-documented model from ca. 1960.

Other Models

• AA 181 — A mono integrated tube amplifier kit with 25 hi-fi-rated watts and four switchable front-panel inputs. Includes detailed specs and production dates.
• AA-11 — Heathkit AA-11 stereo power amplifier kit (1960–1963), 25W per channel push-pull output, designed to pair with a separate Heathkit preamplifier.
• AA-1600 — Heathkit AA-1600 integrated amplifier kit, 150W/ch RMS into 8 ohms, mid-1970s solid-state design with DC-coupled output and relay protection.
• AA-1640-A — Heathkit AA-1640-A: an obscure variant of the 1975 Super-Amp kit. Base model: 200W/ch into 8 ohms, 69 lbs, $439.95. The A suffix itself is undocumented.
• AA-1800 — Heathkit AA-1800 stereo power amplifier, 150wpc. Period press measured low distortion and high headroom; enthusiast reports note subwoofer use.
• AA-20 — Heathkit AA-20 solid-state integrated amplifier kit, c.1968-1970. Compact 24-25 WPC stereo amp with 4 ICs, <0.3% THD, 5Hz-60kHz response. Little documented.
• AA-2004 — Heathkit AA-2004 (1972): a 200W four-channel integrated amp kit with built-in matrix decoder, biamp-ready, $349.95.
• AA-30 — Heathkit AA-30 (1964) — Heathkit's first solid-state stereo amplifier, a 40 W/ch kit-built design with under 0.5% distortion. Little else is documented.
• AC-11 — Heathkit AC-11 FM multiplex converter — a tube stereo decoder that turned mono FM tuners into stereo, with a single Channel Separation knob and surviving schematics.
• AD-110 — Heathkit AD-110 stereo cassette deck kit (c.1971-72), ±3 dB 30 Hz–12 kHz, CrO2 bias, pre-aligned transport, $119.95-$129.95.
• AD-1305 — Heathkit AD-1305 five-band stereo equalizer kit — 5 sliders per channel, 12 dB/octave slopes, 0.05% THD, unity gain, bypass switch. Companion to the AP-1615 preamp.
• AD-1530 — Heathkit AD-1530 Dolby stereo cassette deck kit — factory-aligned transport, CrO2 bias switching, 40 Hz–14 kHz response, built in about five evenings.
• AD-16 — Heathkit AD-16 — kit version of the Magnecord 1020 4-track stereo tape recorder. 3 motors, 21 transistors, $399.50 kit, save $170.
• AD-2002 — Heathkit AD-2002 Stereo-4 decoder kit, $29.95 — the Electro-Voice EVX-4 circuit in build-it-yourself form.
• AD-30 — Heathkit AD-30 — the $22.95 mechanism-only Garrard turntable kit from 1960, sold without cartridge, base, or cables.
• AE-20 — Heathkit AE-20 walnut equipment cabinet — 82 lbs, $99.50, factory-assembled furniture for Heathkit hi-fi components.
• AJ-10 — Heathkit AJ-10 AM-FM stereo tuner kit — the novice-buildable tuner that <em>Tape Recording</em> proved a first-timer could assemble, and a DXer used to pull 450-watt FM stations across state lines.
• AJ-11 — Heathkit AJ-11 AM/FM tuner kit, $69.95 in 1962, dual magic-eye tuning and flywheel dial. Sources conflict on tube vs solid-state.
• AJ-1214 — Heathkit AJ-1214 tuner — little is documented about this model; the record is thin, but it appears related to the AR-1214 receiver covered in 1973 period press.
• AJ-1510A (1975) — Heathkit AJ-1510A (1975) — one of the first digitally synthesized FM stereo tuners, sold as a kit; specs, quirks, and collector notes.
• AJ-1600 (1976–1977) — Heathkit AJ-1600 AM/FM tuner kit (1976–1977), $469.95. PLL multiplex, MOS-FET front end, VFD display. Great sound when aligned, notorious to service.
• AJ-30 — Heathkit AJ-30 hybrid tube/solid-state FM stereo tuner (1969-1972), $199.95 kit, 2.0uV IHF sensitivity, 70dB selectivity, 15W power.
• AJ-32 — Heathkit AJ-32 AM/FM/FM stereo tuner kit — $84.95 in the Heathkit catalog, dual eye tuning indicators, built-in multiplex, 23 lbs. Circuit type disputed.
• AJ-33 — Heathkit AJ-33 all-transistor AM/FM/FM stereo tuner kit, $99.95, 1963–1965. Walnut cabinet, gold-anodized panel, stereo demodulator, AFC.
• AJ-43D — Heathkit AJ-43D AM/FM/FM stereo tuner kit, $109 in 1966. 25 transistors, 9 diodes, factory-aligned front-end. Julian Hirsch praised the AJ-43.
• AN-2016 — Heathkit AN-2016 (1976) Modulus tuner/preamplifier — modular Dolby FM, SQ, CD-4 bays, LED tuning, 0.05% THD, $599.95 kit.
• AP-1615 — Heathkit AP-1615 stereo preamp/control center — 2 mV phono sensitivity, 0.05% THD, sub-sonic filter, walnut case. The kit-built partner to the AA-1640 Superamp.
• AP-1800 — Heathkit AP-1800 stereo preamplifier from the late 1970s, kit form, sister to the AA-1800 amp. Rarely surfaces on the used market today.
• AR-1214 — Heathkit AR-1214 AM/FM stereo receiver kit — 15 W/ch RMS, 2 µV FM sensitivity, PLL stereo, from $169.95. A budget hi-fi classic.
• AR-13 — Heathkit AR-13 (1963) — the first all-transistor stereo receiver in kit form. 40W, AM/FM/FM stereo, $195. History, specs, and service notes.
• AR-13A — Heathkit AR-13A all-transistor stereo receiver — 46 transistors, 40W RMS, $184 kit, praised by Hirsch as one of the finest integrated receivers of its day.
• AR-15 (1968) — Heathkit AR-15 (1968): 75W/ch FM-only stereo receiver kit, 1,890 parts, FET front end, crystal filter IF. Heathkit's most ambitious kit.
• AR-4 — Heathkit AR-4 acoustic suspension speaker, 2-way with 10-inch woofer and 3-inch tweeter, 60W program power, 55-20kHz response. Little else is documented.
• AS-102 — Heathkit AS-102 (1968) — a three-way bass reflex speaker system with 12-inch woofer, 8-inch midrange, and 3-inch tweeter.
• AS-16 — Heathkit AS-16 — no verified specs, years, or price recovered; the archive declines to publish unconfirmed data and awaits a genuine manual or catalog page.
• AS-18 — Heathkit AS-18 miniature acoustic-suspension speaker kit — 6-inch EV woofer, 2-inch tweeter, 60 Hz–20 kHz, 25W, walnut cabinet. A small kit speaker built to be voiced.
• AS-2 — Heathkit AS-2 (1959) — a compact two-way passive speaker offered unfinished or in mahogany/birch cabinets at $69.95–$79.95. Little else is documented.
• AS-2A — Heathkit AS-2A 2-way acoustic suspension bookshelf speaker kit — 8-inch woofer, 2-inch cone tweeter, 2,500 Hz crossover, 55 Hz–20 kHz, 8-ohm, walnut veneer.
• as101 — A 1960s kit speaker system housing Altec Valencia 846-A components, known for high sensitivity and horn-loaded efficiency.
• BC-1A — Heathkit BC-1A broadband AM tuner kit, $25.95 with cabinet. Prealigned, special detector, edge-lit slide rule dial. The budget builder's AM hi-fi source.
• Daytona — Heathkit Daytona CB-12 23-channel AM CB radio transceiver kit from 1969-1970. Solid-state mobile unit with dual-conversion receiver, 12VDC power.
• EA-2 — Heathkit EA-2 mono integrated tube amplifier, EL84 push-pull output with 5Y3 rectifier. 15W per channel in stereo, 25W mono.
• EA-3 — Heathkit EA-3 (1960) — entry-level stereo tube preamp powered by companion AA-15/AA-21 amplifiers via Jones plug. 14W system, $29.95 kit.
• Eico — Heathkit Eico — identity uncertain; likely a mix-up between two separate kit manufacturers. Period 1959 HiFI-Stereo review data on Eico HF-851 and Heathkit SP-23 preamps included.
• FM-3A — Heathkit FM-3A: the $25.95 prealigned FM tuner kit that made hi-fi FM building accessible in the mid-1950s.
• FM-4 — Heathkit FM-4 (1955-1956): a simple two-tube FM tuner kit, superheterodyne circuit with 12AU6 tubes, sold for $49.95. Little else is documented.
• GD-29 — Heathkit GD-29 (1971) — the build-it-yourself microwave oven kit, $399.95, 650W Litton magnetron, 2450 MHz. Heath's strangest product and a genuine collectible.
• IG-112 — Heathkit IG-112 FM-stereo generator kit — a $100 answer to $500 lab gear, with 100 mHz FM, 75 kHz deviation, and crystal markers.
• IG-5218 — Heathkit IG-5218 sine-square audio generator: 1 Hz–100 kHz sine, 5 Hz–100 kHz square, &lt;0.1% distortion. Specs from the original manual.
• IM-102 — Heathkit IM-102 cold-cathode digital multimeter kit — 3.5-digit, dual-slope, 200 mV–1000 V DC, first hobbyist DMM kit.
• IM-11 — Heathkit IM-11 VTVM — 11-megohm input, 1.5V bottom range, 200µA meter. The world's most popular VTVM in kit ($24.95) or assembled ($39.95).
• IM-13 — Heathkit IM-13 VTVM — 6-inch 200µA meter, gimbal bracket, 1.5/5V AC scales, $32.95 kit / $49.95 assembled. The shop-bench VTVM that shared IM-11 specs.
• IM-17 — Heathkit IM-17 FET VOM kit — 11-megohm input, four DC/AC ranges to 1000V, sold as a $21.95 build-it-yourself meter for hams and servicemen.
• IM-18 — Heathkit IM-18 VTVM (1968–1976): the $9.95 kit meter with 11-megohm input, 200 µA movement, and seven ranges that taught a generation to measure.
• IM-21 — Heathkit IM-21 laboratory AC VTVM — 10 megohm input, ±1 dB to 500 kc, VU-damped meter, $33.95 kit. The budget bench standard of the early 1960s.
• IM-25 — Heathkit IM-25 solid-state VOM (1967–70s): 6-inch color-coded meter, AC/battery power, $80 kit. Specs and manual details for this Heathkit bench meter.
• IM-30 — Heathkit IM-30 transistor tester (1962–63): a kit-built DC analyzer reading beta and alpha directly, 15 µa leakage range, up to 15 amps.
• IM-4100 (1975) — Heathkit IM-4100 frequency counter (1975): 5 Hz–30 MHz, 10 MHz crystal time base, AC or 12V DC, sold as a build-it-yourself kit.
• IP-17 (1968–1977) — Heathkit IP-17 (1968–1977) regulated tube bench supply — 0–400 VDC @ 100 mA, dual meters, $59.95 kit. The workhorse that powered a generation of tube projects.
• PT-1 — A vacuum tube AM-FM tuner built from a kit, featuring separate AM and FM circuit boards and a multiplex output for stereo decoding
• SA-2 — The Heathkit SA-2 is a compact integrated stereo amplifier kit introduced in 1959. It was advertised as a complete dual-channel amplifier/preamplifier…
• SW-717 — Heathkit SW-717 four-band solid-state shortwave receiver, 550 kHz–30 MHz, BFO and bandspread, 7 lbs. A kit-built window on the shortwave bands.
• TR-1A — Heathkit TR-1A half-track mono tape recorder kit — sub-0.35% wow and flutter, 7½/3½ IPS, NARTB equalization, from $99.95 in 1959.
• UA-1 — Heathkit UA-1 mono tube amplifier kit, 12W push-pull 6BQ5, sold 1958-1962 for $29.95; used in pairs for stereo. Find production dates here.
• W-5M — Heathkit W-5M (ca. 1958) — little-documented 25-watt high-fidelity amplifier kit, advertised at $59.75 alongside the 70-watt W-6M.
• W-6M — Heathkit W-6M 70-watt high fidelity amplifier kit, $109.95 in 1958. An obscure model known mainly from Heathkit's own advertising.
• W3-AM — Heathkit W3-AM: a dual-chassis 20-watt Williamson amplifier kit from Heath's late-1950s line, built for custom installations.
• W4-AM — Heathkit W4-AM: a 20-watt single-chassis Williamson amplifier kit, $39.75 in 1958. The affordable entry into Heath's tube amp lineup.
• W5-M — Heathkit W5-M — 25-watt hi-fi amplifier kit advertised at $59.75 from 1958–1959. Little else is documented; the ad record is the record.
• WA-P2 (c. 1956) — Heathkit WA-P2 mono tube preamp kit, c. 1956 — the master control for Heathkit Williamson amplifiers, sold as the matching partner to the FM tuner kit.