Heath's HW-101 came out in 1970, and it sold so widely that Wikipedia says you can still find the "Hot Water One-Oh-One" in use and at hamfests decades later. It's an 80 to 10 m SSB and CW transceiver with a pair of 6146 tubes in the final, good for 100 W on most bands and 80 W on 10 m. It has no power supply inside. It runs from the HP-23 family on AC or the HP-13 on 12 V DC, through an 11-pin plug. Rigpix has it on sale until 1983. Every one was a kit, so you're buying the builder as much as the radio. Heath's manuals were famously clear, but neat work still varies. Collectors look for the SBA-301-2 CW filter, the matching supply and a tidy chassis underneath.
HW-101HW-101 with SBA-301-2 CW filterHW-101 with HP-23 series supply
80, 40, 20, 15 and 10 m (10 m in four 500 kHz segments)
Modes
USB, LSB, CW
Power out
100 W on 80 to 15 m, 80 W on 10 m (180 W PEP input SSB)
Receiver
Under 0.3 µV for 10 dB S+N/N; 2.1 kHz SSB crystal filter
Finals
Two 6146 tubes (6146A interchangeable)
Power supply
External: HP-23 series (AC) or HP-13 (12 V DC)
Weight
17.5 lb
Also listed as
HW101, HW 101, Heath HW-101, Hot Water 101
Typical eBay ask (Oct 15, 2026)
$210–$525
Bench check
Power, receive, finals and supply
Transmit power
Heath rates it at 100 W out on 80 through 15 m and 80 W on 10 m into a 50 ohm load. Ask for a wattmeter reading into a dummy load on 80, 20 and 10 m in CW or tune. A set that only lights up and hisses hasn't shown you its transmitter.
Receiver
Heath specs it at under 0.3 µV for 10 dB signal-plus-noise to noise on SSB, with 2.1 kHz selectivity from the 3.395 MHz crystal filter. Ask whether it hears signals on every band, including all four 10 m segments. On a tube set, weak receive everywhere means checking tubes and alignment first.
Finals
Two 6146 beam power tubes in the final, and Heath's manual says 6146 and 6146A swap directly. Bias is set with the transceiver's own BIAS control, since the HP-23's bias control is out of circuit with Heath's cable wiring. Ask for a photo showing both finals in place with their anode clips on.
Power supply
There's no supply inside. It runs from Heath's HP-23 series AC supply (HP-23A, B, C or PS-23, set for 300 V low B+) or the HP-13 for 12 V DC, through an 8-wire cable and 11-pin plug. The HP-23 makes about 700 V at 250 mA plus 300 V, bias and heater voltage from 120 V AC, so a listing without it is only half a station.
Dial and display
Tuning is an analog dial with 5 kHz divisions, driven by an FET VFO, with a 100 kHz crystal calibrator to check it. Heath specs drift under 100 Hz an hour after a 45-minute warm-up. Ask for a photo of the dial lit and whether it lands on the calibrator marks.
Filters and options
The 2.1 kHz SSB filter is standard, and Heath's SBA-301-2 400 Hz CW filter was an option, picked with a front-panel filter switch. Ask for a photo inside to see whether the CW filter is fitted. WB8JKR found carrier crystals so far off on one HW-101 that CW output fell to 50 W through the CW filter, so check CW power with it selected.
Should come with it
An HP-23 series AC supply (or HP-13 for 12 V DC) with its 8-wire cable and 11-pin plug
A high-impedance PTT microphone on the 2-pin Amphenol 80MC2M plug; Heath used its HDP-21A for the spec tests
Heath's SBA-301-2 CW filter, if fitted
The Heath assembly and operating manual
Check the listing photos against this list, and ask the seller about anything you can’t see. A missing piece should come off the price.
What to check
Every HW-101 was built by its first owner, and Heath told 73 Magazine in 1967 that 90% of kit trouble traced to poor soldering, so look hard at the joints. WB8JKR documents the first CW dot getting lost above about 20 wpm, sidetone leaking into receive, and an S-meter zero that wanders as resistor R106 heats up.
01Power out: Ask for a video of a wattmeter into a dummy load on 80, 20 and 10 m. About 100 W on 80 to 15 m and 80 W on 10 m is the factory figure.
02Every band: Ask the seller to tune in signals on 80, 40, 20, 15 and each 10 m segment. Every band should hear stations or at least band noise.
03Final tubes: Ask for a photo of the two 6146-family finals in their cage. Both should be the same type with anode clips on.
04Dial and calibrator: Ask for a photo of the dial lit and whether it lines up with the 100 kHz calibrator. A dial that lands on the marks shows the VFO is healthy.
05CW filter: Ask for a photo inside to see if the SBA-301-2 CW filter is fitted. CW power with that filter selected should be close to the SSB-filter reading.
06Power supply: Check the listing includes an HP-23 series or HP-13 supply with its 11-pin cable. Without one, the radio can't be tested or used.
07Build quality: Ask for close photos under the chassis. Shiny, even solder joints and no scorched parts or loose added wires suggest a careful builder.
08Mic and manual: Look for a high-impedance PTT mic on the 2-pin plug and the Heath manual. The manual's alignment steps matter on a kit.
09Model number: Check the panel reads HW-101. The SB-100, SB-101 and SB-102 are close Heath relatives.
We'd buy ticntoc1's HW-101, titled tested and working with its manuals, at $300 delivered, under the $348 median. It has no supply, and an HW-101 needs Heath's HP-23 series (or the HP-13 on 12 V DC) to run, so budget for one or compare the two stations, myepicshop's with an HP-23B and an HM-102 SWR meter at $541 and wink052012's one-owner set with an HP-23A and a Shure mic at $640, $215 of it shipping. There are at least 7 for sale, and the untested radios alone run $155 to $188 delivered. Every one was a kit, so ask for photos underneath to judge the soldering, a wattmeter reading into a dummy load on 80, 20 and 10 m, and whether it hears signals on every band.
Listed now
7
For parts
0
Typical ask
$210–$525
Full range
$105–$425
★Cheapest
$300.00est. delivered
The cheapest HW-101 titled tested and working, at $300 delivered with its manuals. There's no supply, so budget for an HP-23 series supply with its 11-pin cable, and ask for a wattmeter reading on 80, 20 and 10 m.
HEATHKIT HW-101 SSB/CW Ham Radio Transceiver. With manuals Tested, works
About $48 under the $348 median from a 100% seller, with the only test claim on the page. Ask for photos underneath, since every HW-101 was a kit and the soldering is the first owner's.
HEATHKIT HW-101 SSB/CW Ham Radio Transceiver. With manuals Tested, works
Titled untested at $155 delivered, about $190 under the median, with a Drake low pass filter. There's no supply, so you'll need an HP-23 just to power it up.
Vintage Heathkit HW-101 Ham Radio SSB Transceiver W/ Drake Low Pass Filter Untes
Delivered prices include shipping as eBay quoted it to a US address on Oct 15, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
For sale on eBay
7 of 7 listed
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 15, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used
★Cheapest
★Best value
HEATHKIT HW-101 SSB/CW Ham Radio Transceiver. With manuals Tested, works
$300.00est. delivered
$255.00 + $45.00 shipping
Buy It Now$255.00
Offers accepted+
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