Kenwood TS-180S (1979–1980s)

A hundred-watt, all-solid-state HF transceiver with no built-in power supply. The receiver front end is very quiet.

Overview

The TS-180S is what Kenwood was building in 1979. It has no built-in mains supply and no bank of memory buttons. What it has is a clean receiver, honest output power, and a front panel you can learn by feel in a dark shack. The Japanese-built rig covers the ham bands from 160 through 10 meters - 1.8-2.0, 3.5-4.0, 7.0-7.3, 14.0-14.35, 21.0-21.45, and 28.0-29.7 MHz - plus two 500 kHz AUX bands that owners could populate later if the World Administrative Radio Conference opened new territory. It also receives WWV at 10 MHz, which comes in handy when you're trying to confirm propagation at 3 a.m.

It is not a general-coverage receiver. Universal Radio is blunt about it: the TS-180S tunes the ham bands and little else. If you wanted shortwave broadcasters or utilities, you needed a separate receiver. That was a deliberate choice. It kept the front end narrow and the price within reach of a working amateur.

The tuning is analog and continuous, with no keypad entry and no scanning. The readout is a 100 Hz digital display with an analog subdial backing it up. That combination was common in the late '70s, and it aged better than pure digital readouts of the same era, because the analog dial still works when the counter chip gets flaky. Modes are SSB, CW, and FSK. There is no FM and no repeater shift. This is a rig for working DX and ragchewing on sideband, not for the VHF crowd.

Price in 1981 in the UK was £679.60, and eHam.net lists a US MSRP of $1250.80, currency year unspecified. Either way, it was a substantial investment aimed at the dedicated radio amateur. Many survive today in working condition.

Key Features

Single-Conversion Superheterodyne with an 8.830 MHz IF

Kenwood chose a single-conversion design with an intermediate frequency of 8.830 MHz for the TS-180S. Single conversion was already old-fashioned by 1979, since double and triple conversion designs were becoming standard in higher-end gear. But a well-executed single-conversion receiver can be quieter and simpler than a mediocre multi-conversion one. The QST review from May 1980 noted that the design helped "greatly reduce the wide-band noise in the receiver while improving the skirt selectivity". That matters more on a crowded 40-meter band at night than any spec sheet number. Image rejection is rated at 60 dB, and sensitivity is 0.25 µV for 10 dB signal-plus-noise-to-noise. Those are respectable figures for the era.

100 Watts on SSB, CW, and FSK

Output is 100 watts on SSB (PEP), CW, and FSK, with slightly less on 10 meters. That is enough to work the world with a decent antenna. The PA transistors are the interesting part. QST (May 1980) identified them as SRFI714s, each rated at 250 watts and made specifically for Kenwood. A pair of 250-watt devices running at 100 watts output are loafing, which is one reason these rigs have a reputation for surviving decades of use. Spurious emissions are rated better than -50 dB, and carrier suppression is better than 40 dB down.

Dual RIT, IF Shift, and a Noise Blanker

The TS-180S ships with a noise blanker, dual RIT (receive incremental tuning), IF shift, VOX, and transverter terminals. Dual RIT is the standout. It lets you tune the receive frequency independently on two different offsets, which is useful when working a split pileup or chasing a DX station who's listening up 5. IF shift lets you slide the passband to dodge adjacent interference without retuning. These aren't exotic features by modern standards, but in 1979 they were the difference between a rig you fought and a rig you worked with.

Four Tunable Channels with the DFC-180

Out of the box, the TS-180S has no memory channels. Add the optional DFC-180 digital frequency control unit and you get four tunable channels, enough for a few net frequencies or a couple of band edges. It's a modest amount of memory, and it was optional. Plenty of owners ran the rig without it.

Analog Tuning with a 100 Hz Digital Readout

The tuning knob is continuous and analog, backed by a 100 Hz digital display and an analog subdial. You can spin the dial freely without waiting for a synthesizer to catch up, and the digital readout gives enough resolution to land precisely on frequency. Frequency stability is rated within ±1 kHz during the first hour after power-on and within 100 Hz per 30-minute period after that. That is good enough for SSB and CW work, though not crystal-locked.

Compact, Rack-Friendly Chassis

The rig measures 325 × 133 × 287 mm (about 12.5 × 5.4 × 11.2 inches) and weighs 11.5 kg (25.4 lb). It runs on 11-16 VDC via a 6-pin Molex connector, drawing 1.2-1.6 A on receive and up to 20 A on transmit. Universal Radio notes the requirement as 13.8 VDC at 20 amps. There's no internal power supply. You need the companion PS-30 or an equivalent, and QST's May 1980 review showed the rig alongside its matching supply. The antenna connector is a standard SO-239 at 50 ohms. Audio output is 2 watts into 4 ohms at 10% distortion, with a 3.5 mm external speaker jack rated for 4-16 ohms.

Historical Context

The TS-180S was manufactured in Japan starting in 1979 and stayed in production into the early 1980s before being discontinued. The QST review in May 1980 confirms it was on the market by then and being taken seriously by the amateur press. One eBay listing claims a 1988 manufacture year, but that conflicts directly with the 1980 review date and should be treated as unreliable. The rig was long out of production by then.

The new price in the UK in 1981 was £679.60, and eHam.net lists a US MSRP of $1250.80. The rig was positioned as a serious HF transceiver for the dedicated operator, not an entry-level starter. Kenwood offered a full set of accessories: the AT-180 antenna tuner with SWR/power meter, the DFC-180 digital frequency control, the VFO-180 remote VFO, the SP-180 external speaker with filters, the YK-88C 500 Hz CW filter and YK-88S 2.2 kHz SSB filter, microphones (MC-35S hand mic, MC-50 desk mic), headphones (HS-4, HS-5), the PC-1 phone patch, the SM-220 station monitor, and the PS-30 power supply. Owners also paired it with the TL922A amplifier. One eHam reviewer recalled buying the TS-180S when it was introduced along with all the optional accessories, including that amp.