Scot Silverstein, MD
Amateur Radio station KU3E

My Amateur Radio station at its peak in the 1990's, including a Kenwood TS-930S transceiver, Heathkit "Hot Water" HW-101 vacuum tube transceiver, Heathkit HW-7 QRP (low power) mini-rig, a well-shielded, classic 8-bit Z80 computer for radioteletype work, and various accessories.  In the yard:  a 110-foot-long G5RV-style dipole up at 50 feet for the longer wavelengths from 160-30 meters; and a 2-element rotatable beam antenna for the shorter ones from 20 to 6 meters.

This physician diagnosing and treating ailments in an electronic patient, the classic, American-made Ten Tec Corsair II transceiver.

A shortwave kit I built in the early 1970’s, three-transistor regenerative receiver.  Still works great.


A somewhat more sophisticated kit.  My Heathkit HW-101 ham radio transceiver, produced from 1970 to 1983 in kit form. 20 vacuum tubes including a pair of the classic, rugged 6146 beam power transmitter tubes capable of over one hundred watts output power. Of course, 800 volts DC on the 6146 plates made troubleshooting not for the unsteady of hand! I built my "Hot Water 101" -- as this model was affectionately known -- decades ago.  My first contact on this radio when it went “live” was on 15 meter CW (code) with a Ham radio operator in France.




A collage of pictures of my HW-101 going together and being tested.





Close up, HW-101 circuit boards undergoing construction before being mounted to chassis.






HW-101 innards, top view.





HW-101, rear panel.  Connection for power, antenna, Morse Code key, speaker, ALC for use with a linear amplifier, and ground.






HW-101 underside of chassis.  Each and every one of those solder connections was done by me.





WARNING:  DANGEROUS VOLTAGES.  A warning to be taken seriously.  Up to 800 volts DC present here.


The business end of the HW-101's transmitter. Whatever you do, don't touch those 6146 anode caps …

The shortwave receiver that started my interest in radio in the early 1960's, the Hallicrafters S38E.

The classic late 60's-early 70's shortwave receiver that helped me (and many others) get started in Amateur Radio, the Realistic DX-150A. One of the first solid-state consumer general-coverage receivers available, the DX-150 series was introduced in 1967.

The Trio-Kenwood TS-930S HF transceiver. Solid-state, microprocessor-controlled, 100+ watts power output from 3-30 MHz. Ham radio operators find computers somewhat boring compared to equipment like this, produced ca. 1983 (at the same time as the original IBM PC/XT) and, unlike short-lived computer junk, still an excellent performer.

My newest radio transceiver, the American-made Ten Tec Jupiter.

  • 34 IF-DSP receive filters. 25 choices from 1050-8000 Hz for voice modes and 9 more from 300 to 900 Hz for digital and CW mode.
  • 18 different DSP-generated transmit bandwidths from 900-3900 Hz.
  • Software-controlled, stored in updateable Flash ROM.
  • Spectrum Sweep gives a snapshot of the entire band at a glance.




Not a radio, but an infrared-sensing heart monitor I built in 1980 during a clerkship in biomedical engineering, Boston University Hospital, 1980.




Inside the heart monitor.  I etched and drilled the printed circuit boards myself.





Not in focus, but I also etched “SMS 80” into the copper PC board.





My Heathkit H8 computer, introduced 1977.  Intel 8080 processor. One of the first personal computers.  In true minicomputer style, the 8080 general registers, accumulator/flags register, program counter, stack pointer, and memory addresses were directly accessible via the front panel pushbuttons and the split-octal display.





Inside the H8.  I used this to teach computer and CPU architecture to Medical Informatics  postdoctoral fellows at Yale School of Medicine.  I do not believe IT personnel should be mere “appliance operators.” 


Seeing all this, it may be easier to imagine why, as a CMIO several years later I was offended when patronized by hospital IT personnel about how an information system  in an invasive cardiology cath lab, a critical care area, could not be moved from unstable Windows 3.1 to Windows NT to prevent frequent crashes and data loss because “Windows NT needed RAID disk arrays” and other bullsh*t.  See





My TRS-80 Model I running VTOS 4.0, a pre-IBM PC precursor to LDOS and TRSDOS 6.  All were far superior to MS-DOS.




TRS-80 Model I about to undergo repair.