MORNING STAR OBSERVATORY
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        • - Restoring a Gray 562 Audolyzer
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Supreme Model 385 Automatic

The Model 385 Automatic was introduced in 1936 and is the combination of Supreme's Model 89 Tube Tester and Model 339 Deluxe Radio Analyzer. It is a Free Reference Point, or Freepoint, Tester which allows checking tubes and testing circuits under actual operating conditions. A tube can be removed from its socket in the radio and replaced by a plugin cable from the analyzer. The tube is replugged into a socket on the analyzer for in-circuit testing and every tube pin is now easily accessible at jacks on the analyzer for making measurements while the radio is operating. This type of testing works best with the older tubes.

​I acquired this tester 30 plus years ago. It was restored at that time but it could now do with another update.
Picture
Originally this tester was missing its top lid, but I had one custom made to fit. I couldn't get it made in oak, but the difference is not very noticeable. I also recreated the tube chart in the lid.

Picture
That's a lot of pin jacks. The front panel is very busy with controls, sockets and jacks, in addition to the two fan meters and giant neon bulb.

Picture
I recreated the tube chart from scratch using images I found of other testers and then had it laminated. That was a long time ago and I guess now days you can just download a copy online.

Picture
​This is the Volt-Ohm-mA meter on the left side of the tester.
Picture
And this is the English reading tube tester and capacitance checker meter on the right side of the tester.

Page created 6/8/2020
Last edited 6/8/2020
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  • Home
    • About
    • Contact
  • Astrophotography
  • Observatories
    • About the ExploraDome
    • About the Lancaster Dome
    • New Observatory
  • Equipment
    • CCD Cameras >
      • Orion Starshoot Pro
    • Mounts >
      • Orion HDX110 (EQ-8)
    • Telescopes >
      • 1956 Questar 3.5
      • Astro-Tech AT6RC
      • Celestron C-11 XLT
      • Zhumell 152mm Refractor
  • Projects
    • Orion SSPRO Camera >
      • Disassembled Views
      • Noise Reduction Mod
      • Temp Controller Mod
    • Zhumell Refractor Mods
  • Non-Astronomy
    • Amateur Radio >
      • Boat Anchor Radios >
        • BC-348N Receiver
        • Collins 51J4 HF Receiver
        • R-392 HF Receiver
      • DIY >
        • Station Boom Microphone
      • Ameco >
        • Ameco AC-1
        • Ameco OCM
        • Ameco PT-2
        • Ameco R5A
      • Heathkit >
        • Heathkit SB-102 Station
      • Knight-Kit >
        • Knight Kit Span Master II
        • Knight Kit T-60 Transmitter
      • Yaesu FT-817 >
        • Yaesu FT-817ND
        • LDG Z-817 Autotuner
        • Windcamp LiPo Battery
    • Antique Radios >
      • Building A Radio Workbench
      • Radio Dial Neon Clock
      • Radios >
        • 1938 Zenith 6-S-254
        • Echophone EC-1
        • Eltz Radione 2
        • Panasonic RF-5000A
        • Silvertone Model 4465
    • Geiger Counters >
      • AN/PDR-27G Radiac Set
      • Lionel CD V-700 Geiger Counter
      • RCA WF-12A Geiger Counter
    • Test Equipment >
      • DIY Test Equipment >
        • DIY Curve Tracer
        • DIY Signature Tracer
      • Military Test Equipment >
        • BC-221-AF Frequency Meter
        • I-177 Tube Tester
        • LM-21 Frequency Meter
        • MX-949 Adapter
        • TS-323/UR Frequency Meter
        • TS-465 C/U Sweep Generator
        • TS-505D/U VTVM
        • TV-3C/U Tube Tester
      • Tube Testers >
        • Alternating Current Sink
        • Drug Store Tester
        • EMC Model 200 Tube Tester
        • Hickok Model 6000A Tube Tester
        • Hickok OZ-1 (550X)
        • I-177 Tube Tester
        • MX-949 Adapter
        • Precise Model 111 Tube Tester
        • Precision Model 10-12
        • Supreme Model 385
        • TV-3C/U Tube Tester
      • VTVMs and Multimeters >
        • B&K Model 290 Hi-Low FET Multimeter
        • Hickok 225K VTVM
        • McMurdo Silver VOMAX 900
        • Micronta 22-220 FET Multimeter
        • Simpson 360-2 Digital FET DMM
        • TS-505D/U VTVM
      • Hickok >
        • Hickok 19X RF Generator
        • Hickok 225K VTVM
        • Hickok 288X RF Generator
        • Hickok OZ-1 (550X)
        • Hickok 6000A Tube Tester
      • Simpson >
        • Simpson 360 DMM
        • Simpson 360-2 DMM
        • Simpson 480 Genescope
      • Supreme Instruments >
        • Supreme 385 Automatic
        • Supreme 560A Vedolyzer
        • Supreme Model 561 AF/RF Generator
        • Supreme Model 562 Audolyzer
        • - Restoring a Gray 562 Audolyzer
        • - Restoring a Black 562 Audolyzer
        • Supreme Model 576 RF Generator
      • Rider 162 Chanalyst
      • Tektronix 326 O'scope
    • ---------------
    • Geology >
      • Fossils
      • Rocks and Minerals
    • Star Trek >
      • Star Trek Rock Mood Lamp
      • Star Trek Communicator