MORNING STAR OBSERVATORY
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MX-949A/U Tube Socket Adapter Kit for the I-177

This is a "breakout' box that adds additional tube sockets to the I-177 tester. These can be a bit hard to find, but I stumbled across this one online and bought it before it could get away. It's dated 1953, the same year as my I-177, and is in good condition except for the ceramic tube socket.

Picture
The original paint only has a few minor dings and chips, not enough to justify repainting it. All it really needed was a good cleaning.

It makes the I-177 more versatile, although there are still some newer tubes that can't or shouldn't be tested on the combo because of the 5-volt grid signal of the I-177.

Picture

​There's no electronics inside this unit, just wiring from the tube sockets and octal adapter cable that go to the numbered pins and jacks of the front panel.

Picture
Picture
The ceramic tube socket was cracked, which seems to be a common malady with these units, probably from over-tightening the mounting screws. I epoxied it back together and filled the cracks with a porcelain filler for appliances. 

Page created 9/1/2017
Last updated 4/12/2021
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  • Home
    • Contact
  • Astrophotography
  • Observatory
    • New Observatory
    • Lancaster Dome
    • ExploraDome
  • Equipment
    • Accessories >
      • RA Drive Corrector
    • 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
    • C11 XLT Mods
    • Dome Automation
    • Orion SSPRO Camera >
      • Disassembled Views
      • Noise Reduction Mod
      • Temp Controller Mod
    • Ultima 8 Mods
    • Zhumell Refractor Mods
  • Non-Astronomy
    • Amateur Radio >
      • Accessories >
        • Station Boom Microphone
      • Ameco >
        • Ameco AC-1
        • Ameco OCM
        • Ameco PT-2
        • Ameco R5A
      • Vintage Equipment >
        • Knight Kit T-60 Transmitter
        • Heathkit SB-102 Station
      • Yaesu FT-817 >
        • Yaesu FT-817ND
        • LDG Z-817 Autotuner
        • Windcamp LiPo Battery
    • Antique Radios >
      • Building A Radio Workbench
      • Radio Dial Neon Clock
      • Radios >
        • Boat Anchor Radios >
          • BC-348N Receiver
          • Collins 51J4 HF Receiver
          • R-392 HF Receiver
        • 1938 Zenith 6-S-254
        • Echophone EC-1
        • Eltz Radione 2
        • Knight Kit Span Master II
        • Panasonic RF-5000A
        • Silvertone Model 4465
      • Test Equipment >
        • Hickok >
          • Hickok OZ-1 (550X)
          • Hickok 19X RF Generator
          • Hickok 225K VTVM
          • Hickok 288X RF Generator
        • Simpson >
          • Simpson Genescope
        • Supreme Instruments >
          • Supreme Model 385 Automatic
          • Supreme Audolyzer
          • Supreme Vedolyzer
          • Supreme 563 Audio Generator
        • 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
        • Rider Chanalyst
        • Tektronix 326 O'scope
        • Tube Testers >
          • Alternating Current Sink
          • Drug Store Tester
          • Hickok OZ-1 (550X)
          • I-177 Tube Tester
          • MX-949 Adapter
          • Precision Model 10-12
          • Supreme Model 385
          • TV-3C/U Tube Tester
    • Star Trek Communicator