Disposition of radios (2) – Collins S-Line Station

Collins S-Line (32/75/312-4…) Station Loaded for Service Work

Over the last 12 years I’d accumulated enough Collins S-Line equipment to not only complete the 32s/75s station started when George W9EVT gave me a 75S1 receiver with a shopping list of what I needed to complete an operating S-Line station, but a second KWM-2A transceiver based station which I will come back to in another post.

The 32S/75S setup was never fully setup once collected and consists of:

  • 32S1 – transmitter
  • 75S1 – receiver
  • 30L1 – amplifier
  • 312B4 – remote VFO
  • 516F2 – power supply
  • 312B3 – speaker
  • DL-1 – dummy load
  • Matching SWR Meter
  • SM-1 – microphone
  • SM-2 – microphone
  • Voice processor
  • Digital frequency Display
  • necessary interconnect cables, manuals, some spare tubes, and so on

At no one time has the entire station been in operation.

I reached out via the reflector to fellow members of the Collins Collectors Association asking for help checking over the gear, and more importantly helping me with some issues with the other S-Line station (the one that I will come back to in a later post).

Chuck W9KR reached out to me, as we are just over an hour apart, offing to help me out.

So the station made it way to Chuck’s QTH for review, tune-up and any catch-up work/mods.

We opened up the 30L1 amp to test the tubes, as replacing these tubes has become rather pricy. W9KR has awesomely kept tube testers that outshine a typical museum piece which were put to duty testing the four tubes.

All of the power tubes tested great, and digging a bit further we discovered this particular 30L1 had already had a power supply upgrade board and kit installed.

We spent some time with my describing how I wanted to end up with a robust station that I and others who didn’t have much of a chance to operate tube radios could work with learning these skills.

The station was left with Chuck W9KR to be systematically gone through. Planes are to bring in the KWM-2A station from Washington Island so Chuck can help me sort that station out as well.

73

Steve
K9ZW

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