Ham Radio Parts?

Discussion in 'Electronics' started by CharClothed, Nov 8, 2017.

  1. CharClothed

    CharClothed Supporter Supporter

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    So as mentioned yesterday, I picked these up at a thrift store for $6, the bottom two I know what they are. The top small one, I have no info on. The bottom one is in rough shape on the inside, I'll post pictures in a moment here. But I'd like to get it working. Anyone know where you can get parts for these to make them work? Here's the info I have for the bottom two.
    http://rigreference.com/en/rig/5589-WRL_Globe_Chief_90_A
    https://antiqueradio.org/halli10.htm
     

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  2. CharClothed

    CharClothed Supporter Supporter

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    I was able to open up the top and bottom ones. The middle one I wasn't able to get inside of. The bottom is the worst of them.
     

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  3. atlastrekker

    atlastrekker Overlanding Bushwhacker Supporter Bushclass I Bushclass II

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    Top one is a power supply.

    Bottom picture is a transmitter, it looks like the sockets for the tubes are there, but no tubes! They probably took them out to use in something else. That probably means there are issues elsewhere with the transmitter. That would be my guess.

    Cool find either way. I don't know too much about old radio gear, but I do know ebay is one of the few places that has tubes anymore. Some folks really like the old guys, but they can be fickle. @DKR is pretty good at this stuff, so let's see what he thinks!
     
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  4. atlastrekker

    atlastrekker Overlanding Bushwhacker Supporter Bushclass I Bushclass II

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  5. tabasco_joe

    tabasco_joe Supporter Supporter Bushcraft Friend

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    Top one is a variac. Which is a variable AC transformer.
    Bottom one is Halicrafter receiver.
    Proceed slowly. Most of the capacitors are likely bad and could well short out when powered. The transformers may also be bad.
    These products use high voltages in circuits and can be dangerous to turn on without appropriate pre testing.
    Rehabilitating them takes considerable work.

    This appears to be the manual with schematic for the Halicrafter: http://noobowsystems.org/restorations/s-20r/s-20r-manual-remastered.pdf
     
    Last edited: Nov 8, 2017
  6. tabasco_joe

    tabasco_joe Supporter Supporter Bushcraft Friend

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    The down side of old tube equipment is that many components had short life spans due to early construction technologies and heat related aging.
    The plus side is that if you can restore and find the tubes it's far easier to align than a transistor receiver.

    I bet CJ knows how to do this. Brings back my early days in school.
     
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  7. atlastrekker

    atlastrekker Overlanding Bushwhacker Supporter Bushclass I Bushclass II

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    Is it a variable step down transformer?
     
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  8. Lichen

    Lichen Supporter Supporter

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    I love old radios! I think the name of the place is Antique Radio Parts. I've bought a lot of tubes and capacitors from them. You'll also need to pick up a soldering iron. Good luck.
     
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  9. tabasco_joe

    tabasco_joe Supporter Supporter Bushcraft Friend

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    Yes. That's most common. There are some that can step up at the full range so you can adjust from something like 110% and down.
     
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  10. Seacapt.

    Seacapt. Supporter Supporter

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    Google restoration/repair of Globe Chief transmitter and restoration of Hallicrafters S-38 to see what you will be getting into. The S-38 is a much smaller Hallicrafters SW recvr. but you'll get a basic idea and schematics for your SR-120 are also available. Both these rigs can be re capped, new resistors ect. with easily available parts today. Be careful with the Variac it's homebrew (a DIY project) and can be lethal if you have no experience with one. I've restored a few S-38s and a couple 50s-60s era tube xtmrs similar to the Chief, but I was brought up with this old type of gear. Have fun with it but more important be carefull and sit on one hand while testing any of this old AC gear especially the Hi voltages in the transmitter, the current can also do a number on you.
     
    Last edited: Nov 8, 2017
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  11. Oni

    Oni Scout

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    I recommend Deoxit contact cleaner and Deoxit Gold conditioner and protectant.

    Works great cleaning old oxidized switches and rheostats.
     
    Last edited: Nov 8, 2017
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  12. Biker Bushcraft

    Biker Bushcraft Tracker

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    Nice set to have around if you know what you are doing. I gave up tube rigs a long time ago just because they did not fit my situation. I had allot of fun with the ones I had and they worked great. Good memories of the shack at night with the tubes glowing through the vents on the rig.
     
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  13. DKR

    DKR Scout

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    Re-cap kits for most old rigs can be had thru Hayseed Hamfest. (https://hayseedhamfest.com/) These folks are the real deadl, easy to work with and ship as they say they will.

    Please note many old radio receivers that use the the 'Classic 5" tube lineup may have line voltage present on the radio case.
    THIS VOLTAGE CAN BE LETHAL

    My wife loves Old Iron, I have a shelf full of old Halicrafters - from a pre-WWII portable, made to compete with the Transoceanic (I have a tube version and a newer transistor model)


    My wife's S-40A and B look almost NIB. The S-38s are hot - good receivers and they have a hot chassis...

    So before working on these, check that the chassis/case is not hot with line voltage. Schematics, tuning steps and the like are all on line.

    [​IMG]
    S-40A

    [​IMG]
    S-40B

    [​IMG]
    S-40B with the works exposed. Very simple and easy to work on.

    Good luck!
     
    Last edited: Nov 13, 2017
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