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Thread: Rens DX100b Refurb

  1. 08-06-2014, 08:49 PM #1
    w3bny
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    Rens DX100b Refurb

    Ok Greetings all. I decided to take a mental health day and spent pretty much all of it down here in the basement beginning the refurb. Here's some highlights.

    1. Overall bottom deck. No overt zorch, exploded components or other WTFIT issues. Just dusty. Bit of dust gun and a soft brush.

    2. Issue number one. Busted phenolic so239. Easy enough to replace with a brandy new teflon one.

    3. Issue number two. Cold solder joint on the tuning caps. Easy enough to fix. Re-flow and fixed!

    4. All nice and purdy now!

    Went thru and checked screws, nuts, solder joints etc on the bottom. Found some loose stuff no biggie. Again, no cracked/bulged/blown components. Dusted and de-oxit'd all the snap switches and caps. Nice movement now. flipped back up. Started on the top deck with dusting and cleaning. No biggie. Started checking the tubes. Pulling each one out. Wiping down (no solvents just a soft cloth) and de-oxit of the pins.


    More in next post...
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  2. 08-06-2014, 08:54 PM #2
    w3bny
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    Part 2

    Welcome back...

    5. Problem number 3. WTF!!! Looks like I am going to have to buy a new set of 6146 finals! Bastard!

    6. Buh.... Eh. Not too expensive.

    So I am whileing away the evening cleaning tubes. Then up for a dram of rye and off to napppy bye land.

    More later!

    On Edit...

    I want to put every one of these tubes on a tester but I need to check my tester out to trust it...always something to do.
    Last edited by w3bny; 08-06-2014 at 09:03 PM.
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  3. 08-06-2014, 09:00 PM #3
    NQ6U
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    Fun chit, working on boat anchors—it helps that everything is big enough to see without magnification. I really enjoyed restoring the Drake twins and actually made a profit on the deal when I was done.
    Last edited by NQ6U; 08-06-2014 at 09:01 PM.
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  4. 08-06-2014, 09:10 PM #4
    K7SGJ
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    Quote Originally Posted by w3bny View Post
    Welcome back...

    5. Problem number 3. WTF!!! Looks like I am going to have to buy a new set of 6146 finals! Bastard!

    6. Buh.... Eh. Not too expensive.

    So I am whileing away the evening cleaning tubes. Then up for a dram of rye and off to napppy bye land.

    More later!
    Don't give up on the 6146 if the plate cap is the only problem, at least not just yet. If the wire still makes it through the tube envelope and the tube itself is good, remove the solder from the cap and take it off. You'll end up with the plate cap with a small hole in it. The cap can be glued back onto the glass with a non conductive heat tolerant adhesive and the wire fed through the hole and re-soldered. I have done that before, and as I recall I used Ambroid glue. I'm sure there are many other adhesives that would work, maybe something for automotive use can be found.

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  5. 08-06-2014, 09:13 PM #5
    N8YX
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  6. 08-06-2014, 09:40 PM #6
    W3WN
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    I MAY have a spare pair of 6146's from the 520.
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  7. 08-06-2014, 11:05 PM #7
    kb2vxa
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    Don't worry, I've re-soldered plenty of them without adhesive (you have those set screw heat finned caps a smart ham replaced the cheap clips with) and they worked just fine. He was smart enough to do that, so why couldn't he solder worth a poop? Oh, that's not a phenolic SO-239, it's Steatite.
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  8. 08-07-2014, 10:24 AM #8
    kd6vm
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    Quote Originally Posted by W3WN View Post
    I MAY have a spare pair of 6146's from the 520.
    Doesn't the DX-60 only use one 6146?
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  9. 08-07-2014, 04:58 PM #9
    K7SGJ
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    Quote Originally Posted by kd6vm View Post
    Doesn't the DX-60 only use one 6146?

    Yes, but he has the DX-100, which uses a pair.
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  10. 08-07-2014, 05:20 PM #10
    WØTKX
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