ad: elecraft

What to do witha KAPUT TUBE

Discussion in 'Ham Radio Discussions' started by WA6MHZ, Jun 19, 2017.

ad: L-HROutlet
ad: l-rl
ad: L-MFJ
ad: Subscribe
ad: l-assoc
  1. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    I was thrilled to nail a 3-500Z for $5 at the Claremont swapmeet, but at the same time bought a 40A Switching Power Supply. Either I was distracted about the tube or some rat bastard ripped the PS outta my shopping cart!! IT was missing when I got home.!!! I needed that PS for Field day!!!

    So today I got the tube out and found that the broken pin was a FILAMENT PIN!!!
    I had hoped it was a grid pin, as then I could still use the tube!
    but ALAS, it was the filament. I hooked a PS and tried it. YEP, it still lit fine
    So I tried soldering a wire onto the pin.
    The tube cracked and it was GAME OVER!!!!

    So WTF can you do with a PRETTY 3-500Z with a Broken pin and a cracked envelope????
    Make something pretty!!!

    Since the tube was cracked already, I broke out the glass seal on the bottom and wired up some ORANGE LEDs to put through the hole down to the filament area.

    I then sealed the hole with JB WELD that holds them in place
    and now it lights and looks like a FILAMENT

    So now I will finda pretty block of wood and mount it on it. The LEDs run on 12VDC

    Attached Files:

    K9ASE, W6ELH, NL7W and 1 other person like this.
  2. KP4SX

    KP4SX Subscriber QRZ Page

    Good thinking, Pat!
    NL7W likes this.
  3. AF6LJ

    AF6LJ Premium Subscriber QRZ Page

    You could build a PWM controller with one section of a 556, use the other section to generate a slow triangle wave and use that to control the PWM on the other half of the Five-Fifty-Six...
    Then the LED will get bright and dim......
    It will look Cool.

    UV and RED together would look cool...
    AE9AM likes this.
  4. W7UUU

    W7UUU QRZ Lifetime Member #133 Life Member Platinum Subscriber QRZ Page

    Purty :)

    N7ANN, K9ASE and AF6LJ like this.
  5. KV6O

    KV6O Ham Member QRZ Page

    Controlling 3 color LED's is a good beginner Arduino project, you could have it read a thermoeter and be orange/red when it's hot, and green/blue when it's cold... Or Red when TX'ing, Blue when RXing...
    NL7W, W7TCT, W7UUU and 2 others like this.
  6. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    They make bicolor and tricolor LEDs now.

    If you use tricolor R-G-B LEDs and build a control circuit you can make every color of the rainbow out of those and make it flash up and down like KITT the car except hers were horizontal.

    We make a RAID disk array using all tricolor LEDs for all the drive activity lights. If a customer says, "I'd like my drive activity lights to be yellow" (or orange, or purple, or really any color at all) we can program a microcontroller to bias them for that color and the customer has exactly what he wants.:)

    You could have the latest, greatest "all solid state 3-500Z," and sell it on eBay for $1000.:p
    NL7W, KU4X and AF6LJ like this.
  7. AF6LJ

    AF6LJ Premium Subscriber QRZ Page

    Those are nice LEDS but they don't do deep purple very well...
  8. N1BCG

    N1BCG Ham Member QRZ Page

    Now that it's fixed...


    (List as "seller refurbished")
    K2XT, WN2C and N5AL like this.
  9. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    I used ORANGE LEDS cuz it looks just like the filament lit normally. THough when running in an amp, they get more yellow. Orange at lower voltage. So it looks just like the filament is still lit, just not very bright. More LEDs wouldnt fit. I tried.
    AF6LJ likes this.
  10. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    Puts out .0000001 GIGAWATTS!!
    Gain of -.0005 dB
    AF6LJ likes this.

Share This Page