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Rebuilding R-390A Power Supply Caps. Step by Step With Photos

Discussion in '"Boat Anchor" & Classic Equipment' started by KC8VWM, Apr 16, 2016.

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  1. KM1H

    KM1H Ham Member QRZ Page


    OK, thanks and much appreciated

    Carl
     
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  2. KC8VWM

    KC8VWM Ham Member QRZ Page

    Your welcome!
     
    AF6LJ likes this.
  3. KD2ACO

    KD2ACO Platinum Subscriber Platinum Subscriber Life Member QRZ Page

    How's yer radio working out, Charles? Thanks for the link for new SB-200 front panels. That worked out nicely!
     
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  4. KC8VWM

    KC8VWM Ham Member QRZ Page

    The only thing left is to do on the R-390A is remove the front panel and repaint it. I will post pics in this thread when I get to that part, but as far as everything else goes I use it quite regularly and it working great. Thanks again for your help with the toobes Chris !

    Glad to hear the SB 200 black panel is working out. I entirely restored my SB 200 and the powder coated replacement panel made it complete and like brand new again.
    MVC-014F-1.jpg

    MVC-003F-1.jpg


    The old workhorse now works and looks like a champ. :)
     
    Last edited: Dec 4, 2017
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  5. KD2ACO

    KD2ACO Platinum Subscriber Platinum Subscriber Life Member QRZ Page

    What kind of 572s are those?
     
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  6. KC8VWM

    KC8VWM Ham Member QRZ Page

    Old pair of Raytheon.
     
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  7. KM1H

    KM1H Ham Member QRZ Page

    Actually built by Cetron as told by the shoulder top. If they had the round top they are by United Electronics.
     
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  8. KC8VWM

    KC8VWM Ham Member QRZ Page

    Interesting.

    Here's a close up photo...

    MVC-005F.jpg

    What do you think Carl? ...United or?

    Not sure if the boxes tell you anything or not...

    MVC-003F-2.jpg
     
    Last edited: Dec 28, 2017
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  9. KM1H

    KM1H Ham Member QRZ Page

    Look at what I said above and then look at the tubes again! I have a NIB pair of the same Raytheons plus just about every US branded ones.

    And Sue, quit laughin'
     
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  10. AF6LJ

    AF6LJ Ham Member QRZ Page

    :)
    Not laughing I made a gaff on the air today...
    It was regarding GG amplifier efficiency I said the drive power was part of the input power and would not be subtracted from the total input power.....
    It didn't take long for me to pull my foot out of my mouth when someone corrected me... :)
    Yes I knew better but engaged mouth before checking which gear brain was in...
     

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