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WHAT??? ANOTHER SB-220????!!!!!!!!!!!!!

Discussion in 'Amateur Radio Amplifiers' started by WA6MHZ, Jul 31, 2017.

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  1. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    I have been told to use 2 back to back diodes across the meters. They use 1N5408s, I don't see whey 1N4007s won't work as I have a whole stockroom full of those!
     
  2. AF6LJ

    AF6LJ Ham Member QRZ Page

    Whoever told you that is stupid.
    They never bothered to actually applied OHM'S LAW to the problem.
     
  3. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    if it turns out we need a new FINAL TANK COIL AND BANDSWITCH, I know where there is one!!1
    20265016_10155367657654927_7922156659264647991_n.jpg
    Not that I want to DONATE it to the cause, as Sue thinks it is worth the BIG BUCKS on Ebay!!
     
  4. AF6LJ

    AF6LJ Ham Member QRZ Page

    I'll bring my VTVM on Saturday and we can measure the secondary voltage on the plate transformer.

    You need to talk to the owner about being paid for your labor.
     
  5. AF6LJ

    AF6LJ Ham Member QRZ Page

    That should cost the owner $75.00.
     
  6. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    http://www.zl2al.com/1807/heathkit-sb-220-modifications/
    http://www.bcdxc.org/heathkit_sb220_mods.htm
    https://www.orcadxcc.org/content/sb220_compendium_va7jw_rev2.pdf
    hotera.org/RESOURCES/documents/.../SB-220%20Rebuild%20with%20schematics.p.
    http://www.eham.net/ehamforum/smf/index.php?topic=72939.0
    thats what everyone does!!!
    I am ready to install them. The issue is do I REALLY need the 3A diodes or are 1N4007s good enough?
     
  7. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    EVERYONE assumes that all work done by CAT RANCH ELECTRONICS is on the house!!!
    I need money more than ever now!! and the HRO SWAPMEET Is only 25 days away!!!
    I hope I can sell my ULTIMATE GO KIT THERE, but I just know some RAT BASTARD will offer me $100 for it!!
    ( and then part it out and resell it for $1500!!!!)
     
  8. AF6LJ

    AF6LJ Ham Member QRZ Page

    I just did the calculations right in front of you.
    Do what you want.
    but you are in over your head on this project.
     
  9. AF6LJ

    AF6LJ Ham Member QRZ Page

    That is because you let people take advantage of you for whatever reason.
    ................ @WA6MHZ
    You need to start charging for your labor and fair prices for parts.
    Just Saying.........
     
  10. WA6MHZ

    WA6MHZ Subscriber QRZ Page

    The SB-226 Has back to back diodes across it's meters, and it works.
     

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