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  1. O

    Cobra 29 520's

    Just wondering if anyone has tested or used IRF 520's, with what I've found, that have 93w output? Will these work? I've found 48w (that was the norm back in the day), 60w and 93w outputs. Want to know if it makes any difference. Thanks
  2. O

    irf520 mosfet for cobra 29

    Voltage for the 33-47uf cap? Does it matter
  3. O

    irf520 mosfet for cobra 29

    Is there a preference on the 520's? I see we can get them with a 48w or 60w output. Does it matter?
  4. O

    irf520 mosfet for cobra 29

    And No! I don't want to go into the radio business! Just want to play around with my own.
  5. O

    irf520 mosfet for cobra 29

    I understand your point. I'm no radio electronics wiz. I've mostly had people work on my radio's. However, I had a 148 with all the goodies back in the day That did 45w all day long and never seemed to get hot. I ran that into my Texas Star 500V and pulled 800w out of it no problems. I ran that...
  6. O

    irf520 mosfet for cobra 29

    The point I see is that if I run a 2w DK with 40w swing into my 4 pill it does about 800 maybe 850 on a good day. And it doesn't cost $10 bucks for a useless 40w amp.
  7. O

    irf520 mosfet for cobra 29

    Thanks I take it that they are all the same 1/4 or 1/2.
  8. O

    irf520 mosfet for cobra 29

    Is that 470 ohm resistor 1/4 or 1/2W?
  9. O

    Cobra 29 High Power mod with 2sc1969 transistor

    This link works. Do you happen to have the mod for IRF520's. I used to do the 520's back in the day (Like the '80's) so I'm in need of a refresher course. Thanks much.
  10. O

    Cobra 29 LTD classic tune up

    I am trustworthy so no worries. Thanks
  11. O

    Cobra 29 LTD classic tune up

    The link no longer works. Where can we find it now? Thanks
  12. O

    Cobra 29 LTD classic tune up

    The link no longer works. where else can we get it. Thanks
  13. O

    Sirio 2016 Base Antenna/Review

    Is this antenna as good as the Hy-Gain Vertical Antenna, 10/12M Super Penetrator 1.5kW - SPT-500? I've been using my SPT 500 since the seventies pushing almost 2000W with no problem. I thought I might check around for an antenna equal to or greater than what I have.