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Search results

  1. 9

    Biasing power transistors

    Bump, No one can help me? When under load will this stabilize in class ab?
  2. 9

    New cobra 148s

    I once got a set 2sb817 to put in a galaxy. It came with a set of the complimentary pairs of npn. 2sd1047. I put one in the new cobra for the hell of it. Replaced the other one with 2sc1384. Similar to 2sc945 but a tad heftier. Pretty good results if I can get the damn thing back on freq I think...
  3. 9

    New cobra 148s

    Hey, don't get me wrong either. I wish cobra would turn it up a notch! Id love to be a cobra fanatic.. problem I love their pcbs. Much easier to work on then say.. galaxy.. problem is, they just haven't kept up with the trend.. I don't understand with magnum doing what they do you'd think cobra...
  4. 9

    New cobra 148s

    Yes... if I figure it out I'd love to share!
  5. 9

    opinions on which radio would be better for...

    Booty, why do you perfer those radios? Bc bjt output? I wish I had a good bjt radio for the base I'm getting. I'm scared to buy a used radio man.. I have a matched pair of 1969 I'm dieing to use
  6. 9

    New cobra 148s

    Lol I forgot I posted this. Entertainment at its finest. I'm very new school. Im not even a ham yet. But I do get my kicks off tinkering with this stuff. My opinion of the 148 is that it "was" a radio for the advance hobbyist to enter in to ssb. What I noticed with the new ones is, ANY thing...
  7. 9

    Biasing power transistors

    Hi everyone. I'm wanting to do something, I'm having trouble simulating due to simulator imperfections. I want to design a discrete 2 transistor regulator like this: Problem is when I plug it into the simulator with a 50 ohm load the "regulating" part of the circuit doesn't show voltage...
  8. 9

    New cobra 148s

    These crappy radios suck.. we all know it.. none of the less I have one here in decent condition and I want to see how well I can get it to work. In am I can't get the carrier any higher than 4 watts. This is not a problem for me, but in testing it seems like I should be able to peak it a...
  9. 9

    opinions on which radio would be better for...

    Thanks for the opinions guys. If it helps, I'm also very close to getting my technician licence. I know none of these are really designed as ham radios.. but I'm looking for rock solid ssb. No dimming lights, no voltage dropping. I'm also looking for something I can fix myself if it ever goes...
  10. 9

    opinions on which radio would be better for...

    Hi, I've been using mobile radios ssb for a while now from my truck. I'm kind of tired of running out to the truck to check for conditions + the fact that my mobile antenna is compromised compared to what I could do w a base. For a while I've been looking at the galaxy 2457 bc it is similar to...
  11. 9

    negative feedback + mosfet drain coil

    Hello everyone, I decided to combine these 2 questions just to hear the opinions of smarter people than me. Has anyone ever experimented with nfb on the final section of radios? I was watching a video about parasitic oscillations and fascinated me what might be happening that I can't see on my...
  12. 9

    so.. I tried the npc

    This is my concern. I'm not in it for the typical "power mod " in looking to experiment with audio. I want to do it like the big timers do but the only info I can get its to put a diode in. I understand the concept of diode clipping as I'm a guitarist as well.What I notice is dramatic flat on...
  13. 9

    galaxy "gnf"

    Has anyone figured a way to improve this feature ? I keep trying to get used to it but it's just too..... hmm can't find the word for it. It's like its too much of what ever it is that it's doing
  14. 9

    Looking for mic suggestions

    Rci sra-198 for pimps only
  15. 9

    sra-198

    I added the resistor and cap. Worked well! Id like to get a bit more bass back. Larger Cap?
  16. 9

    sra-198

    Just got this mic and I love it!! Only problem is there is s little to much low for my voice. Is there a way to put a cap in line to get rid just a tiny bit?
  17. 9

    carrier on ssb??

    I have a couple questions. When I turn my mobile amp OFF with my galaxy 959 it has a carrier on ssb and swings backward. When I turn the amp on it corrects it self. Is this due to coax length and swr? Or spurious emissions need to be tuned out? Thanks in advance!
  18. 9

    10 watt or 25 watt slug?

    Damn.. I thought vi scored a quality meter when I got my 65$ bird..
  19. 9

    galaxy 959 dual final (...yes another thread)

    Has any one ever attempted using complimentary pair s pnp/npn to make push and pull? I haven't seen many rf pairs
  20. 9

    galaxy 959 dual final (...yes another thread)

    Sorry to v attack everyone with questions but I have a couple more. After adding the second final I retuned the output chain. I was told to flip to usb. Ahhhhh in the mic and tune to max wattage.. I noticed on the first coil it was a bit off..v after a couple turns the output jumped up like...