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Search results

  1. J

    Do you QRP?

    I used to enjoy this... using small transmitter designs from old ARRL handbooks, or Motorola books using the AN's from them (application notes). You can make simple AM or CW transmitters or receivers for next to nothing. For nostalgia, HF designs using tubes are not picky when it comes to...
  2. J

    Stupid things seen or heard at a CB shop

    Several times, in several threads, and off topic. That p-r-e-t-t-y much qualifies it as "trolling" or "spam"
  3. J

    Stupid things seen or heard at a CB shop

    Just reporting each one of these as spam.
  4. J

    Stupid things seen or heard at a CB shop

    If only HALF of these stories are true, then maybe understand the other side of the fence. Like when a customer, good intentioned, would come into the shop and ask a question. We would give them the proper technical answer, only to have them argue with us telling us joe billy bob's cb shop in...
  5. J

    johnson messenger 223 frequency adjust

    I LOVE the 223's. I have rebuild tons of them and owned over 20 or so. The grid leak mod is good advice, although I didn't use the same value, but the end result is the same. I also would so some mods in the final output section and modulator section as well. If you need a 32.9 rock, lemme...
  6. J

    RFI problems with antron 99

    I have seen this and solved it many times. While every situation is different, usually the problem has to do with common mode currents along the feedline more than anything else. You can ground everything till you are blue in the face, and also add ground radials which on this type of antenna...
  7. J

    Quick and Dirty Class "AB" mod for KL300p

    Hey guys, a few things. ALWAYS remember.. a bias source needs to be a low impedance, high current, stable source. The best, cheapest way to do this is with an AUX relay to turn the bias on and off during TX only. Do not forget to use RF bypassing in your circuit, lots of .01 caps and made...
  8. J

    Clean Signals from C Class!!!

    Just a few things if I may...... A "CB" style "class C" amplifier *COULD* sound ok on AM and SSB although this is not proper, and I would never recommend it. The reasoning behind this is because these amplifiers, while by definition ARE IN FACT class c, they are not biased deep into the class c...
  9. J

    cobra 2000 gtl $1495 on ebay

    Maybe it has NPC and the 2SC2999 mod. LOL
  10. J

    HTX-10 freq expansion with resistor?

    wow---didn't know there was a market for this. The radio can be expanded and not by changing a chip. Did many of them back in the day before the shop closed.
  11. J

    cobra xl350

    Yes, the ones I have seen have both.
  12. J

    Klm linear

    I seriously doubt the problem is the "radio's harmonics" first of all a harmonic by definition is a multiplier of the fundamental frequency. These tubes wouldn't have much gain as you start going up that high. Secondly the input circuit isn't designed for it, and third and MOST important is that...
  13. J

    emperor ts-5010

    Personally I think 300.00 is double what I would pay for one or what one is worth.
  14. J

    2SC2999 modification questioned

    I have a question, I have kept my mouth shut for a couple years mainly to avoid the controversy involved and let people think / do whatever they want to with their radios (because ultimately they will anyway) but when did this 2SC2999 modification for receivers that has been floating around the...
  15. J

    motor mouth maul mod receive mod cobra 29

    Probably because someone somewhere said that this was a good thing to do. Even then you are limited to the receiver bandwidth through various chains and filters.
  16. J

    President washington no transmit

    Yes, you will have either a 1306 driver and 1307 final or a 2166 driver and 1969 final.
  17. J

    can a higher power CB transmission cause damage to another rig closeby?

    I don't know about the other user's reply, it seems a little bit on the exaggerated side, however it CAN damage the PIN diodes in the front end that conduct when there is too much signal and shunt the RF to GND which they are supposed to do. However if one of them becomes shorted or partially it...
  18. J

    Yaesu Ft-50R 2 Meter 440 HT

    Yaesu Ft-50R 2 Meter / 440 HT. Asking 75.00 local pickup from Anaheim, CA Asking 75.00
  19. J

    40 channel CB Base Station TRC-492

    Radio Shack 40 channel base station TRC-492. Good condition, all functions work does about 24 watts peak. 30.00 cash and carry from Orange County, CA
  20. J

    Matched Pair New SD1446 Transistors

    Oh, local cash and carry doesn't tell you much unless I say Orange County area, Southern California.