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  1. HARDROCK

    Best Moblie Antenna for OTR Truck

    AA4PB Member Posts: 14006 Notice the last paragraph. This explains my case best. MFJ-259 measuring antenna resonance « Reply #3 on: December 27, 2006, 07:36:00 PM » To adjust an antenna to resonance, you adjust it until the reactance is zero. The value of the remaining load resistance is...
  2. HARDROCK

    Best Moblie Antenna for OTR Truck

    The reason efficiency peaks is because SWR is also lowest around resonance. We have to be careful how we word this stuff. It is not resonance that causes the peak, it is also NOT SWR that causes it. It is a system issue, and SWR cannot be low if the antenna system is not resonant. BUT, a...
  3. HARDROCK

    Best Moblie Antenna for OTR Truck

    CTR said: ↑ First of all, using the word "resonance" is pointless. I'm not sure where that came from, but it is a nebulous parameter. By definition resonance is when voltage and current are in phase, or when reactance is zero. So what do you call "resonant"? Do you mean when the imaginary part...
  4. HARDROCK

    Best Moblie Antenna for OTR Truck

    Does a antenna receive better at resonance ?
  5. HARDROCK

    Best Moblie Antenna for OTR Truck

    Lol..... nothing like some humor. I think its best you and i sit back and Listen. CTR wrote the book on this stuff. Problem is he has very limited time. The Db has the knowledge to ask the correct questions , especially for LEARNING. That should be the Key here.
  6. HARDROCK

    Best Moblie Antenna for OTR Truck

    Me too. excellent point Db.
  7. HARDROCK

    excellent .... bad grammar.

    excellent .... bad grammar.
  8. HARDROCK

    Thanks for your excllent post.

    Thanks for your excllent post.
  9. HARDROCK

    Best Moblie Antenna for OTR Truck

    Thanks CTR . Finally Truth !!! Tony
  10. HARDROCK

    Which CB Shops are still accepting mail-in repairs?

    Rays Cb shop west memphis Ak . Is very good and fast trunaround.
  11. HARDROCK

    Best Moblie Antenna for OTR Truck

    I agree .
  12. HARDROCK

    Best Moblie Antenna for OTR Truck

    Ctr agree that fs and applied power is. I would like to hear your comments on tuning the mobile antenna via FS METER Tony
  13. HARDROCK

    Best Moblie Antenna for OTR Truck

    Thanks again for w8ji advice. The below is from Tom Many high gain high efficiency antennas or antenna systems are technically not "resonant antennas". Most AM broadcast towers are not resonant lengths, although most are tuned and matched at the base, there would be little difference if they...
  14. HARDROCK

    Best Moblie Antenna for OTR Truck

    The below is very Good advice . Thanks to Tom w8ji consultant engineer. That just isn't true as a blanket statement. Resonance does not determine efficiency. Efficiency is dictated by (radiation resistance/radiation resistance + loss resistance)times 100 when both are normalized to the...
  15. HARDROCK

    Ss 3900 Pop On Transmit Fix

    I got so use to the kenwood ts-50 not making the pop in speaker , that the ss3900 was driving me nuts. It took me 2 years of research to find this modification. Seems the cb crowd could care less. That includes the majority of cb techs. Anyone have questions , I am willing to help. Tony
  16. HARDROCK

    Ss 3900 Pop On Transmit Fix

    The 2 caps in front of the audio ic eliminates the nasty pop on transmit that is heard in the external speaker when the mic is keyed. Bad design . Typical cb junk. The audio ic is switched off instead of being biased off as should be. The wire in between the pa / ext spk jacks on the...
  17. HARDROCK

    Best Moblie Antenna for OTR Truck

    The 1.5 reading was the internal reading on the 29 swr meter. Not the analyzer.
  18. HARDROCK

    cobra 29 volume problem

    I had the same problem with the recieve being very quite and had to turn volume up on distant stations. And turn back down on close up stations. My problem was the antenna not being tuned correctly.