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10k for 2meters?
- Thread starter Tony
- Start date
you coulda told him WHY it isn't a good idea.....a coil effectively SHORTENS an antenna, while a FULL SIZED antenna SHOULD work much better. so, on CB freqs, full sized is a bit too big, BUT on 2 meters it WON'T be. if nothing else, a 'thicker' antenna MAY work a bit better then a whip on 2m, so experiment THAT way, don't waste the 10k.
...sorry, but a coil doesn't 'shorten' an antenna, it effectively makes a short antenna longer. A 'short' antenna has an over abundance of capacitive reactance. By adding inductive reactance, a coil, the reactance is 'balanced' (actually '0'), which is the definition of resonance.
I think it wouldn't be a very good idea to 'cut' a '10K' down for two meters. Just too many other ways to have a good two meter antenna. But, one way would be to shorten the vertical portion, 'scale' it down from it's roughly 27 Mhz design frequency length to the two meter band. That would probably necesitate re-doing the matching network. No idea what a used '10K' is worth, but it should be at least enough to buy a decent two meter antenna!
I'm just not exactly sure I'd be willing to do that 'cutting'/'scaling'. If Tony wants to, then have at it!
- 'Doc
I think it wouldn't be a very good idea to 'cut' a '10K' down for two meters. Just too many other ways to have a good two meter antenna. But, one way would be to shorten the vertical portion, 'scale' it down from it's roughly 27 Mhz design frequency length to the two meter band. That would probably necesitate re-doing the matching network. No idea what a used '10K' is worth, but it should be at least enough to buy a decent two meter antenna!
I'm just not exactly sure I'd be willing to do that 'cutting'/'scaling'. If Tony wants to, then have at it!
- 'Doc
you coulda just said that the 1st time ;-)
techically, it DOES shorten an antenna......a quarter wave antenna at cb freqs would be around 108". if that is too long for whatever reason, shorten it by coiling up part of it. now, throw in the part that goes: "A 'short' antenna has an over abundance of capacitive reactance. By adding inductive reactance, a coil, the reactance is 'balanced' (actually '0'), which is the definition of resonance." and we're all good.
on the plus side, tony the ham is looking to experiment with his amateur radio gear. having seen maybe 2 used 10k's ever, a new one is in the $80 ballpark.....
techically, it DOES shorten an antenna......a quarter wave antenna at cb freqs would be around 108". if that is too long for whatever reason, shorten it by coiling up part of it. now, throw in the part that goes: "A 'short' antenna has an over abundance of capacitive reactance. By adding inductive reactance, a coil, the reactance is 'balanced' (actually '0'), which is the definition of resonance." and we're all good.
on the plus side, tony the ham is looking to experiment with his amateur radio gear. having seen maybe 2 used 10k's ever, a new one is in the $80 ballpark.....