Page 1 of 1
mismatched antennas...how bad ??
Posted: Mon Dec 22, 2003 4:09 pm
by mikerabbit
How bad would it be for me to tx aprox 15watts UHF into a lowband whip cut for 45mhz? Am i looking for tons of trouble?
Mike
Re: mismatched antennas...how bad ??
Posted: Mon Dec 22, 2003 4:33 pm
by Jim202
mikerabbit wrote:How bad would it be for me to tx aprox 15watts UHF into a lowband whip cut for 45mhz? Am i looking for tons of trouble?
Mike
The amount of trouble your going to end up with, sort of depends on what TX your gouing to use and how big your pocket book is. Many of the newer solid state transmitters are not very forgiving when the SWR gets high. Some of the top end radios have protection built in, the rest don't.
Solid state transmitters have a tendency to go bad with high SWR on the feedline. The old tube transmitters were much better known to forgive high reflective power levels.
So your answer depends on how much you want to spend to repaire blown PA stages.
Jim
Posted: Mon Dec 22, 2003 4:46 pm
by Monty
Hi Mike:
All I can offer you from a Certified Technicians point
of view is [ Don't ]
These later model Maxtracs, ( other radios too ), have
VSWR protection, and they cannot provide enough protection
against a sizable hole a PA failure might make in your wallet.
Play it safe, get the right antenna, or a Mag Mount antenna
will get you by. ( alot cheaper too )
Monty
Posted: Mon Dec 22, 2003 4:59 pm
by mikerabbit
Thanks for the advise I will pick up the right antenna tomorrow!
Mike
Posted: Tue Dec 23, 2003 9:08 am
by Znarx
customer: "what do you mean I have to buy a new antenna??...the plug on the wire is the same one as my CB!!!...I should be able to just plug it into my new VHF radio right?!..RIGHT?!!!!"
me: <sigh>..launches into explanation of wavelengths, frequencies,VSWR and tuned whips as his eyes glaze over and he reaches for his wallet to shut me up...
...Z
Posted: Tue Dec 23, 2003 6:22 pm
by MO_TRASHER
Znarx wrote:customer: "what do you mean I have to buy a new antenna??...the plug on the wire is the same one as my CB!!!...I should be able to just plug it into my new VHF radio right?!..RIGHT?!!!!"
me: <sigh>..launches into explanation of wavelengths, frequencies,VSWR and tuned whips as his eyes glaze over and he reaches for his wallet to shut me up...
...Z
Been there, done that.
Happy Holidays
Posted: Tue Dec 23, 2003 6:42 pm
by natedog224
Can we say Melted Output stage in a miniature purple mushroom cloud.
Fun when its on purpose though
