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#1
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FS: MFJ 220mhz ground plane $20.00
This is the MFJ 1/4 wave ground plane antenna. It is currently cut for 220,
but can be cut down for 144mhz. It is assembled at the moment. I had it up for about 6 months, but decided to take it down. It is in like new condition. Comes with U bolt for mounting. $20.00 plus $5.00 shipping. email direct if interested |
#2
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While I am somewhat adept at cutting a 144 to 220, for the life of me I do
not know how to do the converse... "CommCtr1" wrote in message ... This is the MFJ 1/4 wave ground plane antenna. It is currently cut for 220, but can be cut down for 144mhz. It is assembled at the moment. I had it up for about 6 months, but decided to take it down. It is in like new condition. Comes with U bolt for mounting. $20.00 plus $5.00 shipping. email direct if interested |
#3
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While I am somewhat adept at cutting a 144 to 220, for the life of me I do
not know how to do the converse.. May be worth the $20 just to find out how that is done. 73 Gary N4AST |
#4
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Just how does one go abt STRECHING the radiator since 220mhz requires a
shorter radiator than 144mhz. If you would impart this information to the ham community, I do beleive that you will be a hero!!!! Or at very least well liked!!! Dan -- If I am tired now, why do I have to RETIRE later? |
#5
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Hmmm ?? A construction project!! Or, is it a recipe?
Start with a 48 inch length of stainless steel 1/16 inch diameter rod. Add a new coil at one end to be tapped for a 50 ohm match at 146 MHz. Add a new capacitor connected in parallel with the coil. Adjust capacitor and inductance to achieve 146 MHz resonance. Using an antenna analyzer locate and solder a tap coil for 50 ohm match. Seal all with a strong weather proof sealant. Install in mount provided at point of sale. Install on vehicle. After failure, replace with commercial 146 MHz antenna Deacon Dave, W1MCE |
#6
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Well you see gentlemen, after spending a day up on the roof, it appears I
typed without proof reading. You would all be correct, how would you cut a 220mhz antenna to work on 144mhz????? Good question! So let me stand corrected and say, it can be cut for 440mhz.......................... NOT 144mhz. Thanks for noticing my mistake............ 73 Lou |
#7
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Thanks for noticing my mistake............
We all make em'. Good luck selling the antenna. 73 Gary N4AST |
#8
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20 bux hu?
You can built one out of a SO-239 coax connector, a aluminum L bracket. A U-bolt, and some welding wire/and or solid copper and some solder....maybe 5 bux at most. Dan/W4NTI "CommCtr1" wrote in message ... Well you see gentlemen, after spending a day up on the roof, it appears I typed without proof reading. You would all be correct, how would you cut a 220mhz antenna to work on 144mhz????? Good question! So let me stand corrected and say, it can be cut for 440mhz.......................... NOT 144mhz. Thanks for noticing my mistake............ 73 Lou |
#9
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AWW ... you took all the fun out of the project :-)
DD CommCtr1 wrote: Well you see gentlemen, after spending a day up on the roof, it appears I typed without proof reading. You would all be correct, how would you cut a 220mhz antenna to work on 144mhz????? Good question! So let me stand corrected and say, it can be cut for 440mhz.......................... NOT 144mhz. Thanks for noticing my mistake............ 73 Lou |
#10
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"Dan/W4NTI" w4nti@get rid of this mindspring.com wrote in message ink.net... 20 bux hu? You can built one out of a SO-239 coax connector, a aluminum L bracket. A U-bolt, and some welding wire/and or solid copper and some solder....maybe 5 bux at most. Too expensive....all you need is an SO-239 and a coffee can with a piece of copper wire and some solder Dan/W4NTI "CommCtr1" wrote in message ... Well you see gentlemen, after spending a day up on the roof, it appears I typed without proof reading. You would all be correct, how would you cut a 220mhz antenna to work on 144mhz????? Good question! So let me stand corrected and say, it can be cut for 440mhz.......................... NOT 144mhz. Thanks for noticing my mistake............ 73 Lou |
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