| Author |
Message |
    
Twa77
Intermediate Member
Username: Twa77
Post Number: 143
Registered: 1-2003
| | Posted on Monday, January 26, 2009 - 9:43 pm: | 
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Heres the dilemma. I have a pdl2 antenna. I cant decide if i should build it like the instructions say or ditch all the orbital match and use the 75 ohm coax matching method. Which would yield better results? All opinions and theories are welcomed and encouraged. |
Marconi
Advanced Member
Username: Marconi
Post Number: 801
Registered: 11-2001
| | Posted on Tuesday, January 27, 2009 - 6:10 am: |
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If I knew enough to have the confidence that I could modify the PDL2 with the 1/4 wave feeder, then I would just build me a Quad like I wanted from scratch and not mess up the PDL---which may well bring a good price on the market if in perfect shape.
This change in matching may also require a change in wire length as well. This suggest to me that these two different antenna ideas show a very different reactance at the feed point. I don't believe it is just a simple matter of replacing the gammas with 1/4 wave tuned feeders.
You may also have to provided two driven elements with the tuned feeder unless you use the SE idea of voltage feeding the antenna and that might really get complicated.
Sounds a little like to me, you have an issue with using the gamma design and think that the tuned feeder will outperform the Avanti design by some significant amount, so as you could tell with on-air comparisons? |
Airplane1
Senior Member
Username: Airplane1
Post Number: 1178
Registered: 5-2004
| | Posted on Tuesday, January 27, 2009 - 8:13 am: |
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I hear people who use the PDL-2 on air all the time so they are still a bunch out there. I ask how they like em and every one says they love em. I have one setup for 10 meters ready to go up in spring time so I cant wait to try it myself.
My opinion is to keep it, build it, put it up and enjoy it as designed and you will prob like it too.
Good luck |
Captian_radio
Advanced Member
Username: Captian_radio
Post Number: 531
Registered: 9-2004
| | Posted on Tuesday, January 27, 2009 - 9:51 am: |
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Do a google search for VE3SQB , he has a great site with lots of info on the PDL2.
Bob
Robert L. Spicer The days of radio are just beginning!
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Twa77
Intermediate Member
Username: Twa77
Post Number: 144
Registered: 1-2003
| | Posted on Tuesday, January 27, 2009 - 10:26 am: |
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I have extra parts to do it without wrecking anything i could even make a 3 element. but not sure how it would work. If anyone has made a 3 element and would share details it would be appreciated |
Sonny
Intermediate Member
Username: Sonny
Post Number: 189
Registered: 5-2004
| | Posted on Tuesday, January 27, 2009 - 7:36 pm: |
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Twa 77 I had a PDLII for years and the weather got to it after a long long time and they have very good rejection and to make a 3 element out of it I would think it would involve adding another set of elements on the front. And at a shorter length than your driven element. |
