Copper Talk » Ask The Tech » Antennas » Predator 10K. Double coil 22", or single coil 27"? « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Jameslarson
Intermediate Member
Username: Jameslarson

Post Number: 197
Registered: 4-2006


Posted on Monday, June 12, 2006 - 8:14 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hi. OK, Well I have the double coil 22" shaft predator. Good so far. Odd enough, I had to trim so much off the whip, that the length from the base of the antenna to the part where the whip gets inserted is longer than the whip itself. I have 1:2 SWR with this antenna.

I just acquired a 27" shaft single coil predator from a friend. I didn't have to trim the whip as much, and I have the SWR literally 1:0. There is absolutely no movement whatsoever. It is flat SWR.

So my question is, which antenna "gets out" more? I'm thinking the single coil 27" only because the coil is slightly higher (27" compared to 22"), and it only has 1 coil instead of 2. Also, it's overall length is a bit longer than the 2 coil. Is there significant differences in "getting out" between the 2 models? Thanks.

PS--yes, there will be a 667 in use with either antenna. Thanks.
Top of pagePrevious messageNext messageBottom of page Link to this message

1861
Advanced Member
Username: 1861

Post Number: 513
Registered: 2-2004


Posted on Monday, June 12, 2006 - 9:59 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

IT WILL DEPEND ON YOUR MOUNTING , BUT THEY BOTH SHOULD WORK BASICALLY THE SAME . JUST CURIOUS , ON YOUR 27 SINGLE COIL , WHAT IS YOUR OVERALL LENGTH SINCE YOU TUNNED IT ?
Top of pagePrevious messageNext messageBottom of page Link to this message

Road_warrior
Senior Member
Username: Road_warrior

Post Number: 1609
Registered: 7-2004
Posted on Monday, June 12, 2006 - 10:06 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Best thing to do is test them with a
friend/s help. Everybody being Stationary.
Top of pagePrevious messageNext messageBottom of page Link to this message

Jameslarson
Intermediate Member
Username: Jameslarson

Post Number: 198
Registered: 4-2006


Posted on Monday, June 12, 2006 - 10:31 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Mounted dead center on top of truck roof. I will measure it tomorrow and find out. It is the antenna mounted to a heavy duty quick release, which in turn is connected to a heavy duty pot belly spring, which in turn is connected to the predator lug style mount. You can see pictures of the double coil here on coppers "members pictures" category.
http://www.copperelectronics.com/cgi-bin/discus4/board-auth.cgi?lm=1148513025&file=/77380/90224.html
Top of pagePrevious messageNext messageBottom of page Link to this message

Patzerozero
Senior Member
Username: Patzerozero

Post Number: 2977
Registered: 7-2004


Posted on Wednesday, June 14, 2006 - 4:51 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

i noticed absolutely no difference between my single or double coil. the single coil is 3" or so longer. that's why i went to the double. i took about 16" or 18" off the double's stinger. the stinger is just a hair shorter then the rest of the antenna. SWR's were 1.1:1 on either. on a mag mount .
Top of pagePrevious messageNext messageBottom of page Link to this message

Dale
Intermediate Member
Username: Dale

Post Number: 472
Registered: 12-2002
Posted on Thursday, June 15, 2006 - 2:25 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

im told at a site that carrys them the 27inch single coil tunes the best out them all and performance should be about the same.
Top of pagePrevious messageNext messageBottom of page Link to this message

Jameslarson
Intermediate Member
Username: Jameslarson

Post Number: 207
Registered: 4-2006


Posted on Thursday, June 15, 2006 - 3:31 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Yes, this single coil definetly tunes the best. I mean literally flat flat flat SWR 1- 40. The meter doesn't even move. For a minute I thought the meter was no good. I used 4 different meters, and completly flat on all meters. The double coil was close. I got 1:1 to 1:2.5 across 40 channels on the double.

This single coil is a bit longer overall, and I am hitting trees a little more. But every little ounce of energy, length and SWR helps when trying to talk DX. Thanks.

Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: