Learn how to quickly deploy your Wolf River Coil SB1000 TIA, configure it for fast tuning changes when switching bands, and enable it for high performance. By using the 213″ telescoping whip, you can configure a 1/4 wavelength vertical that is resonant on 20m, 17m, 15m, 12m, 10m, and 6m with an incredibly low SWR (most bands less than 1.1). Using the coil, you will easily be able to tune for 40m.
Here are the links to the document that I reference in my YouTube video:
Wolf River Coil Tuning Guide – Excel Spreadsheet (so you can modify data/view formulas)
Wolf River Coil Tuning Guide – PDF
You can watch the video that I made of the tuning of my 213″ telescoping whip with my SB1000 here:
Below are the previous settings that I used to tune if you do not wish to use the method in the spreadsheet/video.
102″ Telescoping Whip
| Band | Whip Length | Coil Position |
| 6m | Only 1st section of whip extended | No Clicks – Top of Coil |
| 10m | 3 sections out + 6″ of 4th section | No Clicks – Top of Coil |
| 40m | All sections out | 3 Fingers Down |
213″ Telescoping Whip
| Band | Whip Length | Coil Position |
| 10m | 8 sections out + 1″ of 9th section | No Clicks – Top of Coil |
| 20m | 9 sections out + 13″ of 10th section | No Clicks – Top of Coil |
| 40m | All sections extended | 16 clicks down |
What about 17m? Thanks
This set of instructions “seemed” to work for my WRC Platinum and my 213″ whip. I still need to give it a shot with my radio and see if anyone can hear me of I them. Still a bit unsure of the spacing on the collar though. The other instructions (not for the Platinum) show a good bit of difference.
Thanks.
Harvey
KM6YFD
I have added a bit more information on how to do this. Please let me know what you think.
I have the Silver Bullet 1000, It has a good swr on 20 meters. Have not tried the other bands.
Thank you
Great write-up Dale on this method of tuning with the 213″ whip and coil. Did mine the other day and works like a charm.
Thanks and 73
Mike
KD2SXD
Mike, Glad you found it useful! The 213″ whip and coil perform so well and it comes in a great portable package. I have a new video I am finishing up on radials and how they can help with the performance. 73 – Dale W0DHZ
That’s great. Can’t wait to see it.
Hi Dale, Thanks for the spreadsheet.
I previously set my WRC SB and MFJ 1979 by trial and error (but got there in the end). How I wish this was available when I did that.
I now need to re-do all the markings on the whip so this will help that process enormously. By nature, I am not very methodical but I have amended the sheet in line with the UK band plans and how I will be using it (just the phone sections) so hopefully, this will make my life easier this time around.
Glad you found it useful! Happy you are customizing it to fit your needs!
On 6 and 10M, one could set the whip so you can get 1/2 l (wavelength).
When you day “3 sections out” are you referring to the smaller and thinner top sections. Or is it the three larger bottom sections? Possible it doesn’t matter?
By “section”, I was referring to one section of the whip. I believe I was referring to the lower bands, 15/12/10 when you only have a few of the top sections out.
Thanks for the spreadsheet. As an ex Minnesotan, living in Fl now, I can test any time .(just had get that in.) I’m really interested in your next video on the ground radials for the wolf River coil. Ive never been able to get that right so I kind of put that right..
Thanks,
73 Chuck KE0CC
I just ordered a WRC mini with the 213″ whip. I plan on following your method here to figure out where to mark the lengths in the whip, hopefully without running out of whip. I’m looking forward to your next video about how you made those radials and attachments on the based legs there. Pretty slick!
So glad to hear you are moving forward with this antenna. It has become of my top two favorite antennas for field use. I have a bunch of video complete that I just need to get up – stay tuned!
I made a mini that has 35 wires on coil, would I need to half the number you show (45 to 50cm) to start with. My coil is about 9″ or 22.86cm long.
Thanks
73 Cliff W4CBH
I’m a new ham (just 1 year), just got my General, but have not been on HF yet. Just got my WRC 1000TIA this afternoon, and looking forward to experimenting!
Watched your video on prepping for faster future setups and found it VERY helpful in planning ahead. Lots of good ideas and procedures!
Where can I find the video about radials. I haven’t been able to find that.
I’ve seen other videos that say “more radials” is more critical than “long radials”. Due to space limitations, I was planning on making up 3 or 4 bundles, each bundle having 5 or 6 radials, and each radial being 2m long. What are your thoughts about the impact of such an arrangement, compared to yours (of twenty-four 33-foot radials)?
Thanks for any further info!
-John (Please, do not publish email address. TY)
What diameter of radial wire are you using?
I was thinking of doing something similar but 14awg wire readily available to me complicates portable deployment and yours looks rather thin, curious if it’s 20awg or smaller?
I recently got my WRC antenna out to play with. I’m thinking about an A/B comparison with the Chameleon MPAS 2.0 system in vertical configuration.
I have the 213″ whip and the shorter coil. It was one of my first antennas and it is a great antenna if you don’t need band agility.
I just added the spike and the Sporty Forty to my system. I also built a ground field for my antenna. I have 18 wires that are about 16ft long. I also use APP for the connections. Your use of shrink tube is a good idea. I have mine tied with cable ties.
I’m going to mark my antenna with the custom ground field and then test with three of the WRC 33ft counterpoise wires. Since you have a DX Commander, you are likely aware of Rudy Severns’ work on ground fields for vertical antennas. It’s a good piece of work.
You left out the 30m band. I sometimes operate there when the main bands are busy. But I’m a code operator as well. If you do digital modes, then 30m is also an option for you.
I usually figure a VF of 0.95 for wire. What led you to use 0.93 for the whip?
Well done… 73 de AG7TX
Hi Dale – I’m newly licensed general and have the wolf river coils platinum model. I have Parkinson’s Disease so it takes my addled brain longer to grasp some concepts. My WRC is mounted on a pipe that is 3-feet above ground level. Do I subtract this distance from the measurements you give? Thank you so much for this very helpful info! Jim in Central Oregon K7NJL