Yellowstone Park K-0070 | Parks On The Air Adventure and Lessons Learned

In early September I took my 22 ft. travel trailer (camper) to Yellowstone Park for a Parks on The Air (POTA) adventure. I stayed at Fishing Bridge RV Park and I made most of my contacts from there. The Icom 7300 was in the camper and since there was very limited space at the campsite, I used the Tarheel 200A attached to my tow vehicles bumper. It worked very well most of the time. Yellowstone Park is beautiful in the Fall!

Yellowstone park

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Radio Equipment for Yellowstone Park

As I said, in the camper I had the Icom 7300. It was running off battery power. I learned over the summer, when the camper electrical mains are on, the 7300 gets too much electrical interference to operate, so I use it on battery power with the electrical mains turned off. Not really a problem, just a minor inconvenience.

For mobile and portable operation in Yellowstone Park I had the Icom 7000 in my vehicle and the Elecraft KX2 for use at picnic tables.

The laptop is an older Lenovo P580. It’s been updated with a 500 GB solid state hard drive, so it’s plenty fast enough for what I do.

yellowstone park


I used the Tarheel 200A mobile and while at the campground. Disconnecting it from the Icom 7000 and attaching to the Icom 7300 in the camper is easy enough. I just run a 50 ft. coax between the two and get the Tarheel as faraway from the metal skin of the camper as possible.

At the picnic area I had a homebrew antenna consisting of a 6 ft. pig tail of 50 ohm coax with a PL259 connector to attached at the radio. Then 50 ft of 300 ohm twin lead. The twin lead was split approx. 33.5 ft. up with each leg of the split approximately 16.5′ long. This antenna tunes up very nicely with the Elecraft KX2 internal tuner. However, I made only one contact (CW) with it. An almost identical antenna can be found in the ARRL “Portable Antenna Classics” book on page 46. “A Portable Twin-Lead 20-Meter Dipole”, by Rich Wadsworth, KF6QKI.

I contribute the lack of QSOs to my location in the trees (heavily wooded) and it being too early in the morning. Otherwise I think this antenna should have worked very well.


All in all most of my contacts were made from the camper using the Icom 7300 and Tarheel 200A. With 100 watts it was pretty easy to make contacts in the early morning hours on 80 Meters. The early morning was a good opportunity before leaving camp for a full day in the park. The roads were still congested, even at this time of year.

The remainder were made from my vehicle at turnouts in the northeastern part of the park. It’s not hard to find wide open areas relatively free of interference from others (vehicles, RVs) and make contacts either on SSB or PSK31.

FT8 lacks the ability to send the park number and I could have tried FT8Call, but it was not in the cards this time.

CW was disappointing, but again I was limited to 5 or 10 watts and an inferior location among the heavy trees.

I had a total of 39 POTA QSOs and more contacts just while driving in the park. I also checked into my favorite nets in the morning and late evening.

Lessons From Yellowstone Park

  1. Cell service is very, very limited in the park. Data service is non existent if you use AT&T like I did. Therefore there was no way for me to self spot on the cluster. The one spot that I was aware of did help. I made a few contacts right after the station confirmed he spotted me. (See the video below).
  2. Stay away from heavily wooded areas for operating. Even though the beautiful picnic areas near the Continental Divide looked inviting, they were too heavily wooded. Open areas are best in my opinion. Even if I have to use a 20 ft. telescopic mast to erect the antenna, it’s better than a 30 ft. antenna in the trees.
  3. Most bad electrical noise doesn’t come from my vehicle, but from others, so finding a secluded turnout in an open area is ideal. My attempt at the Old Faithful parking lot was uneventful. Too many vehicles (RVs and cars) coming and going.
  4. Operating PSK31 mobile is a lot of fun, it is effective and it’s easy to continue operating even when passersby stop to ask questions 🙂

Here’s my short video compilation of events in Yellowstone. See the Bison Bonus footage!

Mini60 SARK100 Antenna Analyzer

This little gem came in real handy in the field. I used it to adjust my Tarheel antenna when I didn’t feel like using the radio (long story). I have used it to adjust my mobile Hustler antennas and also to check the long wires and home-brew antennas I made for the field. OH8STN introduced this in one of his videos, so I picked it up on E-bay for $110. This is the one I purchased and the seller I got it from>> SEE: MINI60 SARK100 Antenna Analyzer.

I’ll do a video on the Mini60 in the future.

Thank you!

A big thanks to subscribers and everyone who posts questions and comments to me with ideas and suggestions. I sincerely appreciate it and hope this website helps Ham operators.

Photos From Yellowstone Park

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I'm an Amateur Radio enthusiast. I love the hobby and experimenting with radios, antennas and software. On my YouTube channel I upload videos on the Icom 7300 and Icom 7610 along with Ham radio software programs. I hope to inspire people to try new things in Amateur Radio.

8 Responses

  1. Werner DC8QT says:

    Hello Rich,

    very nice Fotos and Video. I wich we over here in Europe would have such a beautiful National Parc.
    Thank you.

    My question is in regard to the batteries you used to run the IC 7000 full Power? Is it part of the Camper and
    what is the Ah and how do you charge it (during Drive, Solarpanel, Generator?

    Thank you for all the good Stuff on your Videos

    vy 73 de Werner, DC8QT nr. Frankfurt Germany

    • K0PIR says:

      Hi Werner,

      It’s nice to hear from you and thank you for the comments.

      The battery for the Icom 7300 in the camper is a marine battery. I believe it is about 80Ah and charged when on shore power with a marine batt charger.

      For mobile I have two batteries and the one for the Icom 7000 is a marine batt and about 80Ah. It’s charged when running the engine. The trick for that is the voltage booster used when the engine is not running. The 7000 as you probably know needs voltage and will either not put out much power or will shut down when voltage is low.

      I got an inexpensive voltage booster off Ebay and with the engine off I get close to 100 watts outs and the 7000 hasn’t shut down on me yet. So I’m pretty happy with it. You can find it here: DC 12V To DC 13.8V 25A 345W Boost Power Step Up Converter Regulator Module New

      I hope this helps.

      Rich, K0PIR

      • Werner says:

        Hi Rich,

        Thank you for the Information on the Booster. I just ordered one. I currently use a solution with a
        high capacity ( 1F) capacitor like the ones in Car Audio Booster.

        I’ll let you know how my IC 7000 likes the “new” power.

        And: please continue with your great Videos on IC 7300 and KX2


        Werner, DC8QT

        • K0PIR says:

          Hi Werner,

          Thank you for leaving a comment and I am very interested in how it works for you. As I said, I have been using it and it’s been about a year I believe. No problems and it works good for an inexpensive booster. The others I looked at were $100+.

          Rich, K0PIR

  2. George Salinas KD4FJ says:

    Thanks for the tips on operating in the field. Thanks for the videos and software setup for the Ic 7300 and the IC 7610.

  3. Dick Boley says:

    I am interested in your comments on the TarHeel. You mentioned keeping it away from the metal on the RV. Wondered how you had it set up – on ground, above ground, radials ground or above?

    Dick N3HKN with “park envy”

    • K0PIR says:

      Hi Dick,

      Nice to hear from you and thank you for commenting.

      I used the Tarheel while it was on the bumper of my vehicle. I just detach the coax at the base and run a coax from the Tarheel to the camper. I pull the vehicle away from the camper because it will interfere with the SWR on the Tarheel if it is too close (within 4 ft. or so). I try to get it as far away as possible though. I have a memory controller so when I change bands I go to the vehicle and hit a button. When I need to I use my MINI60 to tune the Tarheel.

      It’s an older Tarheel 200A and works just great. I am very happy with it. I get 59 reports all of the time. It is mounted to the steel bumper of my vehicle. It’s got good grounding and bonding.

      Someday I am going to mount an antenna on the camper. I haven’t decided how to do it yet.

      Rich, K0PIR

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