Matt’s Weekend POTA Roundup!

Many thanks to Matt (W6CSN) who shares the following post from his blog at W6CSN.Blog:

Weekend POTA Roundup

by Matt (W6CSN)

It’s been a stormy past several days here in Northern California, but if anything, the weather only amplifies my motivation to go outside and get on the air.

Rather than do a separate writeup for each, this post is a roundup of my last four POTA activations, from Friday, February 2nd through Sunday, the 4th.

A faint rainbow splashes down in front of Angel Island

Thursday and Friday had been wet, with one storm in a series moving across the Bay Area. However, by Friday evening the cold front had passed and there was a break in the rain. This was a perfect opportunity to try an after work activation at the Presidio of SF (K-7889).

I hadn’t used the QCX-Mini in a while, and this activation reminded me why. I believe what is happening is that being so close to the antenna, RF interference causes clicking while keying, nearly to the point of distraction. I need to experiment with RF chokes on the key and audio lines to see if that improves the situation.

Fed up with the RFI on the QCX-Mini, I switched over to the MTR-4B which doesn’t seem to suffer the same issue. I wrapped up the activation after netting 21 QSOs in the cold west wind.

All QSO maps in this post are from

The next bout of rain wasn’t due to arrive until later Saturday afternoon. This was a change in the forecast that subsequently altered my plan to stay in Saturday soldering on my QMX Hi-Bander project.

Initially I went to Fort Point (K-0819) in the hopes of changing it up from my usual activation park but there were just too many people there. So seeking relief from crowds, I crossed the Golden Gate Bridge and went up on the slopes of Mt. Tamalpais.

I parked at Trojan Point at an elevation of approximately 1800 feet. See this post for more views from this location. The temperature was in the mid-40s, which is cold for us coastal Californians. Besides, the winds were picking up ahead of the next storm so I operated from the comfort of my vehicle using the Gabil 7350T base loaded vertical antenna on 15m and 20m.

This activation used the FT-818 and yielded 23 contacts, including JH1MXV from northwest of Tokyo, Japan coming in fairly strong on 21 MHz.

Driving back to San Francisco takes me right through the Presidio of SF (K-7889) and noticing that it was after 00:00 UTC, I made the last second decision to divert to East Beach to see if I could work in another activation before the anticipated rain.

At my usual spot for activating this park, it took only moments to raise the MFJ-1979 20m quarter wave and do a quick deployment of the MTR-4B on the trunk of the car. The wind was picking up, but not nearly as strong as it was up on the mountain.

After seven QSOs, the skies began spitting raindrops, this was going to be close! I closed the cover of the Maxpedition pouch to protect the radio and battery while the Bencher paddles could tolerate a little bit of moisture.

I was happy to have a Rite-In-The-Rain notepad for logging [Amazon affiliate link], because now I was certainly writing in the rain! Three more contacts and the activation was concluded with a hunt of Jim, WB0RLJ, in K-4011.

The next big storm blew in overnight Saturday and into Sunday morning with heavy rain and high winds. It seemed almost certain that I would not be heading out today. However by the late afternoon, the barometer, which had bottomed out at 991 millibars, started to check back up and some blue sky appeared between the cumulus clouds. The winds however were still running high.

A window of opportunity?

Seeing as the rain had stopped for the moment, I quickly put together a plan for K-7889 to operate from the car with the shorter vertical antenna on a roof magmount. Driving through the Presidio of SF there was lots of debris and even detours because of downed trees.

Once down at East Beach, I got straight to work with the FT-818 on 20 meters. The winds continued to blow unabated while I worked stations from the southern plains through the Pacific northwest. About halfway through this operation, another wave of rainfall quickly moved in, as such I was happy to be in the dry and warm confines of my vehicle.

I have to put in a good word about the Gabil 7350T antenna. While it is a short vertical, it tunes easily and performs well on the higher bands. I don’t have an exact count, but this antenna has held up over many dozens of activations and in some really adverse conditions.

For this final activation of the weekend, 15 contacts was enough, including two Park-to-Park QSOs, K7EVM at Capitol State Forest K-5567 and KH6RF at Kaloko-Honokohau NHP K-0739 on the Big Island of Hawaii.

One thought on “Matt’s Weekend POTA Roundup!”

  1. Similar issues with my QCX-minis. However, a simple choke with a Ft140-43 toroid with RG316 works great—no more RF problems and it fits in my bag.

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