Welcome to my blog for electronics and amateur radio.

Category: Announcement (Page 1 of 2)

Masks

With the pandemic coming, and knowing the effectiveness and importance of masks, I got busy making top quality re-usable ones around the end of March. These are made from top quality fabrics and offered in a standard 2-layer version and high-performance 3-layer masks. They are available for purchase here:

https://www.ebay.com/itm/254577982386

After numerous experiments, I determined that pure cotton muslin is the most comfortable inner liner and this is used on all my masks. Attractive outer designs of high density cotton are available in various styles. Ear bands are comfortable 1/4-inch elastic. All materials are pre-shrunk.

Masks are equipped with a 6-inch wide padded annealed copper nose wire to conform the mask to the shape of your nose and face. This stops leakage and fogging of eyeglasses, and improves filtration effectiveness.

High-performance masks include a third inner layer that serves as an electrostatic filter. These masks deliver 97 to 98 percent filtration efficiency on particles as small as 10 nanometers.

The science behind it and test results are published by the American Chemical Society here:

https://pubs.acs.org/doi/full/10.1021/acsnano.0c03252

There are about 30 designs and more are added to the eBay listing every few days. The most recent additions are hand-sewn Italian, Guatemalan, and Pan-African masks.

Please take a look.

Getting Back on the Air Soon

Hello everyone. So, what have I been up to for most of 2019? No posts here because I’ve not been doing much ham radio besides working on ideas and designs. The short story is I’ve been working at cleaning up the mess from a rather disastrous 2018. And, much of the mess still remains.

The good news is that for the past couple months I’ve been finding some time here and there to work on ham radio pursuits. I’m also doing one of the best things for getting back into the hobby, and that’s “Elmering”. I’ve become friends with a new ham, KE8NBP, Jason, who recently passed his General. Yay, Jason! Jason’s father was a ham, so he already had a pretty good idea of what the hobby is about. Besides teaching him some basic physics, electricity, and stuff about transmission lines, antennas, and so forth, we’ve been talking about Field Day. We’re working towards putting together a 2B operation in some remote spot here in West Virginia. That would be fun.

Unfortunately, I left my entire ham station in storage in Montana, so I have to rebuild from scratch. But that’s something I’ve done a half dozen times now, so I’m experienced at it.

Jason and I are also considering doing additional portable operations, not just on Field Day. I mean, if we build a 2B Field Day setup, why not use it as much as possible? The main reason for this thinking is that Clarksburg, WV is an old Rust Belt town, falling apart, including the electric power distribution system. The electrical noise is the worst I’ve ever seen anywhere. Cracked insulators, arcing connections, and kudzu growing up power poles and sizzling on the wires are common. The last time I operated HF here, power line noise was never less than +10 dB over S9. Digital modes like PSK can manage to some degree with noise like that so that’s what I used. Since then, it’s gotten worse. Jason lives about two miles from me and has a terrible situation because 375 kV marching giants cross directly over his home. He can’t hear anything on HF with a +30 over noise level.

The only solution is some portable operations where it’s quieter. Maybe we could activate some rare counties and so forth.

Anyway, that’s the news from KW2P. More to follow as progress is made.

On the Air, Finally

After a long hiatus, I’m back on the air. QTH: Clarksburg, West Virginia, Harrison County, locator EM99tg. Primary mode is digital. Antenna is a 40 meter vertically oriented triangular loop, which gives good performance on 40, 20, 15, and 10 meters.

The Rig

I’m also working with my daughter, KC7BNH, in Coeur d’Alene, Idaho, to help get her back on the air as well.

Up and Running in Guatemala

After an interruption in ham radio activities and blog entries, I am back on the air, more or less. The interruption was due to several months of planning and executing a move to Guatemala and then getting settled here in my new digs and setting up a basic radio shack. At the moment I am only using a 26 foot vertical wire supported by a tree so my signal is not very good but I’m out there on PSK and Hellschreiber. You can usually find me evening and nights from 7070 to 7074, signing TG9/KW2P. Give me a call.

Once I collect the materials I plan to put up a 270 foot vertical loop. I have some tall trees here that will support a vertically oriented 80m full wave loop. I’ve had both vertical and horizontal loops of that size and they worked great so I expect good results, especially in the tropics where QRN can be a problem. The loop should improve things drastically but getting the materials down here takes some doing.

73 de Phil, TG9/KW2P

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