Vin G4JTR's top band net on Thursday 30th October at 8pm + zoom info

John Gumb

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Oct 26, 2025, 8:37:03 AM (4 days ago) Oct 26

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Folks,

From Vin G4JTR, many thanks! Zoom info at end. Even if you are not on the top band net, you are most welcome to join the zoom session for a natter.

"There will be the (almost) Hallowe'en top band net on Thursday eve. 30th October starting at 20.00hours. There will also be a zoom chat session.

I have been asked to co-ordinate this by John, G4RDC and I’m happy to do this.

I understand that not many members will have this capability at the moment but here is an opportunity to see how well you can lash up a system for local contacts. I suggest the following simple approach.

Antennas.

We are not looking for NVIS ionospheric propagation, what is needed for a local net of stations a few Km apart, I think, is local ground wave propagation. This means having some component of radiation with vertical polarisation from the antenna. An inverted L is ideal. It can be non-resonant and shorter than a 1/4 wave, provided your ATU will resonate it. The ATU can be at the feed point if you use a remote auto ATU, or in the shack, where the coax feeder will act as a crude counterpoise. An additional wire counterpoise at the feed point may probably help but not necessarily.

Strapped feeders on a doublet is good. A short loaded vertical resonated on top band, if you already have, one will work.

If you run a full sized antenna for more serious Top Band work, I expect it will be fine for local contacts.

Power Level.

I am proposing a net frequency of 1850KHz LSB or just below in the high power all mode section of 1840 to 1850KHz. The lowest dial reading we can use on LSB is 1843KHz. This means we can use in excess of 32W but I will probably limit my power to 50W. Your power may be limited by “RF in the shack” issues.

So, in summary, I will call on 1850KHz at 20.00 on the 30th. Or on the best frequency clear of QRN just below and co-ordinate the net as Net Controller and pass it round according to the list of callers.

Best of Luck,

Vin, G4JTR."

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John Gumb

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Oct 29, 2025, 6:14:05 AM (yesterday) Oct 29

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Top band net tomorrow...thanks Vin!

73

John

G4RDC

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