Introduction to DMR talk.

Tiago was due to talk to the club about his adventures in DMR and give the first of two talks introducing DMR. The first has been postponed from the 3rd of November to a date to be decided, apologies for any inconvenience. 

Hopefully we can see everyone on the new evening.

Field Day 28th 29th 30th August 2021 Preparations are under way

Today John m3eqq and Rebecca  and myself M0hfh put the club antenna 10m in the air slung between two trees on nylon rope. We are using an 80m rectangular loop this year courtesy of Garry g7nvz having ratios of  L1 (30m) to L2 (10m) total length one wavelength (80m) which has a theoretical gain of 4db compared to a dipole. We will be using the Yaesu 450d  with the club manual ATU; Generators should give the full 100w output.

The Field Day site is at GL13 9TH hook street, field located behind Hook House 51°41’44.0″N 2°28’16.7″W 

What 3 words location thuds.breathing.whistle

First class honours for Peter Barnes

Peter Barnes (@pe5er) tweeted at 2:25 pm on Fri, Jul 16, 2021:
Thrilled to receive a First Class Honours degree in Electrical and Electronic Engineering at @SwanseaUni . Huge thanks to the EEE department, support services, friends and family who have all helped me through the last few years. Next step: RF Masters! https://t.co/iOZzyNCZzN
(https://twitter.com/pe5er/status/1416026319855538178?s=03

 

John Rowden M0hfh (@johnrowden59) tweeted at 10:28 am on Thu, Aug 12, 2021:
Well done Peter, we always knew you were clever, and that was before your degree, keep going we will be proud to have Dr. Peter Barnes in Tsgarc. Best wishes from all at club in Thornbury.
(https://twitter.com/johnrowden59/status/1425751055682478084?s=03

 

 

TSGARC Resumes in person meetings!

From Wednesday 21st of July the club will be resuming in person meetings at the Chantry BS35 1HB at our usual time of 19:30.

The first one will be a general natter and catch up night. 

We are looking for weekly subs to be cashless (£3.50 per week), all members should have received an email from John the treasurer with details. Also annual membership fees if not already paid are due now.

The committees current feeling is that face coverings should be worn when moving around the building but ok to remove while stationary, with appropriate social distancing. 

In person club nights

The provisional return to meeting in person at the club is currently 21st of July 2021. This all will all be dependant  on covid restrictions in place at the time. Further information to follow when known. 

Until the then the club will still be holding the regular 2m net on a Friday evening. Also the daily check-in net on the local 70cm repeater GB3ZB each morning.

TSGARC Field Day

Today up at the Ridge some members assembled for the first field day since the start of lockdown. An enjoyable time was had however the Wind, Snow and temperature limited operations. All of the new members (Tiago, Phil and Clive) came along to see what it’s all about. Contacts were limited to Europe only.

Pictured (from left to right) are Clive SWL, Paul M0ZMB, Ron M6EAT, Tiago 2E0GJV (M0 soon) and Owen 2W0YOX.

Paul (M0ZMB)

Antenna Handbook 1937

Has anything changed in the maths since 1937?

Well perhaps the way we calculate and the calculators and computers we use to get the answer. Our test equipment and radio’s have also taken a great leap forward; I have smiths charts on my analyser these days where it used to be complicated and time consuming to get the resolution to complex number problems.

The link below takes you to Frank Jones antenna handbook

http://www.tubebooks.org/Books/Jonesant.pdf

Still valid today? – leave a reply 

I like to try some of the old designs and compare  the performance with some of the improved antenna designs we have today,( Roll on Field day 2021)  but mostly its the detail of the design description that leads to ideas for improvements. 

John (m0hfh)