G8TTI's Scrapbook

Thursday 30 November 2017

Some photos uploaded from my mobile phone and stuck here because it's a scrapbook.

The Shack

Some QSL cards for Two Metre contacts

The old locator system and some squares worked in the early 80s

My elevation indicator!

Six & Four transceiver

An EME contact

Thursday 5 October 2017

I've changed the driven element of my DK7ZB to the DG7YBN (K6STI) style. This has the advantage of a 50 ohm direct feed eleminating the need for the 50-28 Ohm DK7ZB match. I've had problems water proofing the old match and not been able to source decent 75 Ohm coax anyway.
VSWR is very low and as far as I'm able to tell there is no loss of gain. Proof of the pudding will be in the eating. EME contest this weekend so if I can make a few contacts I'll be happy if not I might have to reinstall the old DE.

The DG7YBN driven element

Update 15th October 2017

First EME contact with the new driven element

And it seems to work

Revieved this nice comment from Hartmut

On 01/11/2017 23:07, Blogger Contact Form wrote:

Nice modification on the 2 m Yagi there!
A number of low impedance Yagi are suitable of having a bent driven
element replacing mathcing devices like a T-Match or parallel coaxes.
And this also works out in the NEC model.

Well done.
73 de DG7YBN

Here's a link to Hartmut's website
DG7YBN - Low Noise Yagis

Amateur Radio

Amateur radio, commonly called “ham radio”, is a hobby enjoyed by many people throughout the world; about 3 million worldwide, 70,000 in Germany, 60,000 in the UK, 5,000 in Norway, 57,000 in Canada, and 700,000 in the USA.
A holder of an Amateur Radio license has studied and passed required tests in his or her country and been issued a call sign by its government. This call sign is unique to the operator and is often a source of pride. The holder of a call sign uses it on the air to legally identify all voice and data communications.
Amateur Radio should not be confused with CB radio which is limited to voice operation, allowed lower power limits, fewer frequency allocations, and is unlicensed in most countries.