G8TTI's Scrapbook

Wednesday 15 July 2015

Two Metre Interference

Two Metre Interference: has anyone been experiencing QRM on two during the day recently. This horrible hash has been appearing on the band here. At first I thought it must be local to me but then I notced aircraft flutter indicating its was coming from someway off. So turned on rig in the van and could hear in all the way to Chippenham. Anyone else hear it?

"Large spike on right is packet, left spike is GB3VHF"

Thursday 5 February 2015

144MHz 300 Watt amplifier

Been busy making this amplifier recently.
Amp kit from the Dutch RF shop and uses the Freescale MRFE6VP6300 mosfet.
Low pass filter from Homebrew RadCom.
Relay sequencing.
VSWR protection.

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.

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Wednesday 15 July 2015

Two Metre Interference

Thursday 5 February 2015

144MHz 300 Watt amplifier