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.