Friday, 23 May 2014

Wire

Moved the end of my wire antenna today and shortened it a bit, still resonant at 8MHz. Untied it from old washing line post and moved to a fence post as the old post has metal bar in it (old post in photo).
Expected a bigger shift in frequency, maybe something else nearby affecting it.
Might be about 2db better on 20m locally now.

Wednesday, 21 May 2014

Grounding Tuner

Wire antenna with no tuner or ground connection (analyser connected to nothing but the coax).
There are 3 resonant frequencies, the antenna is probably behaving like an end fed half wave.

Same wire antenna with the tuner in bypass mode and the case of the tuner connected to metal heating pipe. Tuner also connected to its 13.8V PSU.

Totally different, there are still some dips in the SWR at around 8 and 16MHz.

Saturday, 17 May 2014

50MHz

Tried some 50MHz WSPR today and got 2 way reports with OZ7IT in Denmark. That was with the GP15 vertical. Couldn't hear anything else on the band.

A new SOTA chaser unique for me, and on 70cm! Cairnsmore Of Fleet in South West Scotland (GM/SS-065). That's the first new chaser summit for nearly 2 years.

Thursday, 15 May 2014

Dummy Load

7MHz WSPR using a dummy load.
I was having problems with transmitting on 7MHz, the Flex1500 would crash and keep transmitting a low power carrier, even after the PC lost contact with the radio. I think it could be RF getting back into it so I'm trying it into a dummy load.
I'm picking up a few stations on the dummy load (or through the power cable etc.)
After running into the dummy load for a while I received some more stations but no reports on transmit! A wire between the earth terminal of my tuner and the copper central heating pipe seems to have stopped the RF getting back into the FT1500 on 7MHz. It has stopped the PC mouse from going crazy when transmitting on 3.5MHz.


Monday, 12 May 2014

FT1500M

My Yaesu FT1500M (single band 2 metre mobile) which has sat in a drawer for rather a long time. Used it a few times for SOTA activations as after only paying £20 for it, I wouldn't be too bothered if it broke.
The 'aftermarket' power cable came with it and I never got round to picking off the 50 layers of tape joining it together.

There seem to be some screws missing from the case and the RJ11 connector for the microphone has got stuck in after the springy bit snapped off.

Not quite as sensitive as the Icom IC-2800 above 160MHz. 

Thursday, 8 May 2014

XXX Rated Microphone

Does your £250 Heil microphone do this?

The perfect addition to your shack when your regular 80 metre net is starting to get a bit dull.