Posts Tagged ‘InnovAntennas’
|The antenna this morning
I should say my brother has took his foundation exam and has the callsign M6GTD, so am expecting him to ask for his antenna back at some stage! ;-)
This evening is this months 144MHz UKAC contest and I spent yesterday evening getting the antenna set up properly so I could take part. Unfortunately the antenna was damaged just before Christmas and I have now replaced the boom insulators and straightened the bent director element.
It took a while to get the antenna VSWR down to a satisfactory level, not due to any fault but simply I had the adjustable sections of the active element loop too far out. They are now almost fully in, but at 144MHz the VSWR is a little over 1:1 and across the entire 144-146MHz the maximum is around 1.3:1 so I am hoping it preforms reasonably well, even with 10m of RG-58.
As suggested I have a 'ugly' rf-choke inline, which you can see on the photo. The antenna is clamped just under the vertical collinear, and hopefully this won't affect its performance.
I can put the pole up to around 5m, but the top section isn't that substantial and has a reasonable loading with the yagi and the collinear on it, but the pole it is securely guyed so for temporary use should be okay. Well that is what I thought till I saw the weather forecast
The wind speed and gusts look a little worrying, peaking at around 40mph between 21:00 - 00:00!
The only saving grace is that I will be manually rotating the antenna I will be out checking on it regularly during the contest!
Best of luck everyone taking part...
I am a partner in InnovAntennas, a company which designs and manufactures high performance antennas and accessories for the amateur, commercial, military, government, NGO and other markets. Stay in touch with our latest products and news by signing up to our mailing list. Select the link on right hand side of this page to go to the sign up page. Lots of new products on tap for 2013 – hear about them first here!