Search found 85 matches

by G0DJA
Sat May 07, 2022 5:39 pm
Forum: VHF/UHF Radio
Topic: Coax Antenna
Replies: 11
Views: 3455

Re: Coax Antenna

Good to have you back Dave what have you been up to. Sorry for the delay in replying, over a year! I didn't do much radio for a few years and I passed my motorcycle licence, so I spent time on that until Covid hit. Lately I've been using 6M, 4M, 2M, 70cm and 23cm, I've also recently started monitor...
by G0DJA
Tue Mar 09, 2021 5:36 pm
Forum: CW and Weak Signal Data Modes
Topic: MGM on 23cm
Replies: 3
Views: 3739

Re: MGM on 23cm

Hi Rob, Sorry for the delay in replying, I sort of lost track of this forum! At the time I was using a TS2000X and a Wimo "44" element Yagi. Wimo count each rod in the reflector as an additional element, so I call it a 37 element as I only count the reflector as one. I still have, and use ...
by G0DJA
Tue Mar 09, 2021 5:22 pm
Forum: Digital Radio
Topic: Icom 9700 DSTAR Help
Replies: 8
Views: 5201

Re: Icom 9700 DSTAR Help

I've recently bought an IC-9700 and tried to get my head around using it on D-Star. I have the latest file with all the VHF and UHF D-Star repeaters and access nodes but have yet to get reliable access to any. A local did help me by going to the DV calling frequency on 144.6125MHz and we made a D-St...
by G0DJA
Tue Mar 09, 2021 5:05 pm
Forum: VHF/UHF Radio
Topic: Coax Antenna
Replies: 11
Views: 3455

Re: Coax Antenna

I realize that this might be a bit late in the discussion, but before you put up a coaxial cable antenna, you might want to read this article written by the late Steve Hunt (G3TXQ) on tests that he did with these antennas. In fact, the website is worth going through as it contains a lot of useful in...
by G0DJA
Tue Mar 09, 2021 4:52 pm
Forum: Microwave Radio
Topic: Anyone want a 3cm transverter?
Replies: 2
Views: 3169

Re: Anyone want a 3cm transverter?

Sorry that I didn't reply. I didn't log back onto this forum for a while.

The 3cm transverter and 150W SSPA, plus a few other bits and pieces have been sold.
by G0DJA
Tue Mar 09, 2021 4:46 pm
Forum: VHF/UHF Radio
Topic: GB3VHF news
Replies: 1
Views: 1178

Re: GB3VHF news

I've not been on the forum for a while, so still catching up. Over the years I've used GB3VHF and GB3UHF as ways of checking in antennas/radios are working and for propagation enhancement warnings. The two beacons have served me well for these jobs on 2M and 70cm. I use GB3MHZ for similar tests on 2...
by G0DJA
Sat Jan 04, 2020 1:07 pm
Forum: VHF/UHF Radio
Topic: Silly question
Replies: 12
Views: 6722

Re: Silly question

RG213 is reasonable on 144MHz, loss per 100 metres about 6.9dB, so your run of 12m means a loss of about 0.828dB. So, if you put 10 watts in at the bottom, you should get 8.26 Watts out at the top. Assuming a good match to the antenna, and I don't just mean what you read on a typical Amateur Radio V...
by G0DJA
Sat Jan 04, 2020 12:05 pm
Forum: VHF/UHF Radio
Topic: FT8 2 metre record
Replies: 4
Views: 2532

Re: FT8 2 metre record

That'll be good news. When he gets confirmation get him to send it to RSGB to update the records.

Unless there has been another claim since that was published on 3rd January 2020, he's in with a shout of the record.
by G0DJA
Sat Jan 04, 2020 12:04 pm
Forum: VHF/UHF Radio
Topic: Silly question
Replies: 12
Views: 6722

Re: Silly question

My money is on faulty coax, the reason behind my theory is power. lets say you have one or several micro-fractures in the coaxial cable, on RX this is significant why? Because there isn't enough voltage to breakdown the air in the micro-fractures, however on TX lets say you're sticking 100W into an...
by G0DJA
Sat Jan 04, 2020 11:46 am
Forum: VHF/UHF Radio
Topic: FT8 2 metre record
Replies: 4
Views: 2532

Re: FT8 2 metre record