Search found 9 matches

by TM205
Thu Mar 24, 2022 3:50 pm
Forum: Antennas
Topic: 446MHz Quad Loop yagi design
Replies: 1
Views: 408

446MHz Quad Loop yagi design

Here is a design for a 446MHz quadloop yagi. Hopefully you should be able to build it from the info in the images shown. You can use 1mm or 2mm copper wire for the elements The boom can be 1/2" or 12.5mm copper pipe. Most braze the elements but you can also solder with silver solder. Either way...
by TM205
Fri Feb 18, 2022 1:26 am
Forum: Antennas
Topic: 1/4 wave ground plane antenna
Replies: 0
Views: 374

1/4 wave ground plane antenna

Taken from M0UKD website calculator. :thumbsup:

Image
by TM205
Tue Feb 15, 2022 8:57 am
Forum: General Discussion
Topic: Hearing more DMR on 446.
Replies: 7
Views: 2005

Re: Hearing more DMR on 446.

Well Ive not heard any DMR in the Stoke-on-Trent area. Apart from all the commercial licenced stuff up on 450MHz band. 446 Analogue FM is very busy around here during the day, a lot of business use around the city. 3 different Motorcycle trainers as well as warehouses and some medical use. and ofcou...
by TM205
Sun Jan 23, 2022 3:38 pm
Forum: General Discussion
Topic: Managed to work in to Leicester this morning. Sunday 23rd Jan
Replies: 2
Views: 626

Re: Managed to work in to Leicester this morning. Sunday 23rd Jan

Well it was probably due to tropo enhancement, as from experience on 70cms and 2m the beacons quite regularly get enhanced in early hours of the day. then when daylight dawns they slowly drop down to normal levels as the day commences. So as Peter was the only signal on the band, it could of been ev...
by TM205
Sun Jan 23, 2022 9:00 am
Forum: General Discussion
Topic: Managed to work in to Leicester this morning. Sunday 23rd Jan
Replies: 2
Views: 626

Managed to work in to Leicester this morning. Sunday 23rd Jan

Well band was up this Morning I managed to copy Peter in Coalville Leicester, from my home location in Stoke on Trent. There was a lot of fading but we established a contact so well pleased. My location is quite low down so was great to make it to Leicester with 1W. OH I was using a 5/8 x 3 vertica...
by TM205
Sat Jan 22, 2022 4:22 pm
Forum: Antennas
Topic: 446MHz Slim Jim Antenna
Replies: 2
Views: 643

Re: 446MHz Slim Jim Antenna

Its fairly wide band down to 441.5MHz and up to 449Mhz Obviously that was using thin wire. If you use thicker diameter tubing the bandwidth with improve slightly. But it isnt really needed. The hardest bit was getting a good vswr match. Which I found a bit hit and miss until I found a break in my co...
by TM205
Sat Jan 22, 2022 12:55 pm
Forum: Antennas
Topic: 446MHz Slim Jim Antenna
Replies: 2
Views: 643

446MHz Slim Jim Antenna

Image

You can place it inside plastic waste pipe for outside mounting.


:thumbsup:
by TM205
Sat Dec 11, 2021 10:54 pm
Forum: General Discussion
Topic: Hearing more DMR on 446.
Replies: 7
Views: 2005

Re: Hearing more DMR on 446.

Thanks for the info, most appreciated.
I will have to program my radio up.
Cheers Mark :thumbsup:
by TM205
Thu Nov 18, 2021 7:10 pm
Forum: General Discussion
Topic: Hearing more DMR on 446.
Replies: 7
Views: 2005

Re: Hearing more DMR on 446.

So DMR446 is on the exact same frequencies as PMR446? And is it also licence exempt or not? As most DMR radios are higher power. So is DMR legal on 446 under licence exemption or do you need a private licence. If it is licence free I can see PMR446 being overrun with digital? Can anyone clarify the ...