Search found 7 matches

by TomLine
Wed Aug 28, 2019 8:50 pm
Forum: Troubleshooting Help
Topic: Spikes on HF frequency
Replies: 8
Views: 1957

Re: Spikes on HF frequency

I had a monster spike at 28 or 29 Mhz. Started unplugging everything in the house. It was a cheap 10/100 data repeater under my desk humming like crazy! Not sure if it was the power supply, the repeater itself, or the cat5 cables. It was REALLY putting out the noise. But power cycling things around ...
by TomLine
Tue Aug 20, 2019 2:47 pm
Forum: Antennas
Topic: Yagi Antenna for "death" Spot?
Replies: 4
Views: 3771

Re: Yagi Antenna for "death" Spot?

What frequency is the signal? A tight yagi could maybe pickup a high freq signal bouncing off something else? A lower freq signal maybe a higher antenna or different polarization, filtering, amplification, etc.
by TomLine
Tue Aug 20, 2019 2:44 pm
Forum: Antennas
Topic: Adjustable Matching Transformer Exist ??
Replies: 4
Views: 990

Adjustable Matching Transformer Exist ??

Is there such a thing as a variable matching transformer. Just hook it up and adjust for best signal? Is an Antenna Tuner the same thing?
by TomLine
Tue Aug 20, 2019 2:38 pm
Forum: Antennas
Topic: Antenna for encrypted scanner frequencies
Replies: 5
Views: 1292

Re: Antenna for encrypted scanner frequencies

Probably encoded, but not necessarily encrypted. Pipe the signal to DSDplus. Newest systems are P25, which has a big powerful control channel that's hot all the time, and then voice traffic will pop up on either side of that frequency when they talk station to car etc. If you pipe DMR or D-STAR ham ...
by TomLine
Tue Aug 20, 2019 12:27 pm
Forum: Antennas
Topic: Antenna Element Wire Gauge Effect
Replies: 4
Views: 1049

Antenna Element Wire Gauge Effect

Have some 24? gauge telephone wire. Wonder how much difference the gauge of the wire makes if I were to pull a long antenna wire in my attic for low freq, or maybe something shorter. I keep getting some "ghost signals" I call them. Just to one side of a signal, is like a slightly smaller power image...
by TomLine
Tue Aug 20, 2019 12:22 pm
Forum: Off-Topic
Topic: CB Superbowl 11 Meters 27 MHz
Replies: 1
Views: 787

CB Superbowl 11 Meters 27 MHz

Anybody listen to these wild men on US 11 Meters 27 MHz old CB band? (Ch 6 mostly) What makes these guys tick? In Ohio I was picking up a guy transmitting from Dade County Florida. How much is this is just illegal unlicensed power, and how much is atmospheric ducting ?? Picked up a CB at a yard sale...
by TomLine
Tue Aug 20, 2019 12:17 pm
Forum: Off-Topic
Topic: Theoretical radio course
Replies: 2
Views: 884

Re: Theoretical radio course

Get the AARL study book for technician license and take the online practice exams. It's a quick immersion and very practical.