Search found 186 matches

by JEL
Wed Jun 17, 2020 9:13 am
Forum: User Projects
Topic: SDRangel Alien Radio Signals
Replies: 1
Views: 2615

Re: SDRangel Alien Radio Signals

Hehe, nice :)

If anybody want to create a reply to said aliens, here's an old windows-software that can be helpful (Still-images only though, but free :) )

https://www.abc.se/~re/Coagula/Coagula.html
by JEL
Wed Jun 17, 2020 2:06 am
Forum: Signal Identification Help
Topic: Is this interference i see at 137MHz?
Replies: 23
Views: 9944

Re: Is this interference i see at 137MHz?

Through time and experiments I have found that sometimes even small changes (Especially to antenna placement, but also to antenna-cable placement) can make a huge difference, so experimentation is key :) I once had some issues with an antenna-cable that I had laid on the floor up against a wall, and...
by JEL
Mon Jun 15, 2020 10:38 pm
Forum: Signal Identification Help
Topic: Looping tones on 3828 kHz (HF airband)
Replies: 0
Views: 1402

Looping tones on 3828 kHz (HF airband)

EDIT: Solved! It is the Russian "The Squeaky Wheel" Original message below: ///////// These tones have been looping for several hours now on 3828 kHz (HF airband) : They appear to be mostly frequency-stable, but, as you can also see in the video, they occasionally wobble somewhat. Any ideas to what ...
by JEL
Mon Jun 15, 2020 10:34 pm
Forum: Signal Identification Help
Topic: Is this interference i see at 137MHz?
Replies: 23
Views: 9944

Re: Is this interference i see at 137MHz?

When I used a powered USB-cable it flooded the receiver with noise which looked exactly like your images. If you can; maybe try to re-arrange the cable-layout or see if you can use an un-powered extension between the powered cable and the receiver-dongle. Anything you can do to create some distance ...
by JEL
Mon Jun 15, 2020 10:23 pm
Forum: Antennas
Topic: Static shock while connecting ground-wire to radio?
Replies: 14
Views: 15538

Re: Static shock while connecting ground-wire to radio?

I would recommend you purchase a PolyPhaser (this is a brand name) Thanks for the suggestion and sorry for the late reply :) I have been running the galvanic isolator now for some time and it appears to kill everything below about 5 kHz. I also bought a 'lightning-protector', which is advertised as...
by JEL
Thu Mar 05, 2020 4:15 am
Forum: Antennas
Topic: Static shock while connecting ground-wire to radio?
Replies: 14
Views: 15538

Re: Static shock while connecting ground-wire to radio?

Thanks Hotpaw2 :) I already have a ground-wire permanently connected to the shield of the antenna (And since it's a loop-antenna thus also automatically to the lead wire) But I have ordered a galvanic isolator and also a surge-protector, which are to sit on the cable near the radio, so I'm currently...
by JEL
Tue Mar 03, 2020 4:11 pm
Forum: Antennas
Topic: Static shock while connecting ground-wire to radio?
Replies: 14
Views: 15538

Re: Static shock while connecting ground-wire to radio?

Thank you very much Bruce :) I will order the commercial one, just to be on the safe side (Being in Europe and not near any shops with personnel having expertise in this area of all things amature-radio, I would not feel too sure I was doing things correctly if I attempted to build it myself) Anyway...
by JEL
Tue Mar 03, 2020 2:16 am
Forum: Antennas
Topic: Static shock while connecting ground-wire to radio?
Replies: 14
Views: 15538

Re: Static electricity built up over time

I guess you are experiencing static electricity built up over time. If you have a coax cable then the capacity, wich will vary with cable type and length, the static electricity will accumulate over time. Did you have a thunderstorm building up in your area when you experienced this? The static ele...
by JEL
Mon Mar 02, 2020 8:40 pm
Forum: Antennas
Topic: Static shock while connecting ground-wire to radio?
Replies: 14
Views: 15538

Re: Static shock while connecting ground-wire to radio?

Short update; I just measured the antenna-plug and get voltages up to about 0.2 VAC and no detectable Amperes. The multi-meter also has a light that lights up when held near a power-line (Used to search for power-cables hidden in walls and such. The normal ones for regular house-appliances and such....
by JEL
Mon Mar 02, 2020 7:38 pm
Forum: Antennas
Topic: Static shock while connecting ground-wire to radio?
Replies: 14
Views: 15538

Re: Static shock while connecting ground-wire to radio?

Do a Google search and you'll find directions on how to make it and connect it between your antenna and the receiver. 73, Bruce, VE3EAR Would something like this commercial product make sense (As an amature I think a DIY on this occasion may not be the best option. Not so much the building, but rat...