Search found 26 matches
- Sun Jun 25, 2017 3:30 pm
- Forum: SDR Antennas
- Topic: Long Wire Antenna Performance Questions
- Replies: 7
- Views: 36925
Long Wire Antenna Performance Questions
Hoping someone can explain why this is happening, so that I may understand, learn, and make a better antenna. A few weeks ago I ran a 60 foot long wire antenna, 25 feet vertical and 35 feet sloping from the pole to a terminating point in the yard. The mast is ~18 feet of galvanized fence post - the ...
- Sun Jun 25, 2017 2:46 pm
- Forum: SDR Antennas
- Topic: RA0SMS Miniwhip bad performance on SDRPlay
- Replies: 36
- Views: 145552
Re: RA0SMS Miniwhip bad performance on SDRPlay
Thank you Heinrich.
- Sat Jun 24, 2017 10:24 pm
- Forum: SDR Antennas
- Topic: RA0SMS Miniwhip bad performance on SDRPlay
- Replies: 36
- Views: 145552
Re: RA0SMS Miniwhip bad performance on SDRPlay
Heinrich - thank you. I am in the US.
I have three power supplies.
and
All three are approximately the same.
To keep noise down, do you recommend wrapping through a toroid (if yes, which and how many turns)?
I have three power supplies.
and
All three are approximately the same.
To keep noise down, do you recommend wrapping through a toroid (if yes, which and how many turns)?
- Sat Jun 24, 2017 3:21 pm
- Forum: SDR Antennas
- Topic: RA0SMS Miniwhip bad performance on SDRPlay
- Replies: 36
- Views: 145552
Re: RA0SMS Miniwhip bad performance on SDRPlay
The ra0sms mini whip antenna requires a 12-15V 100-150ma power supply. Around the house, I have many power supplies that are labeled as 12-15V and 100-150ma but when measured, are nowhere near the printed output. All are over voltage and current. Not one was true to the label. Not one was under volt...
- Sat Jun 24, 2017 3:14 pm
- Forum: SDR Antennas
- Topic: Longwire antenna question
- Replies: 7
- Views: 29642
Re: Longwire antenna question
Paul - what are you using as a power supply for the ra0sms? Around the house, I have many power supplies that are labeled as 12-15V and 100-150ma but when measured, are nowhere near the printed output. All are over voltage and current. Not one was true to the label. Not one was under voltage or curr...
- Thu Jun 22, 2017 3:46 pm
- Forum: SDR Antennas
- Topic: Longwire antenna question
- Replies: 7
- Views: 29642
Re: Longwire antenna question
Paul - I too have the ra0sms antenna. It is producing noise everywhere in the HF region, so much so that it is entirely unusable. The mast is ~ 25 feet, the bottom 15 feet is metal and the top is PVC. The mast is portable and rests on concrete - there is no real ground. The ra0sms is mounted @ the t...