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Messages - Brian

Pages: 1 2 3 4 5 6 7 8 [9] 10 11 12 13 14 15 16 17 ... 35
121
European Pirates and Private Stations / Re: Unid 5200 AM 0550 utc 11 Aug 2020
« on: August 11, 2020, 1930 UTC »
1927 Music. 80's pop?
Weak but very audible.
1950 Michael Franks, I think.

122
European Pirates and Private Stations / Re: Radio Rock Revolution 5795 AM 1536 utc 11 Aug 2020
« on: August 11, 2020, 1927 UTC »
1915 trace of music. Too weak to ID then gone.

123
European Pirates and Private Stations / Re: Radio Voyager 6950 AM 1918 utc 09 Aug 2020
« on: August 09, 2020, 2003 UTC »
Not really moving the s meter but clear audio here.

124
Equipment / Re: Would this dual antenna design work?
« on: August 04, 2020, 1814 UTC »
That will be fine on SW but on MW (Txing), the SW feedline running close to the tower may cause an issue with tuning.

125
European Pirates and Private Stations / Re: Radio Merlin Int. 6305 off the air 29 Jul 2020
« on: July 31, 2020, 2100 UTC »
Quote from: Jock Wilson on July 31, 2020, 2048 UTC
Brain
if you took time to read what i said i didn't say we were closed down our link to the tx got closed down our aerial was down our web site got closed down fact .I t was nothing to do with short wave I said we will be off air for a break as we didn't know what was going on .our aerial is now back up.We went off air for security reason ,and no link to our tx

stated Paul Watt.


One thing we can all agree on is that Brian is Brain(y)

Very good Jock. I didn't cop that  :D

126
European Pirates and Private Stations / Re: Harmony 5780 AM 1909 utc 31 Jul 2020
« on: July 31, 2020, 1938 UTC »
Very wide 12 Khz audio today

127
European Pirates and Private Stations / Re: Radio Merlin Int. 6305 off the air 29 Jul 2020
« on: July 31, 2020, 1201 UTC »
Quote from: The Ether Hacker on July 31, 2020, 1119 UTC
Sounds like Ofcom had nothing to do with it, this time.

It's just a load of attention seeking drama. He's been posting on every message board about being closed down.

Nothing to see here!

128
Equipment / Re: DRM pirates
« on: July 24, 2020, 1542 UTC »
I used the DReaM software to generate DRM about 16 or 17 years ago. I had to modify my high level audio MW transmitter in some way to take the coded signal. Can't recall exactly what I had to do but there were 2 outputs from the PC. One output went into the normal audio input on the TX and the other went to a small circuit that I had to put in the output of the PLL oscillator.
I don't think the mod is needed on modern transmitters though.

It worked.............sort of.  Not having a portable DRM radio was not ideal for field tests but I was able to decode it on another PC in the house with a modified radio.

129
Equipment / Re: 20mb and 10/11mb folded dipole antennas
« on: July 16, 2020, 1558 UTC »
Just going by my experience of folded dipoles on band 2 VHF, I would say that the bandwidth is considerably better. I've been toying with the idea of making one for HF transmission but I'm not sure if I can build one to handle the power I would be using.

130
European Pirates and Private Stations / Radio Sovereign 3905 AM 2040 utc 13 Jul 2020
« on: July 13, 2020, 2041 UTC »
Sovereign @ 2040 moved from 3910.

edit by Ray : wiping the mess between 5805 and 3905

131
European Pirates and Private Stations / Re: Radio Sovereign 3910 AM 1914 utc 13 Jul 2020
« on: July 13, 2020, 2025 UTC »
Co channel beating with another station

132
Equipment / Re: Higher highs and lower lows on MW TX antenna
« on: July 13, 2020, 1238 UTC »
Too little information.
Are you comparing SW with MW?

133
Equipment / Re: Garbage Baluns
« on: July 06, 2020, 1850 UTC »
Looks like the same design as an old aerial I used to use made by Diamond. A BU-50.
It worked pretty well but then again, it's quite easy to match a valve transmitter to almost anything.

134
The RF Workbench / Re: Cross Modulation Problem with Active Antenna?
« on: July 05, 2020, 1233 UTC »
Quote from: alpard on July 04, 2020, 0901 UTC

I read about the active antenna again, and it says that the antenna must be powered by some sort of linear Power Supply. But all my power supply is switching mode psu, and that might cause excess noise and intermodulation?  I will try to get a 12V rechargeable battery from the shed, and will try with that to see if the situation will improve.

Shouldn't have to say this but get rid of the SMPSU asap!

135
European Pirates and Private Stations / Re: Radio Nova (UK) 6930 AM 1631 utc 02 Jul 2020
« on: July 02, 2020, 2046 UTC »
Quote from: Ray Lalleu on July 02, 2020, 1642 UTC
Quote from: Normz on July 02, 2020, 1637 UTC
Hi Ray
finally got my 1/4 wave vertical running, 100 watts carrier off one of stretchy's Xmitter's using pwm with stereo tool looking after the audio processing

Good signal at this time, but storms are rising.
'stereo' : really ? what system ?

Stereo Tool is the audio processing software. It doesn't mean the transmitter is in stereo.

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