Messages

91

The RF Workbench / Re: Modulated 5W NS40

« on: September 03, 2016, 0033 UTC »

Redhat, the amp was a Rockford Punch 100a2 from late 90's.  Made in 'merica.  Not sure about the BTL or not.

Fred Smith, I made one of those mighty mites too. It worked. I made the transistor blow because I had a 20w amp in place of the LM386. And it kept sounding better and better as I turned the volume up on the amp until the transmitter quit working. 

92

The RF Workbench / Re: Modulated 5W NS40

« on: September 02, 2016, 2130 UTC »

Thanks for your knowledge Redhat.  I'll pass that along to Jerry, I was hoping to get some pointers here.  I see him from time to time.  Impedance, he was mentioning something about that.  Like he thought there was an impedance mismatch somewhere.  Say it was an impedance mismatch.  If the .mp3 player's impedance is too low, would it effect the modulation?  I was thinking that the amp getting killed has something to do with the low modulation. 

93

The RF Workbench / Modulated 5W NS40

« on: September 02, 2016, 2012 UTC »

I met a guy at a bar a few months ago and we were talking about the FM radio on the shelf. Anyway, it ends up he was a ham.  And at the time, he had a 5-10W transmitter that was meant for morse code, the NS40:

http://www.4sqrp.com/NS40.php

He mentioned that he modulated the NS40 transmitter using the schematic shown below.  He's been testing it on a dummy load using an .MP3 player with pre-recorded speeches of him giving his callsign and calling CQ.  He said he could get audio out.  Also the audio is copied better if its compressed and limited.  But he doesn't think its modulating very well and he wants to know why.  He told a sad story of how his favorite car audio amplifier was destroyed.  It was a 100w amp.  He used an .MP3 player as input and he kept turning up the amp's output that went into the transmitter.  Eventually he was getting good power out as shown by the swing on the tuner's meter. But the amp got hot and died.  Any idea what might be the problemo?

94

European Pirates and Private Stations / Unid 6240 AM, 2130utc, July 15, 2016

« on: July 16, 2016, 0651 UTC »

Im on an adventure in europe and last night i hooked my trusty portable to the heating pipes for an antenna. Fairly low man made noise. 

2130utc  i heard a song about a pirate station. Hard to make out. There were other songs in english but the operator wasnt in english. The weak signal was fading a little. 

95

North American Shortwave Pirate / Re: UNID, 6925 USB, 0349 UTC, 26 June 2016

« on: June 26, 2016, 0351 UTC »

I can tell its big band music, a bit over the noise level. 

96

North American Shortwave Pirate / KCPR 6875 usb, Jun 26, 2016

« on: June 26, 2016, 0204 UTC »

0200utc, S9, different tunes, currently a woman singing she knows what boys like. "boys like me."

97

North American Shortwave Pirate / RFW relay, 6875 AM, 0144 utc, July 19, 2016

« on: June 19, 2016, 0145 UTC »

0144utc Yup, I have some RFW on the SDR remote in Sedona, AZ.  S7.  Ladies singing now. Lots of interference.

98

North American Shortwave Pirate / Re: unID 6925 USB 0436z 6/11/16

« on: June 11, 2016, 0444 UTC »

Ah yas, yas yas yas.  I had it here S7 peaks with an S4 noise floor. It overpowered the lightning noise.  Big band music. Went off at 0442utc.

99

North American Shortwave Pirate / Re: Cold Country Canada 6969 LSB 0307 UTC June 5, 2016

« on: June 05, 2016, 0402 UTC »

Heard a little over here in CA when the sun set.  Very faint, I could tell it was music is all. But its a first for me with Cold Country Canada!

100

North American Shortwave Pirate / Re: WEAK Radio 6940 UTC 0240 UTC 21 May 2016

« on: May 21, 2016, 0246 UTC »

0245utc Hearing punk music here. very low noise floor. Weak is coming in about as good as XLR8 tonight in to 'fornia.

101

North American Shortwave Pirate / Re: XLR8 6955 USB 0000 UTC 21 May 2016

« on: May 21, 2016, 0230 UTC »

0229 utc.  AAAAAaaaaaaaaaawwww yeeeeeeeeeeeeaaaaahh. I can hear it. Punk type music going now. Stick it to the man, XLR8.

102

North American Shortwave Pirate / Re: The Crystal Ship 6876 AM 0033 UTC 5/21/16

« on: May 21, 2016, 0202 UTC »

0200utc, I've been getting low audio for about 20min now. Quiet background conditions allow me to hear faint music with quick fade ups now and then.

103

North American Shortwave Pirate / Re: Radio Free Whatever 6965 USB 0039 UTC 16 May 2016

« on: May 16, 2016, 0146 UTC »

Sun is fairly high, S5 signal with S3-4 noise level.
0144utc Rage against the machine. Raging in here. Lightning interferes with the audio. I just heard its a short show. OK, he just said goodbye.

104

North American Shortwave Pirate / Re: XLR8 on 6930 USB @ 0228 APR 22

« on: April 22, 2016, 0327 UTC »

Yup, I heard you XLR8. And I heard your ID at the end of your music.  I don't know the former artist, formerly known as Prince's music.  But if I were to venture a guess, I would say, thats what was playing. 

Reception was weak and fair.  Reception was better on my big vertical loop than on my wimpy grounded random wire.

105

North American Shortwave Pirate / Re: XLR8 6930 USB 0115 UTC 21 Apr 2016

« on: April 21, 2016, 0218 UTC »

Mostly the deep notes are making it through the noise of the crashing lightning bolts.  




Edit:  Hey XLR8, have you ever heard Gemini Robot by Bird Creek?  Me likey.