Messages

31

Equipment / Re: Noise canceling systems

« on: August 27, 2014, 1353 UTC »

Good Day All !

I could get: Daiwa All Mode Active Filter AK606K , Datong FL1 and a Datong FL3, all in good condition!
All three in one 'packet' for 160 european coins

My Question,anybody get some experience with this stuff?

Good DX!

First off, I'll say that I've never touched those, but I do work for a DSP company. Won't say the name as I don't want to come off as trying to sell - Amateur radio isn't our market & I don't want to come off like that.

Having said that, DSP processing is much tighter than anything analog in terms of EQ's. I can create notch filters at 48db per active using IIR filters or even more with FIR. Tighter than a nun's.. um, well, you know. At *any* frequency that I want. Analog can be good in certain bands, but aren't really configurable & have good bandpass cutoffs. Our processors are made for live sound/studio applications, but I've been using mine on my HF rig as well for just that. On top of it, I also do all my mic processing (ALC, Compression & EQ (I have a crappy mic)) in the same box. I'm sure that something like this has been developed for Amateur radio as well. Just something to consider.

32

Equipment / Re: Audio Processing

« on: August 25, 2014, 2115 UTC »

Well, just listening to folks like Wolverine Radio & I'm just amazed that they get the audio (music) sounding as good as they do out of SSB. I do audio work myself & just wondered what processing they used for SSB. I understand the AM/FM requirements very well, just that SSB seems that it would require much more work to get it sounding good.

33

Equipment / Audio Processing

« on: August 20, 2014, 1528 UTC »

So, what sort of audio processing best for SSB broadcasting? I'm guessing 6Khz bandwidth (Or 10?) ALC & Compression?

34

General Radio Discussion / Re: My "Kinda" legal station

« on: August 08, 2014, 1648 UTC »

I was also told on another forum if I could have 2 transmitters synced at my house, and 2 transmitters synced at my brothers house, penetration into homes should be perfect.  So for the time being, my plan is to use this illegal transmitter when it arrives to get the 1 mile range into houses, using the minimum power needed to achieve this.  I'll cross my fingers that I don't get the "knock of doom", and buy 3 more legal transmitters in the next 3-6 months and try and get 2 synced on each property and see how it goes. 

Syncing the audio is one thing, to eliminate phase cancellation, but all the transmitter's carrier freq would need to be in phase as well. Without doing this, you'd just make a mess of your station, canceling your own signal out in parts & there being a terrible beat frequency oscillation at places where you can get it. You will get a 'knock of doom' doing this as it would just be a real mess of rf with no real signal intelligence.

Best bet is to go the carrier current route & stay legal, or just toss that to the wind & go with just a single transmitter.

35

The RF Workbench / Re: High Powered Pirates

« on: June 06, 2014, 1430 UTC »

I doubt you'd feel the RF from a 7 MHz TX at 10KW, unless you were right next to the antenna.  FM is a different story.  I've foolishly been within 3 feet or so of FM bays running 1KW on my parents roof.  You can definitely feel that, it feels like a burning sensation.  I also recall working on a few 50 KW AM's during which my knees and elbows would start to hurt after a while.

The power levels I play with these days, I don't feel a thing

+-RH

I had the opportunity to go up to the transmitter / combiner room of Toronto's CN Tower. It's got a whack of commercial FM & TV stations on it. In the combiner room, there is one section of coax that feeds the main antenna. Close too a million watts of VHF/UHF rf on it. You could feel a warm fuzz as you put your hand closer to it. Started about 2 foot away & got too strong at 1ft to go closer..

Stuck my head out of the 'roof' too. Wickedly neat.

36

General Radio Discussion / Re: mystery radio bursts messages from ALIENS?

« on: May 23, 2014, 1927 UTC »

Shhhhh, it's really the pleasure ships coming from Planet X for X-Day. Keep it quiet! Don't want the pinks to know...

OH boy oh boy... Now to listen to my most prized DEVO collection.... yea!!! 

And then I will listen to the FUGS...  great stuff... oh yeah and Frank Zappa...  skip Yoko please...

 

Egads... Yoko. Speaking of HF QRM indeed. The rest, great bands. Add to 'em though The Legendary Pink Dots, El Queso Allstars & The Amino Acids!

37

General Radio Discussion / Re: FCC news via Free Radio Weakly, Pirate Menace in NYC

« on: May 23, 2014, 1652 UTC »

I don't want to offend anyone but...  let's get real, pirate means to play something that no one else is playing right???  Seems the current crop of pirates play the same old same old...(AKA SOS)  IMHO

sorry if I have offended anyone...

73 Vince KA1IIC


Lol, agree with you. My playlist consisted of Hour of Slack, Puzzling Evidence & anything else I can scrape off my vinyl collection. That was on FM. Now, with an HF setup, I'm debating..<g>

38

General Radio Discussion / Re: mystery radio bursts messages from ALIENS?

« on: May 23, 2014, 1644 UTC »

Shhhhh, it's really the pleasure ships coming from Planet X for X-Day. Keep it quiet! Don't want the pinks to know...

39

General Radio Discussion / Re: A Centennial Celebration of Marconi and RCA Wireless Radio in West Marin, Califo

« on: May 23, 2014, 1642 UTC »

Lol, that's funny. Trans Atlantic was GB to Canada. Trans Pacific is just Hawaii to the continental US? Might agree if it was Australia/New Zealand or China / Korea, but strikes me that's only half way..

40

General Radio Discussion / Re: AmericanRadioHistory.com - Documenting the History of Radio and TV Broadcasting

« on: May 22, 2014, 1846 UTC »

Wow, what a brilliant site. Thanks for the link!

41

General Radio Discussion / Re: mystery radio bursts messages from ALIENS?

« on: May 22, 2014, 1815 UTC »

lol, meanwhile, it's a scientist at the radio telescope using a remote control to unlock his car doors...

42

The RF Workbench / Re: High Powered Pirates

« on: May 22, 2014, 1736 UTC »

This setup wasn't too shabby. Owner seems like a typical spoiled brat mind you... 4KW on FM apparently...

http://en.wikipedia.org/wiki/Mix_FM_(Ottawa)

43

North American Shortwave Pirate / Re: Whiskey Redneck Radio, 6929.2U, 0355z+, 5/4/14

« on: May 04, 2014, 0433 UTC »

Fading into Toronto, SINPO 24343

44

North American Shortwave Pirate / Re: Undercover Radio 6925 USB 5/04/2014 0208z

« on: May 04, 2014, 0306 UTC »

Great signal into Toronto +10 to +20 into Toronto. Keep it up!

45

Huh? / Re: Chuck Norris the DXer

« on: April 28, 2014, 2314 UTC »

Chuck Norris thinks turning off a tube linear when changing out the finals is for wimps.