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License Free, legal, low-power radio broadcasting

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Fantastic Forums!

March 24, 2005 by scwis Leave a Comment

Our FORUMS contributors are conducting some amazing discussions lately, be sure to check in regularly.

• Contributor Bill has a remarkable web site for those interested in the station planning process including extensive documentation.
• Almost everyone has weighed in on the BMI Licensing discussion, very interesting.
• Another popular thread is the Question of Range with lots of good comments.
• The more technically inclined are discussing
Interference filters and Matching coils for short antennas.
With over 120 registered users, more than 130 topics and almost 600 posts, your’re sure to find something you’ll want to catch up on. If not – start a new thread, you just might kick off the next big discussion!

Our FORUMS contributors are conducting some amazing discussions lately, be sure to check in regularly.

• Contributor Bill has a remarkable web site for those interested in the station planning process including extensive documentation.
• Almost everyone has weighed in on the BMI Licensing discussion, very interesting.
• Another popular thread is the Question of Range with lots of good comments.
• The more technically inclined are discussing
Interference filters and Matching coils for short antennas.
With over 120 registered users, more than 130 topics and almost 600 posts, your’re sure to find something you’ll want to catch up on. If not – start a new thread, you just might kick off the next big discussion!

Filed Under: Uncategorized

Why does my Transmitter Hum?

March 22, 2005 by scwis Leave a Comment

Because it doesn’t know the words! Or, it could be that you are suffering from one of several technical causes of hum in transmitter circuits…

Because it doesn’t know the words! Or, it could be that you are suffering from one of several technical causes of hum in transmitter circuits…

According to the folks at North Country Radio, there are several causes to consider.

These causes include:

• Power supply hum due to poor DC supply filtering

• AC hum pickup in the transmitter audio due to poor shielding

• Ground loops

• RF induced hum modulation on the transmitted signal

What’s the cure? Here are several links to technical articles dealing with hum reduction in audio and RF circuits:

Hum reduction info from www.northcountryradio.com

Pixie II tips, including hum redux, from www.kenneke.com

Some Tips on Sound Card Interfacing to Your Rig from www.arrl.org

Hum Rejection in Unbalanced Audio Cables from www.bluejeanscable.com

“Tweaks” from Magnan Cables – bottom of the article

Ground loops from www.epanorama.net

Breaking ground loops from www.epanorama.net

Hum Update Listserve for Hams from lists.contesting.com

Circuit tips from the Peg-Legged Bass Pig – middle of the article

Power and grounding techniques from Henry Pasternack

A short primer on RF/RFI & Grounding Techniques by KA7GKN

Happy Hum Hunting!

Filed Under: Uncategorized

It Just Might Be Parts & Kits Time

March 19, 2005 by scwis Leave a Comment

I rediscovered some great sources for parts and kits this weekend, here’s few…

I rediscovered some great sources for parts and kits this weekend, here’s few…

Take a look at our soldering poll while you’re here –>

DC Kits – several FM PLLs Datakits from the Datak Manufacturing
FM Transmitters: Assembled Modules and Kits Ocean State Electronics – RF Electronic Project Kits
Dan’s Small Parts and Kits – Dan’s Virtual Internet Catalog Technical information on FM Transmitter Kits (some older info – great background reading

Enjoy!

Filed Under: Uncategorized

Thank You to Our Good Neighbors!

March 17, 2005 by scwis Leave a Comment

These sites refer hundreds of visitors to Part15.us each month, and we are very grateful. A big ‘thank you’ to the many folks who include the Part15.us URL in their sig files, too! Here’s a list of some of our most active partners…

These sites refer hundreds of visitors to Part15.us each month, and we are very grateful. A big ‘thank you’ to the many folks who include the Part15.us URL in their sig files, too! Here’s a list of some of our most active partners…

walkerart.org
See how they grow – Walkerart/radio has been doing some great stuff, check ’em out!

Don Weaver’s LaserFM, http://thelaserfm.freewebpage.org
I use Don’s most cool ‘broadcaster’s skin’ for WinAmp – Check it out!

www.desmondcrisis.com
Pnoi radio’s article there sends many folks our way – Check it out!

Ramsey Forums
We get lots of visitors from the Ramsey discussion boards – Check it out!

www.radio-classifieds.com
Lot’s of cools stuff here, check ’em out!

jcgriffin.com
An outstanding mega-links page, rather than steal it, we’ll just link – Check it out!

nordlie’s home page

A quixotic mix of weather and technology links from a poor soul in North Dakota – visit for sympathy’s sake!

FLorida Low Power Radio Stations

A long time supporter of Part 15 and experimental broadcasting, check ’em out!

Filed Under: Uncategorized

Transmitter info and a scheduling proggy

March 13, 2005 by scwis Leave a Comment

Here’s a link to a source that sells popular kit transmitters in assembled versions. A free scheduling program that runs over VB5 is also offered.
www.oldtimeradioprograms.com

Here’s a link to a source that sells popular kit transmitters in assembled versions. A free scheduling program that runs over VB5 is also offered.
www.oldtimeradioprograms.com

Filed Under: Uncategorized

While you were out…

March 10, 2005 by scwis Leave a Comment

I spent some quality time with some of my other favorite web sites…


Don Lancaster’s Guru’s Lair
.
Nuts and Volts Magazine.

Marlin P. Jones & Associates
.
American Science and Surplus.

Enjoy!

I spent some quality time with some of my other favorite web sites…


Don Lancaster’s Guru’s Lair
.
Nuts and Volts Magazine.

Marlin P. Jones & Associates
.
American Science and Surplus.

Enjoy!

Filed Under: Uncategorized

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