Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums Thank you for visiting RF Cafe!

Modifying A Baby Monitor - More Wattage - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


Guest
Post subject: Modifying A Baby Monitor - More Wattage Posted: Fri Jun 10, 2005 9:21 pm
I'm a licensed ham and I need some diagrams or instructions on how to mod a 49 MHz baby monitor to put out more power. It's currently at 100 mW. I'm looking to boost that up to at least 500 mW.


Top

Guest
Post subject: Posted: Fri Jun 10, 2005 9:25 pm
I hit the send button too soon.

I've got a replacement crystal that'll go in as soon as I mod it so that it transmits in the 50 MHz band.


I'd appreciate any input on this.


Top

Guest
Post subject: Baby Monitor modificationPosted: Mon Jun 13, 2005 1:02 pm
In my experience, baby monitors come in two varieties:
1. Discrete designs (perhaps with some IC's)
2. Single-chip designs

In the first case, you might be able to modify the PA stage for more power. In the second, you probably can't do anything. That's how the FCC wants things - hard to make mods that make them illegal for the intended use.

You might check to see what you've got, and let us know.

Good Luck!


Top

Guest
Post subject: Posted: Mon Jul 04, 2005 3:32 am
I don't get what you're saying. "It's hard to make mods that make them illegal for their intended use." What does that mean? If it's operating under part 97 rules in ham bands then it's legal. I can modify and homebrew anything I want as long as I follow the rules for part 97. Now, as far as the actuall device. This thing's got a a simple PCB board. There's no IC.


Top

Guest
Post subject: Posted: Wed Jul 20, 2005 12:22 pm
Free Anonymous proxy list download: http://www.checkproxy.net



Posted  11/12/2012

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:
 AirplanesAndRockets.com

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !

height-line