Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Forums Magazine Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Anritsu Alliance Test Equipment Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Bittele Centric RF Conduct RF Copper Mountain Technologies Empower RF everything RF Exodus Advanced Communications Innovative Power Products ISOTEC KR Filters Lotus Systems PCB Directory Rigol RF Superstore San Francisco Circuits Reactel RFCT TotalTemp Technologies Triad RF Systems Windfreak Technologies Withwave LadyBug Technologies Wireless Telecom Group Sponsorship Rates RF Cafe Software Resources Vintage Magazines Thank you for visiting RF Cafe!
Innovative Power Products Couplers

AM Power Amplifier - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2010 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

NOTICE: The original RF Cafe Forum is available again for reading, and the new RF Cafe Blog is an active board.

-- Amateur Radio

-- Anecdotes, Gripes, & Humor

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Miscellany

-- Swap Shop

-- Systems

-- Test & Measurement

-- Webmaster

SDO

Post subject: AM Power Amplifier Posted: Tue Sep 22, 2009 2:50 am

Captain

Joined: Tue Aug 26, 2008 5:18 am

Posts: 22

Location: UK

Hello all,

I need some help about designig power amplifier for 150kHz-1650kHz appliaction.

Gain requirement is better than 40dB with P1dB above 43dBm. Supply voltage 24V.

It is going to be two stage single ended design. I was thinking about using MW6004N as a driver. I am not sure if MRF281 can be used for this application as well.

Any info about the available devices along with some literature for matching networks will be appreciated.

Regards.

Top

LM317

Post subject: Re: AM Power AmplifierPosted: Sat Sep 26, 2009 9:53 pm

Captain

Joined: Tue May 20, 2008 8:13 pm

Posts: 5

Looks like the MRF281 is going to be out of production soon, so I wouldn't recommend designing it into a new product. It's advertised for applications with frequencies from 1 to 2.5 GHz, way far away from the AM band. Its s-params only go down to 100 MHz.

http://www.freescale.com/files/rf_if/doc/data_sheet/MRF281.pdf

I can't find any data on an MW6004N. Who makes it?

Top

SDO

Post subject: Re: AM Power AmplifierPosted: Mon Sep 28, 2009 9:34 am

Captain

Joined: Tue Aug 26, 2008 5:18 am

Posts: 22

Location: UK

Hi,

Thanks for your response. Yes, you're right not to use MRF281. The other device was MW6S004NT1

http://www.freescale.com/webapp/sps/sit ... T1&fsrch=1

Any idea about power device which can deliver 10-20w at 1MHz and 24-28V?

Thanks

Top

IR

Post subject: Re: AM Power AmplifierPosted: Tue Sep 29, 2009 3:15 pm

Site Admin

Joined: Mon Jun 27, 2005 2:02 pm

Posts: 373

Location: Germany

You may try Polyfet www.polyfet.com

They have line of RF Power Transistors for low frequencies also suitable for AM.

Good luck!

_________________

Best regards,

- IR

Top

SDO

Post subject: Re: AM Power AmplifierPosted: Wed Sep 30, 2009 3:48 am

Captain

Joined: Tue Aug 26, 2008 5:18 am

Posts: 22

Location: UK

Hi,

Thanks for your reply. Polyfet has got some devices and I have seen some more at semelab as well.

Thanks gain.

Posted  11/12/2012

Berkeley Nucleonics Corporation - RF Cafe
everythingRF RF & Microwave Parts Database - RF Cafe
KR Electronics (RF Filters) - RF Cafe
Exodus Advanced Communications Best in Class RF Amplifier SSPAs
Amplifier Solutions Corporation (ASC) - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free

 

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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