Showing posts with label amplifier theory. Show all posts
Showing posts with label amplifier theory. Show all posts
Tuesday, April 23, 2024

EXCELLENT Video Series on RF Amplifier Design

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Run, don't walk, to this video series by RF MAN.   He is truly, THE MAN!  Pete N6QW found this series, passed it to Dean KK4DAS, who ale...
9 comments:
Wednesday, March 13, 2024

Using the RF Power Amplifier of the BITX40 Module

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  PA shematic from the BITX 40 Module Click on the diagram for a better view C.F. Rockey W9SCH (who alerted us in SPRAT 22 to the chicken sa...
5 comments:
Friday, September 29, 2023

"The Art of Electronics" #8 -- Why Not a Simple Emitter Follower as The AF Output Circuit?

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Click on the image for an easier read Back when Dean KK4DAS and I were trying to find a suitable AF amplifier circuit for our High School Di...
5 comments:
Friday, September 8, 2023

Why Building for 10 Meters is Harder than Building for Lower Frequencies

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Recently my trusty CCI EB63A .1kW amplifier has been in rebellion.  On 10 meters, it now often insists on being an oscillator.   It calms do...
9 comments:
Tuesday, June 7, 2022

SolderSmoke FDIM Interviews: A BRAVE HAM! Grayson Evans KJ7UM Presents a 50 Watt Amplifier to THE QRP GROUP!

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Wow, talk about walking into the lions' den!  Grayson Evans, author of "Hollow State Design" and guru of all things thermatron...
1 comment:
Sunday, June 5, 2022

JFET (Junction Field Effect Transistor) Video -- Part 1

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Good video.  I like how he related the real-world device to the Igs graph. Also, note the big variation in MPF-102 parameters.  Stay tuned f...
Monday, April 25, 2022

75/20 - 17/12 Two Homebrew Rigs in Scrap-Wood Boxes

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  I moved the 17/12 Rig off the workbench and placed it (as planned) atop the Mythbuster rig.  Now I have four bands easily accessible.  In ...
3 comments:
Wednesday, April 13, 2022

The 17 & 12 SSB Transceiver -- Circuit and Build Info -- Video #4

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I REALLY LIKE THIS RIG. IT IS LIKE A MAGIC CARPET THAT CARRIES MY VOICE ACROSS THE SEAS. Cutting Display Hole sets off smoke alarm. Revers...
3 comments:
Saturday, December 4, 2021

Dean's Supercharged, 16-Watt, Furlough 2040, Simple SSB Rig

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  'Tis a thing of beauty.  It is especially appropriate for us to use that Irish phrase because the design of the rig's new final am...
2 comments:
Tuesday, October 5, 2021

Dean KK4DAS Builds an EI9GQ 16 Watt RF Amplifier (and Noodles in the Process)

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  I really like Dean's description of the building process, especially where he describes the need to sit down with paper and pencil for...
3 comments:
Tuesday, August 3, 2021

AFTIA! The Audio Frequency Termination Insensitive Amplifier from W7ZOI

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  It really pays to check Wes Hayward's web site .  I looked yesterday and found something that we really need:  A termination insensiti...
3 comments:
Saturday, March 6, 2021

ZL2CTM's Simple SSB Transceiver

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Congratulations to Charlie Morris ZL2CTM for his first contact with his Simple SSB rig.   There are so many cool things in Charlie's vid...
2 comments:
Friday, August 14, 2020

Tor LB4RG Builds an IRF-510 Amplifier

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Click on the link to check out Tor's very FB and artistic video about his homebrew IRF-510 amplifier.  Very Nice.   Also, check out...
3 comments:
Monday, June 22, 2020

Feedback on Farhan's FB Feedback Amp Video

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As I said a couple of days ago, Farhan has put out a very informative video on amplifier design. During the video we can see him determin...
2 comments:
Saturday, June 20, 2020

Excellent Video from Farhan on Amplifier Design

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Farhan has produced a really excellent video explaining the theory behind the feedback amplifiers that we use in so many of our circuits....
2 comments:
Wednesday, March 4, 2020

N3FJZ's Al Fresco. BITX-inspired, TIA. 50 Watt, SSB Rig (Video)

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The last blog postings on Rick N3FJZ were in 2015 .  Rick sent me a very uplifting reception report, then we had a pretty amazing Homebrew...
1 comment:
Thursday, February 20, 2020

Tribal Knowledge: More on Tapping Metal

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Back in 2014, when I was putting together my EB-63A solid state amplifier, I had to learn how to tap aluminum so that I could attach my t...
1 comment:
Friday, January 31, 2020

WA2EUJ's NXP RF Power Amplifier Design Challenge Entry -- Won First Place Prize!

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Congratulations to Jim WA2EUJ.   First Place the NXP Design Challenge.  You can buy the board here:  https://sites.google.com/site/rfp...
Monday, November 6, 2017

Jan's FB Slovakian SMD TIA Boards

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Hello, I have put up my SMD version of the TIA amplifier boards online, in case someone wants it. The files are here: http://...
Saturday, September 16, 2017

The Road to QRO Perdition

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I want to start out by saying that this is NOT my fault.  I have been TRYING to do QRP things. Remember my recent Tuna Tin 2, Herring Aid...
6 comments: