M0UKD - Amateur Radio Blog
  • Home
    • Portable Operating
    • Contests
    • Technical
    • Construction
    • Satellite Operations
    • Special Events
  • About Me
  • Homebrew
    • Antennas
      • 70MHz Quarter Wave Ground Plane Antenna
      • 144MHz 2m Portable Yagi VHF Beam Antenna
      • Magnetic Loop Antennas
      • Homemade Carolina Windom antenna
      • Homemade 20 metre band loft dipole!
    • Baluns and UnUns
      • End Fed Half Wave Antenna Coupler (EFHW)
      • 1:1 Voltage Balun for HF wire dipoles
      • 9:1 Magnetic Longwire Balun / Unun
    • Simple CW Touch Keyer Circuits
    • Capacitive CW Touch Key Circuits
    • 2N6084 144MHz FM Power Amplifier
    • G3XBM 472kHz Transverter
    • Rig to Soundcard Interface
    • PIC controlled 500w ‘Modified Sine Wave’ Inverter
    • Alkaline battery charging circuit
  • Calculators
    • Slim Jim and J Pole calculator
    • 1/4 Wave Ground Plane Antenna Calculator
    • Ohms Law Calculator
    • dBm, dBW, µW, mW, Watt, KW and MW Calculator
    • Loaded Quarter Wave Antenna Inductance Calculator
    • ERP & EIRP Calculator
    • Resonant Frequency Calculator
    • PI attenuator calculator
    • T attenuator calculator
    • Air Cored Inductor Calculator
    • Inverted Vee Antenna
    • Parallel Resistor, Inductor or series capacitor calculator
    • Electricity cost calculator kW/h
  • Mods
    • Yaesu MH-31 Electret Condenser Mic Modification
    • MFJ-971 Portable Antenna Tuner Modifications
    • Icom IC-7200 SO-239 to N-Type Socket
  • Reviews
    • Manson SPS-9400 40A 3-15V Switchmode Power Supply
  • Other Stuff
    • Printable Amateur Radio Logbooks
    • Useful information on Lead Acid Batteries
    • Web Server Network Usage
    • Server Info
  • My Logbook
  • Contact Me

Mods

Just a couple of tweaks to commercial amateur radio equipment.

  • Yaesu MH-31 Mic Mod – Replacing the standard dynamic mic element with an electret condenser element.
  • MFJ-971 ATU Mods – Adding a tune/bypass switch and extra inductance for 160m.
  • Icom IC-7200 SO-239 to N-Type Socket – Changing the SO-239 to a decent connector!
Share this...Tweet about this on Twitter
Twitter
Share on Facebook
Facebook
0Email this to someone
email

Recent Posts

  • International Space Station NA1ISS contact with GB4YOTA
  • Building a 70MHz quarter wave ground plane
  • Receiving SSTV images from the ISS – ARISS 20th Anniversary
  • 1/4 Wave Antenna Calculator
  • A long break…
  • My first 23cm 1297MHz contact!
  • Icom IC-7100 SO-239 to N-Type
  • Reviews
  • RSGB 21/28MHz Contest
  • Practical Wireless 70MHz Contest
  • RSGB 2nd 70MHz Contest
  • Two years in the making – 70MHz 300w Amplifier
  • 5th 144MHz Backpackers Contest
  • Update to Slim Jim calculator
  • Working Happisburgh Lighthouse on 70MHz

Recent Comments

  • John M0UKD on 9:1 Magnetic Longwire Balun / Unun
  • John M0UKD on 144MHz 2m Portable Yagi VHF Beam Antenna
  • John M0UKD on Resonant Frequency Calculator – Inductance Capacitance LC circuit
  • John M0UKD on Slim Jim and J Pole calculator
  • John M0UKD on Loaded Quarter Wave Antenna Inductance Calculator

Archives

  • 2017
    • August 2017
    • July 2017
    • June 2017
    • March 2017
  • 2016
    • March 2016
  • 2015
    • November 2015
    • October 2015
    • September 2015
    • August 2015
    • June 2015
    • May 2015
    • April 2015
    • February 2015
    • January 2015
  • 2014
    • November 2014
    • October 2014
    • September 2014
  • 2013
    • March 2013
  • 2009
    • July 2009
  • 2008
    • October 2008

Site Map

  • Home
    • Portable Operating
    • Contests
    • Technical
    • Construction
    • Satellite Operations
    • Special Events
  • About Me
  • Homebrew
    • Antennas
      • 70MHz Quarter Wave Ground Plane Antenna
      • 144MHz 2m Portable Yagi VHF Beam Antenna
      • Magnetic Loop Antennas
      • Homemade Carolina Windom antenna
      • Homemade 20 metre band loft dipole!
    • Baluns and UnUns
      • End Fed Half Wave Antenna Coupler (EFHW)
      • 1:1 Voltage Balun for HF wire dipoles
      • 9:1 Magnetic Longwire Balun / Unun
    • Simple CW Touch Keyer Circuits
    • Capacitive CW Touch Key Circuits
    • 2N6084 144MHz FM Power Amplifier
    • G3XBM 472kHz Transverter
    • Rig to Soundcard Interface
    • PIC controlled 500w ‘Modified Sine Wave’ Inverter
    • Alkaline battery charging circuit
  • Calculators
    • Slim Jim and J Pole calculator
    • 1/4 Wave Ground Plane Antenna Calculator
    • Ohms Law Calculator
    • dBm, dBW, µW, mW, Watt, KW and MW Calculator
    • Loaded Quarter Wave Antenna Inductance Calculator
    • ERP & EIRP Calculator
    • Resonant Frequency Calculator
    • PI attenuator calculator
    • T attenuator calculator
    • Air Cored Inductor Calculator
    • Inverted Vee Antenna
    • Parallel Resistor, Inductor or series capacitor calculator
    • Electricity cost calculator kW/h
  • Mods
    • Yaesu MH-31 Electret Condenser Mic Modification
    • MFJ-971 Portable Antenna Tuner Modifications
    • Icom IC-7200 SO-239 to N-Type Socket
  • Reviews
    • Manson SPS-9400 40A 3-15V Switchmode Power Supply
  • Other Stuff
    • Printable Amateur Radio Logbooks
    • Useful information on Lead Acid Batteries
    • Web Server Network Usage
    • Server Info
  • My Logbook
  • Contact Me
Tweets by @M0UKD

Links

  • My YouTube Channel
  • My Flickr Photostream
  • My Raspberry Pi Home Server!
  • Web Server System Info
  • Solar Cycle Progression
  • Video Pixel Offset Calculator

Common Tags

4m 10m 12v 15m 17m 18MHz 21MHz 28MHz 40m 70MHz 160m Amsat Antenna Antennas Anytone AT-588 AO-51 Battery Compare Construction Contest Coupler Dipole DK7ZB Dungeness Efficiency End Fed FT-897D FT-991 FTDX1200 Half Wave HF IC-7200 International Space Station Inverted V ISS Photography Portable quarter wave Secret Nuclear Bunker Slim Jim Space Station SSTV topband Video Yagi
May 2022
M T W T F S S
 1
2345678
9101112131415
16171819202122
23242526272829
3031  
« Aug    
M0UKD Amateur Radio Station Information Page © 2007-2017.
This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish.Accept Read More
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Non-necessary
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
SAVE & ACCEPT