Presentations by AD5X

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The 43-foot Vertical - Advantages, disadvantages, how to build and how to match

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Lightning - What it is and how to protect yourself

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Inexpensive HF Antenna Construction

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HF Mobile/Portable Antenna Ideas - Antenna Efficiency, Mobile Installation & Antenna Construction

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QRP Presentation by AD5X

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QRP Presentation Rev. A - Updated by Jim Stafford W4QO

Product Reviews by AD5X

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Hardrock-50 160-6M 50-watt Amplifier:  Neat addition for QRP radios.  Review

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MFJ-4403 Transceiver Voltage Conditioner:  Review.  Cleans up nasty DC sources and provides additional protection.

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Telewave 44AP 20-1000MHz Broadband Wattmeter:  Review

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Siborg Systems ST5 Smart Tweezers: Might be what you need if you do a lot of SMD work.  Review

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Elecraft KXPA100/KXAT100:  Review

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MFJ-223 Compact Graphical Antenna Analyzer:  Review.  Covers ham bands up to 60MHz.

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MFJ-225 Graphical Antenna Analyzer:  Review

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West Mountain Radio CBAIV Battery Analyzer:  Review

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Alexloop WalkHam Portable Loop:  Review

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Rigol DS1052E and Tektronix TBS1042 Oscilloscope Reviews:  These low-cost oscilloscopes are worth looking at.

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Array Solutions VNAuhf:  Review

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Elecraft KAT500 Auto-tuner:  Review

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MFJ-998RT and MFJ-994BRT Remote Auto-tuners:  Review

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The MeterBuilder MB-1 Digital Power/SWR unit:  Review

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Elecraft KPA500 Amplifier:  Review of the new Elecraft 500-watt amplifier kit.

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Remote Tuners and the 43-foot Vertical:  Review of the CG-3000, SG-230 and MFJ-927 remote tuners used with a 43-foot vertical

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MFJ-998 Legal Limit Auto-tuner:  Review

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Array Solutions VNA2180 Product Review:  Precision VNA for commercial and home lab use.

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Array Solutions AS-43A Digital Meter for Bird 43:  Convert your Bird 43 to a digital read-out wattmeter with excellent accuracy.

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Mini-Circuits PWR-6GHS+ Power Sensor:  1MHz-6GHz power sensor and applications for your workbench (plus PWR-6+ and PWR-8GHS+ versions)

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MFJ-706 EmComm System:  Review and modifications.  Now includes modification to support the IC-7000 (by W8CRH)

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Ameritron ALS-1300 1200-watt Solid-State Amplifier:  Review

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Ameritron RCS-12C (includes RCS-10/12):  Remote antenna switch controller and remote relay switch box

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Dishtronix DWM-2104A SWR/Wattmeter:  New peak-reading SWR/wattmeter review.

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Samlex SEC-1235M 30-amp Power Supply:  Review of this compact switcher

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The "NEW" Ameritron ALS-600:  Review of the remote controllable ALS-600

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Ameritron ALS-600 Solid-state HF Amplifier:  Review

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MFJ-925 Compact Auto-tuner:  Great for portable operation.  Review.

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SPE Expert 1K-FA 160-6 Meter Amplifier:  Review

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Tokyo Hy-Power HL-1.5KFK 160-6 Meter Amplifier:  Review

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MFJ-4416 Super Battery Booster:  Product Review

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MFJ-1664 Manual Screwdriver:  Review

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MFJ-935B Loop Tuner:  Review &  modification.  Includes discussion of MFJ-58B Antenna Kit

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MFJ-1775 40-2 meter Mini-Rotatable Dipole:  Review

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Gamma HPS-1a Compact Power Supply Review:  Tiny switcher handles 100-watt transceiver.

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MFJ-929 Auto-tuner:  Review of the new MFJ 200-watt auto-tuner

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MFJ-994B 600 watt Intellituner:  Review of MFJ's high-power auto-tuner

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PowerMaster VSWR/RF Power Meter:  Review

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ICOM IC-7000:  Review

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MFJ-4726/RC Desktop/Remote Transceiver/Antenna Switch:  Review

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AIM 4170 Antenna/RF Lab Analyzer from Array Solutions:  Review

Equipment Modifications by AD5X

bulletPreciseRF TTG1 External Accessory:  External attenuator and PTT unit for the TTG1 2-tone generator.
bulletKX3 Internal Speaker "Buzz" Fix:  If you have the speaker buzz, here's something that works well.
bulletKX3 Travel Case:  Inexpensive but sturdy case for portable transport (not really an equipment modification!).
bulletElecraft K3, KAT500 and KPA500 cable info:  Interconnect data, construction info, and cable sources.
bulletGamma HPS-1a PowerPole modification:  Replace the Molex connector with PowerPoles.
bulletAIM4170 Upgrade:  Change out the BNC connector to a SO-239 or N-connector in the original AIM4170
bulletMFJ-998 Modified to disable Elecraft KPA500:  Fast, effective disabling of the KPA500 for TUNE and High SWR conditions
bulletALS-600 LED Meter Lamp Conversion:  Change the bulb assemblies to LEDs in the ALS-600 amp and power supply
bulletALS-600 Flexible Amplifier QSK Keying Interface - Add Low Current Ground or +12V Keying, and Strappable Turn-Off Delay
bulletQSK for the ALS-500 and ALS-600:  Easy QSK mod for the Ameritron ALS-600 and ALS-500 amplifiers.
bulletTune Your Autotuners - Make the bypassed SWR of your MFJ-925/929/998 autotuners flat through 10 meters
bulletAmeritron ADL-2500 Dummy Load Modifications:  Flatten the SWR and add a fan on/off switch
bulletAmeritron ARI-500 mods:  Significantly improve the remote control flexibility of the ARI-500/ALS-600 combination 
bulletMFJ-4225 Front-Panel PowerPole:  Convert the Accessory Socket connector to an Anderson PowerPole
bulletPackage the Elecraft XG2 & 2T-gen:  Protect & improve these popular units
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IC-706MKIIG 15/17 Meter Instability fix - Easier than Icom Bulletin #928

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MFJ-902 Antenna Tuner with SWR bridge and IC-706/703/7000 keying

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MFJ-802B Field Strength Meter - Add antenna clips for storage and transportation

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MFJ-802X Improved Interconnect Cabling - Convert the 1/4" mono jacks to RJ11 jacks

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MFJ-4125 Power Supply - Add rear Anderson PowerPole connectors

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MFJ-259B Antenna Analyzer - Fast charge the internal batteries

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SG-2020 Fixed Sidetone Level - Simple mod makes CW operation easier

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MFJ-932 QRP Loop Tuner - Add resistive SWR bridge and vernier tuning

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MFJ-9420 Enhancements - Add Headphone jack, RIT and CW filter

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DSW-II-XX - Incorporate an on/off switch with the GAIN control.

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Ameritron ARB-704 Modification - Auto-mutes amp when used with MFJ-994B tuner

bulletButternut Vertical - Add 60 meters, three different ways!
bulletFlexible Butternut Vertical - Remote switch for 80-, 75-, & 60-meters
bulletButternut 30-meter Capacitor - Protect this capacitor from stress
bulletMFJ-267 SWR/Wattmeter/Dummy Load - Add a cooling fan and increase the dummy load response to 2-meters.
bulletYaesu FT-7 Mods - Extended 10-meter, switchable audio & XTAL CW filters, more.

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