4F1KJA Duplexer Calibration

(10:3)

4F1KJA calibrated a VGC VHF Duplexer

(19:45)

4F1KJA Calibrating a CIGNUS CP-22U UHF Antenna and RG8 Coaxial cable

(3:2)

4F1KJA Calibrated an RFS Duplexer

(18:5)

4F1KJA Fixed Minor Damage \u0026 Re-calibrate President Grant of Trek Madrid

(15:)

4F1KJA Finally improved \u0026 calibrated a CIGNUS CG-818 RPT

(7:17)

4F1KJA on a Lambda DU-262-L Duplexer

(27:40)

4F1KJA on Jiesai Duplexer

(28:20)

4F1KJA for DW1PPZ Air Band Dipole Antenna

(8:31)

How To Measure Ferrites using a NanoVNA

(21:13)

[Superheterodyne] Assemble AM radio kit 455khz alignment full

(9:48)

#142 Yaesu FT 101 Series Frequency Adjustment

(35:22)

Calibration of the MINI1300 Antenna Analyser

(6:35)

Measuring Common Mode Current Chokes with a NanoVNA

(36:40)

FX-4CR Custom Firmware

(16:11)

RigExpert or NanoVNA - Checking 1/4 Wave Coax Stubs #hamr #hamradio

(18:20)

4F1KJA Magallanes Cavite Repeater for AHL

(4:56)

TSP #241 - Ametek Jofra CTC-140A (-17C TO +140C) Dry Block Calibrator Repair \u0026 Teardown

(8:44)

4F1KJA personal Repeater Kenwood TKR 750 \

(7:35)

4F1KJA Maxtrak Signal Generator

(25:47)

4F1KJA for DU4UW Homebrewing Repeater

(14:47)

4F1KJA to RCAAF 1st Orientation Seminar

(15:41)

4F1KJA Webinar 9 Element 4 Amateur Radio Practice

(2:16:18)

4F1KJA Dipole Wide Band Antenna

(22:41)

4F1KJA Homebrewing the Hustler G7 Antenna

(12:8)

4F1KJA Repeater Installation Video

(14:33)

4F1KJA Encountered \u0026 Detected weak RX on CIGNUS CG-818

(4:9)

TokyoHy model HL85V

(6:24)

4F1KJA Restored the finals of ICOM IC-28H

(4:29)