My Lab

My Lab

W&G SPM12 Selective Voltmeter

2x HP 8640B RF Generator

HP432 Bolometer

IEP frequency counter

Eaton 2075B Noise measure

HP8569B Spectrum analyzer with HP 8444B tracking



Upgrading K3 with I4YSS, IK4HLQ

3x_K3


After summer thunderstorm, I found my K3 I/O board was not working, after chip change I/O board was working again

k3_io_board_repair


FM Broadcast PA 4 x 4cx250 modified to 144 MHz 1993

inside view click for RF


X-Verter 28 MHz - 144 MHz 1993 ARRL Handbook design

recent test


New 144 MHz X-verter front end I0FTG design 2006

still without transformers

box with pass band filter. Thanks to Franco IW4APQ for silver plating

116 MHz local oscillator with thermal heater


Testion GI7b on 144 MHz 2006

gi7b test


4m OZ X-verter 2007

4m OZ X-verter


4m GI7B PA 2008 Still QRX

4m GI7B


4m 3e DK7ZB design 2007

3el 4m dk7zb