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G8MNY > TECH 03.05.23 09:49l 90 Lines 2445 Bytes #999 (0) @ WW
BID : 46520_GB7CIP
Read: GUEST
Subj: Homebrew Testgear
Path: IZ3LSV<DB0ERF<DB0RBS<DB0RES<SR4BBX<SR1BSZ<EA2RCF<LU9DCE<VE3CGR<KA1VSC<
GB7CIP
Sent: 230503/0845Z @:GB7CIP.#32.GBR.EURO #:46520 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (Updated Dec 19)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
At a recent club meeting I showed off some of my large range of homebrew
testgear I have built & collected over the years. Not all constructed &
designed from scratch by me, but all got working properly & improved by me.
AF
A 2 Tone AF Test Osc Design
A Simple Telephone Tester
AF Noise Generator (White, Pink, & Red)
AF test amp
AF Wayne bridge Osc
AF Waveform Generator (20Hz-20kHz Sin/Sq/Tri)
Distortion Meter (1kHz)
8R 200W Dummy Loads (water jars with 2x 15Rs)
Simple AF Test Osc (1KHz Sin/Sq/Tri)
RF
A Homebrew HF SWR Bridge
A Homebrew UHF SWR Bridge
A Versatile Pulse Tester & Pot load
Absorption Wavemeter 100-300MHz
Clip on QRM ferrite Probe
DDS Osc 1Hz-50MHz PIC
Dip Oscillator 470KHz-250MHz
Freq Counter 0-200 & 430MHz
Freq Counter 0-50MHz PIC
PEP Meter modification
Piston Absorption Wavemeter 70-1000MHz
QRO 1kW HF Meter Dummy Load & Sniff
QRO Dummy Loads DC-23cms
QRP Power Meter & Dummy Load
QRP SWR Bridge
RF Directional Coupler (-40dB sniff @ 100MHz)
RF Noise Bridge for LF, MF, & HF
Spectrum Analyser Adaptor DC-80MHz (1989)
Spectrum Analyser Adaptor VHF-UHF
VHF Test Osc 144MHz AM/FM 1kHz mod
MAINS
LED as a mains NEON
Mains Isolation Transformer (200W)
Mains Peak/RMS/Mean Meter
Mains Plugtop Filter Adaptor
Mains Power protector
Maplin 13A Socket Mains Tester
Maplin Mains Meter 2000MU-UK
Variac 0-260V 200W
MEASURMENT
198kHz Off Air Standard (1, 10, 100kHz, 1, 5 & 10MHz)
Car Dwell Angle & RPM Meter
Component Tester LCR/ESR/Semiconductor PIC project
Kelvin Varley Voltage Divider
Meter Damping & Speed Up (general improvements)
Reaction Timer (just a ruler)
Scope & DMM Calibrator DC & 1kHz Square wave 1mV-10V p-p
OTHER
Capacitance Subs Box 100pF-1.9uF
High Voltage Probe (from a pen)
Lab Breadboard (PSUs, BB, Osc, DVM & LS amp)
Lab 0-35V 0-10A PSU was a "CS FL-305"
Simple PIV Test Circuit (1kV AC)
Resistance Subs wheel (10R-1M 24 values)
TOOLS
LED Test Screwdriver
Logic Probe
Soldering Iron Economiser/Boost
Thermostatic Soldering Iron LED
Voltage Indicator Screwdriver (LCD 12 50 110 240V)
TV
Cropeady test card Generator
PAL test waveform Gen (crosshatch, circles, ASC gains etc.)
75R Colour Impedance Bridge
N.B. not all of these I have written Packet Tech Buls about.
Why Don't U send an interesting bul?
73 de John G8MNY @ GB7CIP
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