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G8MNY > TECH 18.09.17 11:23l 288 Lines 12754 Bytes #999 (0) @ WW
BID : 57784_GB7CIP
Read: GUEST
Subj: TECH by Subject Index Update 2
Path: IW8PGT<IZ3LSV<I0OJJ<GB7CIP
Sent: 170918/0849Z @:GB7CIP.#32.GBR.EURO #:57784 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
Part 2
MICs
A Simple V.O.X. Circuit G8MNY Sep 09
Another Mic Preamp 2E1ESY
Autocaller with old Maplin kit G8MNY Mar 17
Mic DJ Preamp G8MNY Dec 12
Mic Preamps F5PBG Oct 05
Phantom Bal Mic Preamp+Gum Mic G8MNY Oct 04
Simple mic clipper for MC60A G8MNY May 10
Toggle PTT PA3BNX Apr 06
Yaesu DTMF Mic YM-48 G8MNY Nov 08
MODIFICATIONS
3 way supplies for radio etc. G8MNY May 05
BHI Noise Eliminating DSP LS G8MNY Dec 14
Comms Noise Squelch IC G8MNY Nov 09
CTCSS Project G4WGZ Nov 16
FT290/690/790 DC power mod. G8MNY Feb 06
FT290/690/790 mk1 PLL Fault G8MNY Nov 09
IC 735 No RF Output Fault G8MNY Jan 15
Laptop HDD Repair G8MNY Feb 07
MSF Time Signal Clock Feed G8MNY Oct 08
PA instability in ICOM IC735 G8MNY Apr 16
PA & PSU Fan Noise G8MNY May 15
Pac-Comm Tiny2 Battery Tale G8MNY Jan 08
TNC-PC Clock Basic program G8MNY Jul 11
PSK31 isolation interface G8MNY Nov 09
PALSTAR AT1500 ATU G8MNY Jul 13
Simple Carrier Squelch G8MNY Dec 06
Reducing Lamp surge G8MNY Jan 09
Variable Speed Fan for AF PA G8MNY Nov 08
Variable Speed Thermal Fan G8MNY Jul 15
PAs
2M 65W PA with 2x M6774H G8MNY Oct 14
4CX250B PA Regulated Supplies G8MNY May 13
4CX250B PA Timing & Control G8MNY May 13
ALC line for Drake L-4B PA G8MNY Feb 16
DC/RF Sensing PA Switching G8MNY Dec 03
Non relay instant RF Switching G8MNY Oct 05
Power Factor of Drake L-4B PA G8MNY Oct 10
PTT line for Drake 4B PA G8MNY Jul 07
Valve Heater delay Drake L-4B PA G8MNY Aug 16
Transistor PA Biasing G8MNY May 17
T500 M 12V 500W HF Linear G8MNY Jan 17
Using 2 HF PAs G8MNY Aug 13
/P & /M
12V Cow Fence for /P G8MNY Dec 03
12V Fluorescent Tube Fly Zapper G8MNY Jul 09
12V Fluorescent Tube Inverters ZR6CPB & VK3EUB
12V RF immune AF Booster Amp G8MNY Mar 08
A light 17M /P Mast design G8MNY Sep 13
A Proper Portable Setup G8MMY Aug 08
Cheap Battery/12v LED Light G8MNY Aug 13
Delayed Interior Lamp G8MNY Jan 10
Fluorescent 12V Dimmers G8MNY Aug 06
GARMIN Nuvi 200 GPS G8MNY Jan 09
Gin polling up large masts G8MNY Jan 16
Hands Free Mobile Mic G8MNY Sep 14
LED Bike Light G8MNY Jan 10
LED Lights DC0OS Jul 12
Towing & Reversing Bleeper G8MNY Sep 08
Towing Socket for Caravans G4VVQ Jun 12
Vehicle Gutter /P Mast Support G8MNY Apr 05
Wheel Nuts G8MNY May 16
Windup 8m Mast for /P G8MNY Nov 04
Windup Torch info G8MNY Dec 05
/P POWER
Car 12V Switch mode Adapters G8MNY Jan 08
1A Float/charge Pb Acid Batt G8MNY Oct 05
2nd Car Battery for /M & /P G8MNY Apr 08
7AH "F" NiCad Battery Pack G8MNY Apr 07
A battery Zapper by ON4CBL ON4CBL May 11
Auto SCR charger for Car Batts G8MNY Mar 13
Car Alternators G8MNY Sep 09
Cheaper Generators (EU only) G8MNY Dec 07
DC Power Conversion G8MNY Mar 13
Diesel Generators G8MNY Aug 13
DURITC 1kW 230V Inverter/UPS G8MNY Jan 13
HONDA Generator EX500 info G8MNY Aug 08
Inverter Petrol Generators G8MNY Jan 14
Lead Acid Batteries G8MNY Feb 10
NORTHERN 650W 2 Stroke Genny G8MNY Sep 15
MEDUSA SIP2300 Generator Info G8MNY Jul 13
MEDUSA SIP2300 Generator Repairs G8MNY Jul 16
NISSAN Generator GL600 info G8MNY Jun 09
Old Car Dynamos G8MNY Sep 09
PERFORMANCE POWER 1kW Genny G8MNY Jul 17
Petrol Generators for /P SSB 1 G8MNY Jan 09
Petrol Generators for /P SSB 2 G8MNY Jan 09
Power Devil Drill Charger G8MNY Oct 07
Recovering OLD NICAD/NMHI Cells G8MNY Feb 04
Regulating 12V Genny O/P G8MNY Jun 06
Simple SCR Regulated Charger G8MNY May 13
PSUs
0-35V 0-5A Lab PSU CS FL-305 G8MNY Sep 17
12V System Surge protection G8MNY Nov 03
A Common High Current PSU G8MNY Dec 12
A Common UA723 PSU G8MNY Apr 09
Adjusting 78xx/79xx Regulators G8MNY Feb 05
Battery Backup PSU G8MNY Sep 07
BNOS 12A 13.8V PSU G8MNY Dec 12
Chopper Regulators G8MNY Jul 11
DEL 7000815 SMPSU 12V 75A Mods G8MNY Jun 16
DRAE 24A 13.5V PSU G8MNY Dec 09
High AMP Crowbar Protected PSU G8MNY Sep 08
Lab PSU ZR6CPB
Low Voltage Drop PS G8MNY Jan 13
Palstar PS06 6A PSU G6MNY May 13
Reactance Controlled SM PSU G8MMY Sep 13
Reforming Caps G8MNY May 15
Regulating a Plug Top PS G8MNY Oct 08
Simple 20A PS G8MNY Sep 11
Simple Variable PSU G8MNY Nov 06
Splitting a floating PSU G8MNY Aug 06
Stopping HF Tx/Rx SMPSU QRM G8MNY Jul 06
Switch mode PS Principles G8MNY Dec 06
TEACHING
3 Rs Physics Problem (Answers) DK2ZA Dec 06
88mH Coils, Explained! G8MNY Dec 07
AC Theory G8MNY Mar 08
AC 3 Phase Power G8MNY Aug 08
AF Standing Waves G8MNY Apr 17
ASCII table for diagrams G8MNY Aug 11
Actual Antenna SWR LZ1LEN
An AF amplifier stage G8MNY Dec 04
A ton per cell battery G8MNY Nov 08
Bad SMPU Design G8MNY Sep 08
Calibrating Frequency G8MNY Nov 07
Christmas mains light chains G8MNY Dec 06
Coax Faulting G8MNY Aug 10
Coax Feeder Tests G8MNY Feb 11
CW/SSB Frequency G8MNY Sep 13
Darlington & Quasi Darlington G8MNY May 06
dBW & dB Levels G8MNY Jun 16
DC current sources for coax/AF G8MNY May 09
dBW & dB Levels G8MNY Oct 04
Decoding BBS Data Files G8MNY Oct 15
Driving Inductive Loads G8MNY Aug 13
Dual phase AF AMP explained G8MNY May 06
Faulting Tips G8MNY Sep 17
Ferrite Ring Demo circuit G8MNY Apr 10
Flashing LED lamp driver G8MMY Jan 14
FM Deviation Calibration G8MNY Jan 16
Infra Red Camera Trick G8MNY Mar 15
Kelvin Varley Voltage Divider G8MNY Nov 07
Laptop Fluorescent Tube Circuit G8MNY Nov 06
Light Levels G8MNY Mar 04
LM380/TDA2003 IC Audio Amps VE2ACT/G8MNYMar 06
LS Protection G8MNY Dec 08
Making ASCII Diagrams G8MNY Jan 09
Measuring Motor Efficiency G8MNY Feb 09
Microwave Ovens G8MNY Dec 08
Mobile Mast Madness G8MNY Aug 07
Modem Bauds & Bits G8MNY Mar 17
Mono Stable Revisited G8MNY Feb 16
Musical Scales G8MNY Apr 10
My Home HF Setup G8MNY Mar 16
Odd Resistance Finder G8MNY Nov 07
Old Valve Radios G8MNY Nov 09
PL259 Losses G8MNY+ Apr 11
Q Codes G8MNY Apr 09
QRO v QRP G8MNY Mar 14
Reducing Electronic RF QRM G8MNY Aug 07
RF Modules List G8MNY/DJ6VIApr 06
RF Signal Calculations G8MNY Sep 08
Rig DC Power & RF Hazards G8MNY Feb 12
Scope RF Trick G8MNY Apr 11
Simple 80m VFO G8MNY May 09
Sound Levels, dBA dBB & dBC G8MNY Jan 06
Spectrum Harmonics Demo circuit G8MNY May 09
Spectrum IF Demo circuit G8MNY Feb 10
SSB Demo Circuit G8MNY Dec 04
Technical Bul Feedback & DEAD G8MNY Dec 10
Transistors, SCRs & TRIACs G8MNY Feb 10
Tuned Circuit Scope Demo G8MNY Jan 10
Understanding Multipath G8MNY Feb 06
Understanding Transformers G8MNY Aug 15
Unijunction Transistor Circuit G8MNY Nov 05
Unit Madness G8MNY Aug 12
Valves (Tubes) G8MNY Sep 16
Variable RF Attenuator G8MNY Mar 10
Voltage Dependant Resistors G8MNY Dec 07
What is Multiplexing G8MNY Dec 08
Wire & Form Tapping out G8MNY Aug 07
Wire Conversion table HB9ABX Dec 05
Xerox Principles G8MNY Dec 04
Yet More IF Filters G3YRH Dec 02
Y Extended ASCII Graphics G8MNY Jan 14
TESTGEAR
198kHz Off Air Standard G8MNY Nov 16
A 2 Tone AF Test Osc Design G8MNY Jan 16
A Homebrew HF SWR Bridge G8MMY May 09
AF Noise Generator G8MNY Apr 17
AF Waveform Generator G8MNY Nov 14
A Homebrew UHF SWR Bridge G8MNY May 09
AKD's VHF/UHF Wavemeter WA1 G8MNY May 05
A Simple Telephone Tester G8MNY Sep 15
A Versatile Pulse Tester G8MNY Oct 07
Analyser Takeda Riken TR4122B G8MNY May 17
BURNS's MF-UHF Wavemeter TC-101 G8MNY Sep 12
Car Dwell Angle & RPM Meter G8MNY Jan 09
Clip on QRM Probe G8MNY May 13
Coax Tester G3YRH Jun 06
Comparing Off Air Freq Standards G8MNY Jan 15
Crystal Drift Compensation G8MNY Jan 08
Dip Oscillator G8MNY Nov 07
Drake WH7 QRO SWR bridge G8MNY Nov 06
DYMAR Mod Meter Type 1785 G8MNY Mar 08
Eagle DB120 sound meter G8MNY Feb 16
Early AVO valve tester G8MNY May 17
EdgcumePeebles Earthe Loop Z G8MNY Jan 08
EdgcumePeebles Megger & Low R G8MNY Jan 07
High Voltage Probe G8MNY Feb 17
Homebrew Testgear G8MNY May 16
Lab Breadboard G8MNY Nov 05
Lab Measuring DMM G8MNY Feb 16
Lafayete 57 Range Mulitmeter G8MNY Jul 12
LED Test Screwdriver G8MNY Nov 07
Logic Probe G8MNY Feb 07
Mains Peak/RMS/Mean Meter G8MNY Dec 04
Maplins Mains Meter 2000MU G8MNY Mar 10
Maplin 13A Socket Mains Tester G8MNY Aug 14
Marconi Distortion Meter TF2337 G8MNY Sep 16
Marconi Counter Type 2434A G8MNY Oct 16
Marconi 2019A Sig Gen G8MNY May 17
Measuring 1 of 3 Rs G8MNY Mar 06
Meter Damping & Speed Up G8MNY Jan 06
Meter Movement Types G8MNY Jan 14
Off Air Lock for Ref Osc. G8MNY Jan 15
Old Venner Counter Type TSA3334 G8MNY Feb 11
Oscilloscopes G8MNY Aug 12
PEP Meter modification G8MNY Aug 07
PIC Freq Counter Mods G8MNY Feb 09
Piston Absorption Wavemeter G8MNY Mar 06
Portable Appliance Testing G8MNY Jun 09
QRO 1kW HF Metered Dummy Load G8MNY Dec 12
QRO Dummy Loads G8MNY Jul 09
QRP Power Meter & Dummy Load G8MNY Feb 07
QRP SWR Bridge G8MNY May 09
Reaction Timer G8MNY Jun 05
RF Field Indicator FL-30AH G8MNY Mar 09
RF Noise Bridge for LF, MF, & HF G8MNY Sep 09
RTT Comms Test Set G8MNY Nov 16
RTT Automatic Mod Meter G8MNY Jan 15
Scope & DMM Calibrator G8MNY May 17
Scope Probes G8MNY Apr 09
Simple AF Test Osc G8MNY Nov 06
Simple Crystal Oven G8MNY Nov 08
Simple PIV Test Circuit G8MNY Feb 07
Spectrum Analyser Mods 88-89/1 G8MNY Mar 15
Spectrum Analyser Mods 88-89/2 G8MNY Mar 15
Systron Donner 115 Pulse Gen G8MNY Jul 13
Systron Donner 1702 Sig Gen G8MNY Jan 16
VHF Test Oscillator G8MNY Jan 16
Voltage Indicator Screwdriver G8MNY Aug 07
Watson 'Hunter' Counter Mods G8MNY Nov 16
If you like reading these buls please reply, any comments/updates welcome.
Copyright is waved for all my bulls, as they are for the benefit for all, but
please leave the callsign on the work if you publish it elsewhere.
Most of these buls, have been repeated on club websites (e.g. in Spanish) in
far less efficient formats like PDF, BMP, PCX, GIF, JPG. (not really suited to
packet) see www.theskywaves.net or do a search on G8MNY. But the purpose of
them is to improve the content of Packet Radio!
Try writing your own buls & make packet radio more interesting! See my "Making
ASCII diagrams" bul on how to do it.
If you have problems viewing or printing the 8 bit ASCII Graphics, see my bul
"Y Extended ASCII Graphics" for compatibility solutions on most platforms.
Why Don't U send an interesting bul?
73 de John G8MNY @ GB7CIP
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