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G8MNY > TECH 01.05.17 21:45l 479 Lines 21167 Bytes #999 (0) @ WW
BID : 42385_GB7CIP
Read: GUEST
Subj: TECH by Subject Index Update
Path: IW8PGT<CX2SA<GB7CIP
Sent: 170501/1741Z @:GB7CIP.#32.GBR.EURO #:42385 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
Hi Readers, (Updated Apr 17)
Here is the current list of the ever expanding TECH bull collection.
Not all 401 bulls (inc this 1) will be on your local BBS yet, but they will be
soon. Three bulletins are sent each day, so the whole set is repeated about 3
times a year. Some files are large & not split up. Most BBSs use a bulletin
timeout of 1-3 months, so you may have less than 100 bulls on it.
The files are often updated, as I Rx feedback on them etc. The date of the last
significant update is on 1st text line of each bull, so it can easily be
compared (download & abort "A") with your own file to see if you need the
update. The collection is not numbered as this would complicate new files in
the subjects etc.
Most of the files use the very efficient 8 Bit ASCII graphics set, (code page
437 or 850, "Terminal Font").
SUBJECT Title By Last Update
AERIALS
13cms 2 Lambda Slot G6KIU
13cms Dipole & Reflector VK3ABK Apr 07
13cms Yagi from Prigles Can KN9MWR Mar 06
160m 7 Ferrite Rod Aerial G8MNY Oct 10
23cm Skeleton Alford Slot G8MNY Dec 03
23cms 65el Loop Yagi Info G8MNY Sep 06
23el 1296MHz Ant Repair Spec G0ATV Jan 99
23cms 10el Yagis for ATV G3ZJO Feb 06
23cms 6el Yagi DG2GAJ Mar 05
23cms Flat Plate Aerial G8MNY Jan 03
2m & 6m Band "Neptune" Aerial G8AMG
2m 3el Yagi G0FTD Mar 06
2m 4el Quad you can build KI6DS
2m Fullwave Dipole G8MNY Mar 07
2m JayBeam LR2 Colinear G8MNY Sep 13
2m Slim Jim G0OEK
3 Band VHF indoor aerial G0FTD May 06
4m 5/8 Vertical G6OHM Nov 04
4m J Pole G6OHM Nov 04
6m 6el Yagi SP7QHP
6m 8el Yagi IK0ZIZ
6m Yagi from TV Antenna DG0OPK
70cm 8el Yagi 2E1ESY
70cms & 2m Dual Band Aerial VK4XT
70cm 19el Tonna Yagi info G0FTD
70cms 22el Yagi KE4IQQ
70cm 27el G3JVL's QLY G8MNY Jul 10
70cms Bowtie Beam G6OHM
70cms Collinear 2E1ESY Nov 05
70cms Bazooka Dipole PD2HFE May 04
A Nest of Dipoles for HF G8MNY Dec 12
Balloon & Kite Aerials G8MNY Aug 08
Bent Dipole with GAIN! SP5RH ?
Broadband 6el Yagi for Band 2 G8MNY Sep 12
Casting Lead Throwing Weights G8MNY Jul 09
Delta Loops G4WYW
Growing Loft to Roof Aerials G8MNY Nov 09
Simple /P HF Dipoles G8MNY Aug 13
Simple 1/4 Wave 2m Mobile Aerial G8MNY Oct 07
Tree Antenna Sky Hooks G8MNY Jul 08
Understanding Trapped Antennas G8MNY Feb 06
Using a G5RV on 160M G8MNY Aug 13
Wall & Chimney Brackets G8MNY Jan 16
WiFi Ant M1BYT Sep 10
AERIAL BITS
ATUs
HF ATU & SWR Bridge VC3000LP/QT G8MNY Mar 17
HF ATU & SWR Bridge MFJ-904H G8MNY Jan 16
VHF ATU Homebrew Design G8MNY Aug 05
BALUNS
12 Uses of HF Trifilair L G8MNY Apr 12
1:6 HF balun(200,300,450,600ê) PD2HFE Dec 04
1:1 HF Balun G8MNY May 09
50-72ê Balun for HF freq's G8MNY Jun 04
50ê - 200ê HF Balun G8MNY Mar 05
50ê - 200ê HF Transformer G8MNY Nov 09
Choke Balun for HF G8MNY May 09
Coiled Coax Choke Balun for VHF G8MNY May 09
Coax Sleeve Balun G8MNY Aug 04
HF Balun & Marconi T switch G8MNY Jun 15
Pawsley Stub Coax Balun G8MNY Jun 04
RF Directional Coupler G8MNY Nov 16
Testing Auto ATUs G8MNY Mar 17
True VHF Impedance with MFJ259B G8MNY Dec 16
FILTERS
23cms Filter G8MNY Dec 03
2m Cavity Filter VK2DKW
6m Filter Design? G8MNY Apr 04
60m Lowpass filter G3YRH Aug 04
Coax Traps G8MNY Nov 08
Drake TV-3300-LP QRO LP Filter G8MNY Oct 09
HF Rx Suckout Trap G8MNY Mar 15
VHF/UHF TVI Filter G8MNY Feb 10
ROTATORS
Rotator 12V /P G8MNY Jun 07
Rotator Alenco Diagram G8MNY Nov 05
Rotator Hishmann Hit Ro 250 info G8MNY Jan 15
Rotator Kenpro KR400 info G8MNY Apr 11
Rotator Radio Shack info G8MNY Jan 15
Rotator Western WE115 info G8MNY Nov 05
Rotator Yaesu G250 info G8MNY Jan 06
Rotator Yamato YB101 info G8MNY Nov 05
OTHERS
144/432MHz Homebrew Duplexers G8MNY Jun 04
4x Power Splitter for 2M or 70cm G8MNY Jan 05
Doppler DF Aerial Design G8MNY Sep 11
4 Aerial Doppler RDF G8MNY Jan 15
High Gain 70cm Preamp G8MNY Dec 09
Making a Phasing Harness G8MNY Jan 05
Corroded & Rusted Up? G8MNY Oct 09
Stacking, Baying or Boxing Ant G8MNY Dec 05
ATV (Sent to ATV etc.)
23cm ATV Repeater GB3HV G8MNY Jun 12
10 Pin VCR Camera Connections G8MNY
ATV Demo System @ Kempton Park G8MNY May 10
Black & Burst Sync Buffer G8MNY Feb 05
Hearing the ATV Buzz G8MNY Jan 09
Low Power Video Buffer G8MNY Feb 06
Radar clipper for 23cms G8MNY Feb 06
Re Digital ATV experience (DATV) G8MNY Feb 07
S-Video pin-out connections G8MNY
SCART Video Connections G8MNY Aug 06
Y Analogue SAT Rx bad for ATV G8MNY Feb 05
BROADCAST (some sent to BCAST)
1W @ 531kHz MW Station System G8MNY Sep 11
625 Line PAL Spec v Digital G8MNY Dec 07
A Quality Crystal Set G8MNY Feb 14
A TV masthead Preamp G8MNY Oct 07
AM Broadcast Radio Principles G8MNY Jan 10
AM TRF Radio G8MNY Nov 08
Band 2 6el Broadband Yagi G8MMY Feb 13
Band 2 6el Narrowband Yagi G8MMY Feb 13
BBC Testcard F G1KQH Apr 13
Coded Orthogonal Freq Div Mux G8MNY Nov 08
Digital TV so far (to DIGTV) G8MNY Aug 07
Digital TV /P G8MNY Feb 07
Ever Growing TV Adverts G8MNY Jan 09
FM Stereo Radio Principles G8MNY Feb 16
FM Stereo QRM G8MNY Feb 16
HiFi Dynamic Noise Limiter G8MNY Mar 13
IR Remote control failures G8MNY Sep 12
Locking a Frequency with 555 G8MNY Jan 16
Medium Wave Magnetic DF Loop G8MNY Apr 15
MW Radio 1st stage G8MNY Dec 03
Odd Projection TV Fault G8MNY May 07
Recording the whole LF + MF band G8MNY Feb 10
VCR Triplexer to TV G8MNY Mar 06
VHF/UHF TVI Filter (As above) G8MNY Jan 05
Technics Rx ST-RT550 G8MNY Jan 09
TV systems & displays (to HDTV) G8MNY Jan 09
CONNECTORS (Sent to IBM etc.)
25 Pin D-Type Parallel Port G8MNY May 04
Cables for Laplink, Fastlynx etc G8MNY
Diskette Drive Connector G8MNY
Gameport/Joystick Connections G8MNY
IBM Video Connections G8MNY
IBM XT/AT Keyboard connections G8MNY
ISA I/O card pin out M1BYT
Mouse Connections G8MNY Dec 05
Serial Interface Connections G8MNY Mar 05
USB Connections G8MNY Oct 07
CW
Passive CW headphone filter G8MNY Mar 04
CW K Pip Tone unit G8MNY Jan 10
FT290 CW KOX Circuit G8MNY Feb 06
TS700G CW KOX add on unit G8MNY Sep 09
MAINS CIRCUITS
70-260V Mains Auto Transformer G8MNY Dec 12
APC Smart 900 UPS G8MNY Nov 07
Constant Voltage Transformers G8MNY Oct 07
Earths G8MNY Nov 08
Economy Turn ON Timer G8MNY Nov 08
Essential Mains Changeover G8MNY Sep 13
Fairy Light Flasher G8MNY Feb 10
Fluorescent Lamp Circuits G8MNY Mar 08
LED as a mains NEON G8MNY Dec 05
Mains Power protector G8MNY Aug 07
Mains Plugtop Filter Adaptor G8MNY Sep 14
META HF Mellennium 810 UPS G8MNY Nov 12
Night Light Switch G8MMY Jan 16
Power Line Telecomm QRM G8MNY Jan 14
Saveplug Motor Economiser G8MNY Jan 13
SCR Drill Speed Controller G8MNY Feb 05
Small Alafontronica 500W UPS G8MNY May 16
Soldering Iron Economiser/Boost G8MNY Dec 04
Thermostatic Soldering Iron LED G8MNY Mar 11
TRIAC Light Dimmer G8MNY Aug 10
UK 13A Fused mains plug G8MNY Mar 08
Variacs G8MNY Dec 07
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 Aug 07
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 Jun 16
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
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 Apr 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 Feb 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 Apr 06
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 Nov 16
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 Nov 13
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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