QST
1945 - 1950 - 1955 - 1960 - 1965 - 1970 - 1975 - 1980 - 1985 - 1990 - 1995 - 2000 - 2005 - Bottom
1915
1946
- Audio-modulated detection
- A beginner's two-stage transmitter
- More stations per megacycle at two meters
- Preventing self-oscillation in tetrode amplifiers
- A new kind of skyhook
- A simple "Wien bridge" audio oscillator
- A soup-can wavemeter for the 23 cm band
- Impedance matching with an antenna tuner
- Keeping your harmonics at home
- Let's not overmodulate - It isn't necessary!
- Narrow-band F.M. with crystal control
- An unusual rectifier circuit
- Automatic break-in circuit
- Coupling 500 ohm phones to the receiver
- The most inexpensive transmitter
- Design of cathode-ray tube circuits
- Those excellent c.w. signals
- Standing waves - good or bad?
1947
- A new phase-modulation circuit for narrow-band F.M. transmission
- A 15 watt modulator for low-power work
- Flat lines and loading
- A Tuned-line matching transformer
- Put 'em push push!
- Power increases and their effects
- More on speech clipping
- Fundamental beam patterns
- Clean-cut break-in keying
- N.F.M. Reception
- Finding the inductance of R.F. coils
- The balloon antenna rides again!
- Predicting amateur "conditions"
- A 40 watt modulator with cathode-coupled driver
- Narrow-band F.M. for voice communication
- House cleaning the Low-Frequency phone bands
- Basic principles of self-synchronous repeaters
- Matching the line to the ground-plane antenna
- Spurious transmitter radiations
- A useful formula for solenoid-inductor design
- Overmodulation splatter suppression
- A new noise-reducing system for C.W. reception
- Multielement radiators in close-spaced arrays
- An antenna for 7 Mc. DX
- Choosing a transmission line
- F.M. on two meters
- Audio filters for the speech amplifier
- Triode mixer vs. pentode amplifier
- Better N.F.M. reception with A.M. receivers
- V.H.F. crystal oscillators
- Combination bias supply and control system
- Variable end-linked coils
- Sunspots and very-high-frequency radio transmission
- The "Q5-er"
- How high is an inversion?
- Keying the tetrode amplifier
- Useful feeder support
1951
1953
- Voltage-multiplying circuits
- Simple remote tuning for the VFO
- Some ABCs of V.H.F. receiver design
- An inexpensive radioteletype converter
- A regulated screen supply
- Measuring sideband suppression
- 807 grounded-grid class B stage
- Inexpensive L and C standards
- Tetrode circuit for clamper tubes
- Lunar DX on 144 Mc!
- The transistor - or 25 miles on a hunk of Germanium
- Combining the antenna coupler and low-pass filter
- "Q"-section transformers
- An isolating oscillator
- Let's listen
- Voice controlled break-in circuit
- Peak-level control
- Meteor scatter
- TVI hints for the v.h.f. man
- Folded and loaded antennas
- Improving the series noise limiter
- Diode modulators
- The antenna coupler helps the receiver, too!
- Wide-band re-entrant networks
- Bandpass crystal filter for receiving
- A high-powered grounded-grid linear amplifier
- The "little firecracker" linear amplifier
- "De Luxe" keying without relays
- Short antennas for mobile operation
- Remote tuning for the high-c VFO
- Let's keep It simple - Adjusting the novice antenna
1954
- Build your own panoramic adapter
- The tin can low-pass
- More about soldering aluminum
- An r.f. assembly for mobile or fixed-station work
- Some principles of radiotelephony 4; Designing a modulator
- An improved volume-compression circuit
- A protective circuit for transmitting tetrodes
- Two-dial receivers and 100 kc. signals
- Bandspreading the clapp VFO
1955
- A crystal-controlled 144 Mc. converter for 75-A series receivers
- A variable bandwidth filter
- Supplementary data on the r.f. assembly for mobile or fixed-station work
- Remote end-fed antenna with coaxial line
- A steerable array for 7 and 14 Mc
- Graphite as a lubricant
- The "monoclipper"
- Frequency marker with 50 kc. intervals
- Overtone crystals - How and where to use them
- Flexibility in the antenna coupler
- Low-noise receiver design
- The multimatch antenna system
- Unidirectional loops for transmitter hunting
- A radical approach to single sideband
- Using the 6360 dual tetrode on 220 Mc.
- Ferroxcube cores and a high-selectivity I.F. amplifier
- A broadband antenna for 75 meters
- Parallel 6146s in the mobile or fixed-station r.f. assembly
- A 200 watt grounded-grid linear amplifier
- Guys for guys who have to guy
- Construction hint
- Versatilize your oscilloscope
- Band-scanning - the easy way
- Subinterval markers from a 100 kc. crystal
- Lightning protection for the transmitting antenna
- Low-noise receiver design
- Input circuit for either crystal or carbon microphones
- An improved antenna bridge
- The transistorized "little gem"
- 807s in parallel
- Power and meter facts in s.s.b. operation
- What about the low-frequency harmonics?
- Protection for volt-ohmmilliammeters
- Improved bleeder circuit
- Upper-air conditions for two-meter dx
- A low-cost code-practice oscillator
- Simple single-band preamplifiers
- 807s in a 150 watt bandswitching rig
- Ripple on the S.S.B. scope pattern
- Periodic inspection for copperclad wire antennas
- Scoring aluminum with a glass cutter
- The "extended lazy H" antenna
- A de luxe amateur-band receiver
- Tuning the mobile antenna from the driver's seat
- "Little oskey" - A monitoring oscillator and keyer
- 600 - 1200 volt power supply combination
- Rtty regulator circuit
- Homemade neutralizing capacitor
- A high-powered tetrode rig for 144 Mc
- A super-selective converter
- Budget 7 Mc vertical antenna
- Pi and Pi-L design curves
- Using the voltage doubler
- 6AN8-6BQ6 modulator
- Designing the VFO
- The "EZ-Couple"
- How to tune to A.M. phone
- Multiband L matching network
1957
- Grounded-grid tetrode kilowatt
- Variable band width Q multiplier
- A compact all-band antenna
- Simplified design of impedance-matching networks 2
- Simplified design of impedance-matching networks 3
- An S.W.R. indicator for transmission lines
- Low cross-talk six-meter converter
- A 200 Watt balun coupler for center-fed antennas
- A "wonder" on 20 meters
- Test meters and how to use them
- A saw-tooth crystal calibrator
- Simple gamma-match construction
- Wavemeters using butterfly tank circuits
- Transistorized regenerative receiver
- N.B.S. equatorial region V.H.F. scatter research program for the I.G.Y.
- The Norberg crud-o-ject
- A simple halo for 2 meter mobile use
- Linear amplifiers and power ratings
- The third method of S.S.B.
- Transistors in speech equipment
- Greater selectivity with the c.w. clipper-filter
- The effect of capacitance on power supply filter bounce
- A radio telescope
- Combination regulated power supply
- A window sill antenna
- Note on inductance calculation
- Transistor regenerative detectors
- An ultrastable keyed V.F.O.
- Morse key navy knob
- Let's increase V.F.O. stability
- Improved A.V.C. for side band and c.w.
- Compact AB1 Kilowatt
- Artificial earth satellites
- How to adjust a key and send good code
- Improved control circuit for regulated power supplies
- Notes on the product detector
- Transistor audio for mobile rigs
1958
- A New Receiver Tuning Principle
- Two linear amplifiers
- Squelch for the NC-300
- Feeding the simple antenna
- An expanded-scale a.c. voltmeter
- Adjustment of Gamma-Matched Parasitic Beams
- High-power transistorized mobile power supply
- Checking transistors
- Optimum stacking spacings in antenna arrays
- The versatile standing-wave ratio indicator
- 100 Watt transistor mobile power unit
- 50 Kc Transistor-multivibrator frequency standard
- Choosing capacitors selecting types for an S.S.B. exciter
- Hints on 144 MHz converter design and adjustment
- Screen grid protection with a surplus relay
- Keeping equipment cool
- 80 meter loading without harmonics
- Filtering and shielding the station receiver
- An All purpose 813 Amplifier
- A Directional Coupler for 144 Mc
- Splicing 300 Ohm line: An additional hint
- A two-band halo for V.H.F. mobile
- Combination power supply and modulator using transistors
- Pi-network tank design
- A desktop 650 watt amplifier
- Simple low-pass filter design
- Helical element ground plane
- Four band dipole with traps
- Wide band moderate power dummy loads
- Working inospheric scatter on 50 Mc
- New thresholds in V.H.F. and U.H.F. reception; The world below KTB
- Input impedance and fed-through power in grounded-grid amplifiers
- Don't clean ceramic material!
- Keep it clean
1959
- New thresholds in VHF and UHF reception; Devices and diodes
- Painless "Q-less" L networks
- The impromtu ground plane
- Simple phone monitor
- Surplus-crystal high-frequency filters
- The electronic eyeball
- Adjustable load for calibrating S.W.R. bridges
- Tuning with dielectrics
- Save cable in making parallel dipole antennas
- Some notes on guyed towers
- Solving your TVI problem
- New thresholds in VHF and UHF reception; Circuit theory and diode details
- A simple electronic key
- VR-tube receiver muting
- The C.W. man's friend
- Improvised R.F. sniffer
- Tapping close wound coils
- Accurate zero beating
- Emergency modulator
- A multiband antenna system for the newcomer
- "Just like QST, Except ...."
- The "K4HWY special" Antenna
- Operating the PL-172 in grounded grid
- New thresholds in VHF and UHF reception; Practical results
- Bandswitching the mobile antenna
- Drilling hint
- Hole drilling aid
- Glyptal solvent
- Receiver input impedance matching
- Bolt assembly hint
- Mobile antenna mount
- Voltage change nomograph for electromagnet coils
- Carpenter's trick
- Removing stuck beam elements
- Reading faded tube type numbers
- Restoring black crackle finishes
- Coaxial cable attenuation
- An inside picture of directional wattmeters
- Turnstile for two
- Illuminating meters
- Audio compression with transistors
- Simplified break-in control
- A junk-box DC volt-ohmmeter
- Transistor b.f.o.
- Back to back transformer circuits
- Clear plastic refinishing
- Shielding dummy loads
- Stop rotator freezing
- Transmitter neutralizing with the station receiver
- An 800 Watt P.E.P. input linear
- Station control circuits
- High-power triode amplifiers for 50 Mc
- Simple code-practice oscillator
- Ferroelectric capacitors
- VXO II
- Stable low voltage supply
- 100 kc calibrator with 10 kc markers
- Working toward lower noise figures in reception at 144, 220 and 420 Mc
- 6146s in parallel
- How to wind your own transformer
- Finding tuned circuit values
- Apartment-house antenna precautions
- A cool kilowatt plate transformer
- A 40 Watt transmitter for 220 Mc
- A crystal-controlled converter for 1296 Mc
- Additions to the 250 Series Matchboxes
- Simplified design of inductively-coupled circuits
- The Perseids powerhouse
- The tunnel diode, a new semiconductor device
- What value component?
- A flexible coax antenna
- Grid-dip meter calibration
- Changing resistor values
- Reducing charging circuit interference
- "A do-it-yourself" guide to design and construction of log periodic antennas
- Possible errors in V.S.W.R. measurement
- Power-line noise
- Grounded screen-grid operation for tetrodes
1960
- A complete break-in unit for c.w.
- A table-top half kilowatt
- Simplifying transmission-line problems
- Radioteletype conversion from receiver i.f.
- One-tube crystal-v.f.o. input circuit
- More sweep voltage for the electronic eyeball
- Oscilloscope circuit
- V.H.F. dummy loads
- Transistor V.F.O. with linear tuning
- S.S.B. exciter circuits using a new beam-deflection tube
- Notes on parasitic beams
- A poor man's Q multiplier
- Long antenna for a short lot
- Amateur V.L.F. observation
- High-level balanced modulator for D.S.B.
- Actual vs. apparent s.w.r.
- Design and construction of transistor power converters
- Harmonics, harmonics, harmonics
- A vacuum tube voltmeter r.f. probe
- Some new ideas in a ham-band receiver
- Simple converter unit with 24 Mc output using the 80 meter v.f.o. on 2
- "Der Loudenboomer" High-power grounded-grid AB1 linear for multiband s.s.b.
- Low-frequency mobile
- Three-band single-crystal conversion oscillator
- Polarized relay in the rtty converter
- D.S.B. balanced modulator
- I.F. noise limiter
- U.H.F. coaxial s.w.r. bridge
- Feeding grounded towers as radiators
- D.F. loop for 75
- "What's Up Top?"
- A 12 Volt 50 Watt transistor modulator
- Antenna patterns from the sun
- Improved selectivity for older receivers
- Lightweight utility mast
- Lace that wiring
- Sheet-metal drill
- Counterweight antenna support
- Experimental transceivers for 5650 Mc
- The inverted V-shaped dipole
- Tuning (S) meter circuits
- 813s in grounded grid
- A simple wavemeter for use in coax lines
- An improved audio-driven a.g.c. circuit
- The "Budget" vertical on 20 meter
- The nuvistor as an r.f. amplifier at 144 Mc
- How to stabilize your transistorized equipment
- Aluminum eyelets make good fever medicine
- Low-frequency parametric amplifier
- Safety mat
- Insulating paint
- Stability with simplicity
- Meter reading by sound
- Compression tuning in the v.h.f. range
- A dummy load off the mind
- Screen protection and more
- A Limited-space Antenna
- High-frequency crystal filters for s.s.b.
- The Gamma-matched ground plane
- The fox vox adapter
- Array design with optimum antenna spacing
- A v.h.f. variable-frequency crystal exciter
- Better way to install fittings on ¼ inch coax
- More on homemade transformer design
- Transistor preamplifier for dynamic microphones
- Measuring coil Q
- A high-pass filter for the ham receiver
- Radioteletype reception by tone conversion
- A cathode-ray transmitter monitor
- Multiband antennas using decoupling stubs
- A synched-multivibrator electronic key
- Using the 7360 in the HBR-16
- A simple antenna system for the novice
- Coax-to-terminal-strip adapter
- Broken tap remover
- Meter safety
1961
- A parametric amplifier for 1296 Mc
- A novice t.r. switch
- A 4-400A amplifier for c.w., s.s.b. or a.m.
- Timing adjustments in a sequenced change-over system
- Some applications of the semiconductor diode
- A brief case portable antenna
- High-output oscillator
- Prevent dial cord slipping
- High frequency filters for s.s.b.
- Fixed bias with audio a.g.c
- A combination code-practice oscillator-monitor
- Modified "little oskey"
- The DL1FK compact multiband beam antenna
- The backfire antenna
- 65 watt at low cost
- A pulsed, crystal controlled signal generator
- A.G.C. for Sideband and c.w.
- A home-built parabolic-type reflector for 1296 Mc
- Home-brew custom designing
- Surplus tubes + an old tv set = 150 watt amplifier
- A 75 meter s.s.b. transceiver
- Three-band quad for field day
- An evaluation of the nuvistor
- Multiband antennas using loading coils
- Breadboard transistor heat sink
- More sock-for-cents antenna
- Noise factors affecting V.H.F. communication
- Low-pass filter for 6 meter operation
- Construction techniques
- Coaxial transformer for voltage-fed antennas
- Note on transformer winding
- High-accuracy channels at 3 kc intervals
- A complete two-band station for the V.H.F. beginner 1 - A simple tuner for use with converters
- The spare-parts plutocrat
- Plate modulation for the TV-set/surplus transmitter
- Understanding tetrode screen current
- The 50 Ohmer transmatch
- Semiconductor rectifiers
- The Nikey
- An introduction to the klystron
- The grounded-grid linear amplifier
- An S.S.B. product-detector adapter
- Six meters with the TV/surplus 150 watt amplifier
- A multioutput variable-voltage power supply
- Tapped-coil pi networks
- A complete two-band station for the V.H.F. beginner 2 - The transmitters
- Transistorized auditory "grid-dip meter"
- Coaxial switch performance
- Nuvistor preamplifiers for 50 and 144 Mc
- Bearing oiler
- High-z-to-low-z microphone adapter
- High-power zero-bias grounded-grid linear
- A complete two-band station for the V.H.F. beginner 3 - The modulator, power supply and standing-wave bridge
- A utility power supply made from an old TV set
- The big whell on two
- Grid-dip oscillator calibration at V.H.F.
- The design of regulated low-voltage power supplies
- A complete two-band station for the V.H.F. beginner 4 - Crystal-controlled converters for 50 and 144 Mc
- Parametric amplifier for 432 Mc
- Air wound coils mounts
- A.F.C. with silicon capacitors for RTTY reception
- A filament choke for grounded-grid amplifiers
- E-Z up antenna for 75 and 40
- A novice three band antenna system
- An "ultra-linear" modulator
- Performance tests on the big wheel 2 meter array
- Single-switch RTTY control
- A method for determining V.H.F. station capabilities
- A wide-range transmatch
- Single-band grounded-grid linears
- Thoughts on keying filters
- The simplicity modulator
- Simple ground plane
1966
- The CWX
- Improving your receiver with a frame-grid R.F. pentode
- Smith-chart calculations for the radio amateur 2
- A.C. power for the noise generator
- Varactor multipliers
- Practical tripler circuits
- A varactor converter for 50 to 432
- A wide-range voltage-regulated power supply
- High-gain voltage-controlled transistor amplifier
- Oscillator instability in vhf transmitters
- Modulation in Radio Telephony
- Electrical Interference 1
- RTTY: Diversity is worth the effort
- Full break-in station control
- Finding the value of an unkwown inductance with an audio oscillator
- A center-fed "Zepp" for 80 and 40
- The "Stanley steamer"
- A transistorless 300-Watt mobile power supply
- Nonconductive Guys
- Electrical interference 2
- Mating shafts of different diameters
- Stable microwave oscillators
- High-performance RTTY filters 1
- Coaxial neutralizing capacitor
- The easy box; home-made cabinets with hammer and vise
- VFO stability; recap and postscript 1
- L networks for reactive loads
- High-performance RTTY filters 2
- Semiconductor heat sinks
- Why key clicks?
- Field-effect transistors
- Yagi vs. Quad
- V.F.O. stability; recap and postscript 2
- A transmatch for balanced and unbalanced lines
- Improving output from diode multipliers
- Miniature toroid cores
- Low-level blocked-grid keying
- Building a simple crystal V.F.O.
- A Review of transmission lines as circuit elements
- The field-effect transistor as a stable V.F.O. element
- Low-loss coax
- A passive limiter
- Evolution of a grounded-grid amplifier
1985
- A quater kilowatt 23-cm amplifier 1
- A quater kilowatt 23-cm amplifier 2
- The fine art of improvisation
- An inexpensive spectrum analyzer for the radio amateur
1986
- Small, high-efficiency loop antennas
- ALC for class AB1 amplifiers
- Electromagnetic pulse and the radio amateur 1
- Electromagnetic pulse and the radio amateur 2
- Electromagnetic pulse and the radio amateur 3
- Electromagnetic pulse and the radio amateur 4
1988
- Professional quality DTMF decoder and selcall system
- Phase noise and its effects on amateur communications 1
- Phase noise and its effects on amateur communications 2
- A low-drive, grounded-grid 3CX800A7 amplifier
- A simple tuning indicator
- A multipurpose DTMF encoder
- Improved anode parasitic suppression for modern amplifier tubes
- Toroids - Some practical considerations
1989
- Calculating power dissipation in parasitic-suppressor resistors
- A simple secondary frequency standard
- Is amateur radio hazardous to our health?
- Protecting power tetrodes
1990
- A tester for Crystal F, Q and R
- Circularly polarized Quagi antennas for space communications
- A simple and accurate QRP directional wattmeter
- Evolution of the short top-loaded vertical
- Practical battery-back-up power for amateur radio stations 1
- Loading coils for 160-meter antennas
- Practical battery-back-up power for amateur radio stations 2
- Practical battery-back-up power for amateur radio stations 3
- A triband microwave dish feed
- The off-center-fed dipole revisited: a broadband, multiband antenna
- A laser-communications primer 2
- A single-board bilateral 5760-MHz transverter
- Parasitics revisited 2
- The 160-meter antenna dilemma
- An improved input circuit for parallel-tube VHF power amplifiers
1991
- Basic steps toward eliminating telephone RFI
- Electrostatic discharge 2
- Using a noise bridge to measure coaxial-cable impedance
- Some thoughts about transmission-line myths
- Match bandwidth of resonant antenna systems
- The double-tuned Circuit: An experimenter's tutorial
1992
1993
- A high-dynamic-range MF/HF receiver front end
- A new standard for amateur radio analog facsimile
- The NRY, A simple, effective wire antenna for 80 through 10 meters
- A synchronous detector for AM transmissions
- The effect of continuous, conductive guy wires on antenna performance
- A high-directivity receiving antenna for 3.8 MHz
- A simple broadband dipole for 80 meters
- Inside the grounded-grid linear amplifier
- The earth detunes my antenna
- Taking the mystery out of diode double-balanced mixers
- Measuring and compensating oscillator frequency drift
- The lure of the ladder line
1994
- The nearly perfect amplifier
- Mother nature's radio
- Using a VU meter for phone-patch adjustment
- Key components of modern receiver design 1
- Key components of modern receiver design 2
- 8-band backpacker special
- Key components of modern receiver design 3
1995
- A receivingantenna that rejects local noise
- A K6STI low-noise receiving antenna for 80 and 160 meters
1996
2001
- A ground coupled portable antenna
- How to maximize your receiver's effective selectivity 1
- A simple TRF receiver for tracking RFI
- The Warbler; a simple PSK31 transceiver for 80 meters
- How to maximize your receiver's effective selectivity 2
- An automatic sealed lead acid battery charger
- Simple RF-power measurment
- The AMRAD active LF antenna