MRL®Data Sheet, Volume 1

MRL® Data Sheet, Volume 2

A Transistor Circuit
When to Tune the Latins
More on Neon Flashers
The Heath Crystal Receiver
Tube Loopstick Connections
See Our Catalog for Parts
Don't Smell the Solvents
1-Tube Phone Transmitter
Police Broadcasts
A Super-sensitive Crystal Set
Superex Model MTK Modified
Some Tube Substitutions
Variation in Regenerative Transistor Circuit
Runs Auto Radio from Filament Transformer
A Wehnelt Interrupter & Data on Spark Coils
Simple Lamp Code Practice Set
Free Power from the Aerial
MRL TRF Stage brings in Long Waves Good
Foreign Notes
An Aerial with a wallop
Heintze DX SW Crystal Set
Freak Radio Reception
Changes MRL 1-tuber to a Super-Regenerator
Imperfect Contact Detectors
Two Interesting 1-tubers

Working over the Winton Radio
Determining NPN or PNP
2-transistor Super-regen
More DX on Heintze's Crystal & Transistor Set
What can be done with a Simple Xtal in a good loc.
More on Electric Arc Lamps
Joe Amorose on Grounds
Variations of the Miller 595 Hi-Fi AM Tuner
Some Crystal Set Hints
An Efficient Regenerative Transistor Receiver
2N155 Power Transistor
A Volt-Ohm-Milliameter
The Foreign #1 Crystal Circuit
Beware of Lantern Battery
A Variation of Foreign #1
A Selective Single Circuit
The 2-band Crystal TRX Set
Back-to-back Multi-circuit Xtl
Cleaning and Renewing Old Variable Condensers
The Futura 2-transistor Reflex Pocket Receiver
Testing Transistors with Free Power Circuit
Notes on MRL #26 Diode-TRX
Japanese Experiments with TRX
and much, much more............

MRL® Data Sheet, Volume 3

MRL® Data Sheet, Volume 4

Grounded Grid RF Amplifiers
TV Repairs First Aid
Notes of the Flextal Xtal Set
A Quick Close Reference for Ohms Law
A Close-Coupled Xtal Set
Testing Transistor Leakage
Knight 3-tube AC Ocean Hopper
1-Transistor SW Reflex Set
3Q5 for 1C5 in MRL 1-Tuber
An Adjustable Blinker
For Better TV Reception
Try This Selective Xtal Cir
DX with MRL #10 on a Loop
The Mourning After (TRX)
Stillinger's Novel Xtal Set
A Spiderweb Coil Crystal Set
Bzowy's Selective Xtal Set
MRL 2-A Separates Big Stations
Tantalum Capacitors from E-S
Electrolytic Capacitors from E-S
The Harkness Reflex
Larry Woody's 1-Tube DX'er
TRX Amplifier for MRL 1-Tuber

Bypass Capacitors, Cont'd
Okinawa on 2-TRX Set
TO 4000Mc with a TRX
Simple Power Supply for TRX
Japan's Special Presses
An Odd Wave Trap
A Hot Xtal Circuit and Ampl.
Case's Diode-TRX Rig
Bzowy's TRX Rig
Make Your own Ferrite Cores
Addition to Selective Xtal
Doublets from TV Leadin
MRL #39 Xtal Experiments
Uses Heavy Wire for S.W.
Air Base Carborundum Set
Joe Bunt's Selective Xtal
Hints on Audio Transformers
Flexible Aerial-ground
Variation of MRL #22 Xtal
South America on MRL 2-A
400 Meter Noise Free Ant
Microphone Amplifier
Best Phone / Speaker Output
VOA on MRL 2 Crystal Set
Cutting Down on Electrical Noise
Bob Gray Reports
MRL Cell. Coils Hi-Q

MRL® Data Sheet, Volume 5

MRL® Data Sheet, Volume 6

Electrolytic Condensors
Improving Long Wave Bands
Radio District Chart
Hooking DP-16 to 1-Tuber
Radio Police Codes
Some New RCA Improvements
Some Good Shop TIps
Making a Hi-Frequency Tweeter
The American Morse Code
Another Free-Power TRX Cir
Battery Charger and B-supply
Increasing Selectivity of Diodes
Good Xtal Circuit from Argentina
Languages of India and Code
Neons for Dial Lamps
Schuman's Stereo Xtal Set
It Wasn't the Volume Control
Two Free-Power Rigs
Good Compact Rotating Aerial
Using TV Aerial
Our Doublet Aerial Hookup
MRL QRM with Tickler
Offset Screwdriver Ratchet
Laquer Thinner Use
Some Uses for Filament trans
What the MRL 1-Tubers are Doing
Quick B-batts for 1-Tubers
Simple Phone / Speaker Output
A Novel 1-Tube AC BC Set
Mounting MRL Vernier Dials
Transistor Experiments
Some MRL Xtal Set Reports
QRM Coil in 2 or 2-A Sets
An Efficient Xtal Set
Using 5-X Coils in 2 and 2-A
Substituting Super-het. Cond.

MRL 1-Tuber - Crystal Phone
Grid Leak Still Important
Taps on Enameled Wire Coils
QRM on Hi-Frequency Stations
Radio Hobby makes Good Boys
Use for a Flyback Transformer
Keep Those Polarities Right
Rigging a Density Meter
Kerosene Lamp Generator
Electric Operated Linotype
Our Handy Mounting Blocks
MRL 1-Tuber and Oscillation
Beware of Tube Voltages
Testimonials: 1-Tuber #26
MRL 2, 2-A Xtal Notes
Uses Aluminum Catwhiskers
Eternal Battery Charger
Hinode Receiver Type T-46
DO-31 2-Tube Report
Changes in DP-16 Amplifier
MRL 2-A and 10 Condensers
Land to Ship Station QRM
How to Make a Million Bucks
Changes in DP-31 2-Tubers
"Maru" Means "Port"
Top Speed in Waves
Remember Heath Xtal Sets?
New FCC Ruling on Transistors
2-Stage Amp. for 1-Tuber, etc.
Spacing MRL #2 Crystal Coil
Using Multiple Diodes
An Efficient Xtal and Amp.
Compact SW Aerial Unit
Two Selective Xtal Circuits
Good Holder for Those Leads
A Good Simple Xtal to Try
TV Set May Save Your Life
Holtzman's Powerful Set
Give a Boost to that Portable
How to Build a Drycell
Recharging Drycells
How to Make a Kaleidoscope
David Norcross Reports
A Variation of MRL #2 Xtal
A Free-Power with a Wallop
Bob Ryan's "Bare Bones" 1-Tube
Hints and Kinks