Messages & Notes From
emrfd

1-8-to-450-MHz-Amp
10-7-mhz-if-transformer-7-8341
10-KHz-wide-filter
100-Crystals-for-AU-5-00
100-MHz-Crystal-Source
100Mhz-Crystal-Sources
100uH-RF-chokes-how-to-make-them
100uH-RF-chokes-how-to-make-them-TNX
10M-VFO-ideas
12-MHz-if-for-tx-applications
12BY7A-driver-to-Ten-Tec-6m-transverter
13-8V-12V-and-5v-supply-question
14mhz-Receiver
17-034mhz-crystals
18-MHz-Transceiver-Voltages
1N4007-in-SMT
1N400x-diodes-used-as-PIN-diodes-a-question
1n914-with-jfet-vfo
1n914-with-jfet-vfo-Solved
2-98-hexfet-linear-amp-what-am-I-missing
2-stage-buffer-amp-from-SSDRA
20-db-tap
2009-presentation-on-high-level-mixers
2012-ARRL-Handbooks-and-Antenna-Handbook
20m-XCVR-with-discrete-Gilbert-Cell-Mixer-completed
28-36-for-fifty-watts
2N5179-Top-view-or-bottom-view
2N7000-failure-mode
2SC1307-2SC1969
2SC1307-2SC1969-IMD-or-HD
2n7000-Failure
3-3v-TI-3253-mux-as-a-QSD
3-dB-splitter
3-very-good-articles-understanding-resistors-avoiding-ground-loops-modeling-skin-effect-in-Spice
30khz-resolution-filter-W7ZOI-K7TAU-SA
34-mhz-crystal-or-osc-help
3GHZ-VNA
3rd-order-Input-Intercept-calculation
4-9152-MHz-Crystals
4-pole-bandpass-filter-with-FSA-4157-switches
400-MHz-VCO
455Khz-filter-adapting
4cx250-heater
5-Watt-Amp-Opttions
50-MHz-RF-Generator
50-ohm-stripline
505-kHz-Experiment
505-kHz-experiment
5B4AGN-TXBPF
60-120MHz-VCO
60-120MHz-VCO-An-ALternative-Circuit
60-Cycle-Hum-on-End-Fed-Wire
602-oscillator
7-MHz-Oscillator-Capacitors
7-MHz-RF-amplifier-EMFRD-Chapter-8-Figure-8-22
7-mhz-bandpass-filter-experiments
70-years-ago-in-amateur-radio-frequency-control
74G74-Patato-IC-circui-help-needed
74HC4053-mixer-vs-passive-ring-diode-ADE-1-TUF-1
74L04-as-an-amplifier
75ohm-Input-Amplifier-in-50-System
7Mhz-xtal
9V-Li-ion-Battery-Capactiy
A-6L6-lasted-forever
A-COMPONENT-OF-INTEREST
A-FRONT-END-WITH-AN-IIP3-50dBm
A-Good-Old-VFO
A-HB-100-mHz-RF-Sweep-Generator
A-High-Isolation-Amplifier-Produced-By-JPL
A-NO-PASS-FILTER
A-Narrow-Xtal-Filter-DSO-Experiment
A-Phase-Modulator-that-doesn-t-work
A-Problem-Of-Impedance
A-Quick-Math-Problem
A-Simple-Sweep-Generator
A-Sudden-Thought-About-The-HYCAS-Project
A-TRANSFORMER-LESS-AND-FEEDBACK-LESS-WIDEBAND-AMPLIFIER
A-Wiki-entry
A-few-questions-on-filters-from-chap-3
A-low-distortion-QRP-linear
A-materials-question-pcb-as-capacitor
A-new-high-level-mixer-the-LT5551
A-no-bias-LC-oscillator
A-not-so-simple-regenerative-receiver-challenge-Was-Regen-musings
A-pic-dds-with-a-pll-cleanup
A-question-abot-level
A-question-on-transmatch
A-question-to-Dan-Tayloe-about-audio-filters
A-regenerative-detector-at-IF-behind-a-diode-ring-doubly-balanced-mixer
A-simple-25-watt-linear
A-simple-toroid-question
A-strange-New-I-Q-Mixer-Invention
AADE
AADE-Filter-Design-Software-Potential-Problem
AADE-Filter-Program
AADE-Frequency-counter
AADE-L-C-Meter-Fixture-Adaptor
AC-formulas-on-p2-25-vs-FBA-program-from-CD
AD2200-synchronous-demodulator
AD2200-synchronous-demodulator-Correction-ADA2200
AD8307-AT-LOW-FREQUENCY
AD8307-based-power-meter
AD8310-vs-AD8307
AD9912-DDS-clock-source-just-a-thought
ADD-REACH-TO-THE-AADE-LC-METER
ADE-1-Mixer-Port-Swaps
ADE-1-Mixers
ADE-Mixers
ADVISORY-AD-8307-in-Power-Meter-Applications
AGC-audio-chain
AGC-help
AGC-questions
AGC-range-in-mosfet-if-amplifier-chain
AM-detection-in-DC-receivers
AN-AD8307-BASED-POWER-METER-MODIFICATION-FOR-PEP-MEASUREMENT
AN-ANTIQUE-RADIO-TECHNIQUE-QUERY
AN-HF-VHF-Colpitts-VCO-Variant
AN-IMPROVED-RF-BENCH-GENERATOR
AOR-Proto-AR7070
ARRL-Challenge
ARRL-HBC-III
ARRL-Handbook-Projects
AW-AW-Losses-in-Diplexer
AW-Losses-in-Diplexer
AW-Mixer-Termination-w-Balanced-Amp
AW-Testing-Xtal-Ladder-Filter-Impedance
AW-X-Mode-Mixer
About-Elecraft-K2-Receiver
About-fundamental-xtals
Active-Loop-Antenna-Circuitry
Active-Monopole-Antenna-Amplifier
Active-antenna-amplifier
Adding-a-PLL-for-the-POS200
Adjusting-IQ-Phasing-Network-in-Direct-Conversion-r-Receiver
Adjusting-Values-of-Toroids
Advanced-VHF-Wattmeter
Advice-needed-on-Converters-for-PC-based-FFT-SA
Advice-on-selling-ham-magazines
Advice-on-textbook-references-to-inter-stage-wide-band-RF-coupling-transformer-design-theory-and-background
Affects-of-real-component-characteristics-on-BPF-response
Affordable-high-power-RF-caps
Against-Ugly-Construction
Alternative-Receiver-Architectures
Am-I-blocked
Amateur-Radio-Techniques-RSGB-book
Amidon-Micrometals-AL-value-derivation
Amplifier-Design
An-Audio-Noise-Generator
An-Incidental-NE602-Discovery
An-Incidental-NE602-Discovery-by-bkopski
An-Interesting-Method-Of-Tuning-Bandpass-Filters
An-RC-coupled-Linear-Amp
Analog-Circuit-Design-Art-Science-and-Personalities-Google-Books
Analog-Devices-AD831-AD8342-and-AD8343-Gilbert-cell-mixers
Analog-Meter-Faceplate-Modifications
Analog-VFO-Freq-Stablization
Ancient-FT-243-Xtal-Circuits
Another-Approach-to-DIY-PCBs-PCB-Press
Another-Mixer
Another-Spectrum-Analyzer-question
Another-trimmer-number-and-a-Class-E-question
Ansoft-HFSS-experts-here
Antenna-Tuners-and-Baluns
Antenna-pattern-with-a-drone
Anybody-willing-to-mail-me-a-pair-of-BN43-202
Anyone-a-circuit-for-a-Active-High-Impedance-Scope-Probe
Anyone-has-the-tech-not-es-article-of-Allan-Victor
Anyone-has-the-tech-notes-art-icle-of-Allan-Victor
Apache-AL13P-Laminator-is-Back
Approaches-for-low-voltage-transmitters
Arduino-controlling-Si570
Are-through-hole-devices-going-the-way-of-the-vacumn-tube
Art-for-Low-Noise-Audio-Chain
Article-translation-was-Video-of-simple-SSB-phasing-receiver
Atlas-210x-reboot
Audio-Amplifiers
Audio-DDS-as-a-reference-for-PLL
Audio-Filtering
Audio-RMS-voltmeter-schematic-needed
Audio-filter-ringing
Audio-level-for-DSB-full-modulation-with-DBM-modulator
Audio-noise-limiter
Audiophile-op-amps-was-Capacitance-vs-frequency
Automatic-bias-for-a-MOSFET-power-amp-and-power-up
Automatic-power-off-started-out-as-KA7EXM-microWattmeter
BC-348
BCI-problems
BD135-BD139
BD135-as-an-RF-amplifier
BD139-6-versus-BD139-16
BD139-RF-Power-Amp
BF225-transistor-data
BF991-discontinued
BFO-Feedthrough-into-IF
BFO-and-LO-isolation
BFR91-equivalent
BGA-Inspection-Requesting-Suggestions-Guidance
BLF188-Class-E
BPF-Board
BPF-Parts-Purchase-For-European-Hams
BPF-testing-advice
BS-170-PA-heatsink
Bad-news-good-news-better-news
Balanced-Mixers-advantages-or-disadvantages
Band-Pass-Filter-Boards
Bandpass-Diplexer
Bandpass-Filter-Design
Bandpass-filters-with-series-resonators-a-problem-in-the-design
Basic-Low-Pass-Filter-Design
Basic-Receiver
Best-Practices-for-PCBs
Best-of-Idea-Exchange-now-available
Best-way-to-cut-open-crystal-filter
Beta-Cutoff-for-BJT
Beta-Transconductance-was-new-with-questions
Bi-Directional-amplifiers-in-the-IF-strip
Biasing-a-NPN-for-Optimal-Q-Point
Bifilar-Torriod-independant-testing-and-also-SA-design-question
Bill-Kelsey-Kanga-US
Billion-Accounts-Hacked
Binaural-Audio-Off-Topic
Binaural-I-Q-Receiver
Binaural-Pseudo-Stereo
Binaural-Radio
Binaural-Receiver
Binaural-Receivers
Binaural-Weekender
Binaural-experiments-long-post
Binaural-receiver-listening-experiences
Binocular-Core-Winding
Bipolar-RF-Transistor-for-FLEA-TRX
Bipolar-array-input
Birdies-coming-through-the-crystal-filter-or-radiation-or
Birdies-from-WI-Fi-router
Books-for-sale
Bridge-T-Diplexer
Bridge-T-Diplexer-Report
Broadband-RF-design
Broadband-RF-design-candidate
Broadband-transformer-windings
Buffer-amplifier-distortion
Buffer-stage-troubleshooting
Building-R2-Replacement-for-LM387
Building-and-cooking-are-a-lot-alike
Building-the-Universal-QRP-Transmitter
Buying-Components
Buying-the-book
Buzzing-noise-in-DC-receiver-with-no-antenna-weird
Buzzy-FET-mute-switch
CA3046-availability
CA3046-squarer
CA3046-transceiver-in-SPRAT
CA3054
CA3055
CA3146
CD-Rom-replacement
CERAMIC-RESONATOR-WANTED
CPLD-Frequency-Counter
CS2100-synthesizer-chip
CW-Waveshaping
CW-filters-trade-offs-and-group-delay
Calculating-a-Butterworth-filter
Calibrating-RF-Power-Meters-With-DC
Calibration-thoughts-for-popcorn-power-meter
Can-any-body-help-me-with-a-Varactor-Circuit
Canning-Receiver-Lo-Key
Cannot-Read-Messages-From-Dana-Myers-Others
Capacitance-and-inductance
Capacitance-vs-frequency
Capacitor-Inductor-Values-In-Filters
Capacitor-value-in-Regenerative-Receiver
Capacitors-for-tx-output-lpf-and-bisaing-Mosfets
Carrier-oscillator-drift
Cartesian-loop-exciter
Cartesian-loop-exciter-QSK
Carving-up-PC-board-construction-single-point-grounding
Causes-of-Hartley-harmonics
Ceramic-capacitor-values
Ceramic-coil-forms-for-sale
Ceramic-discriminators
Ceramic-resonators
Changing-position-between-a-mixer-s-pad-and-diplexer
Chapter-10-DSPx-KDSP10-loader
Characterising-Unknown-Ferrite-Beads
Characterizing-Temperature-Drift-of-Oscillators
Charging-a-super-polymer-lithium-ion-battery
Choosing-capacitors
Circuit-design-simulation-software-recommendation
Clarification
Class-A-driver-PA-in-EMRFD-and-SSD-for-1-8-30-MHz
Class-C-tube-amp-load-resistance
Class-D-RF-Amplifiers
Class-D-amplifiers
Class-E
Class-E-12V-25W-push-pull-30M-high-efficiency-PA
Class-E-475Khz-100w-amp-was-IRF510-Successor
Class-E-amplifier-design
Classic-Document-Reconstruction
Classic-Multiple-Feedback-OPA-BPF
Cleaning-Coils
Clipped-Sine-Wave-Info
Clock-hum-and-woe
Coax-Connections-Within-Equipment
Codec-undersampling-question
Cognitive-Radio-What-is-it
Collecting-and-Storing-SMD-Parts
Collins-Mechanical-Filter
Colpitts-VFO
Combining-Low-Pass-High-Pass-Filters
Comments-on-PULGA-Flea-minimal-xcvr
Common-Gate-FET-front-end-filter
Common-Mode-Current-on-DC-line
Common-base-differential-mic-preamp
Component-sources-now-looking-for-signal-generator
Component-test-fixture
Component-test-fixture-now-M3-Digital-LCRZ-Meter
Conflicting-information-and-quesstion-about-the-SBL1
Contact-bounce-problem-with-AADE-LC-meter
Contacts-of-Relays
Conversion-Between-75-Ohm-and-50-Ohm-Systems
Converting-VFO-circuit-to-VCO
Copper-Plate-for-QRO-FET
Copper-Tape
Core-Loss-in-High-Frequency-Inductors
Correction-to-Fig-6-151-in-EMFRD
Coupling-Coefficients
Critique-my-hypothetical-multiband-LO-setup
Critique-this-class-C-80M-MJE181-12W-push-pull-amp
Crumbling-Solid-State-Design-for-the-Radio-Amateur
Crystal-Filter-Failures
Crystal-Filter-Sweeper
Crystal-Filters-IF-module
Crystal-Information
Crystal-Ladder-filters-above-30-MHz
Crystal-Size-for-VXO
Crystal-Sourcing
Crystal-Test-Set-Designed-by-Chris-Trask
Crystal-filter-impedance
Crystal-filter-matching-transformers
Crystal-filter-pull-frequency
Crystal-filter-success-Now-matching-to-a-homebrew-RX
Crystal-motional-parameter-measurement
Crystal-resistance-measurements
Crystal-resistance-measurements-follow-up
Crystals
Crystals-Ceramic-Resonators-and-VXOs
Crystals-and-Crystal-Filters
Current-Controlled-Inductors
Current-Source-s-for-High-Q-Crystals
Current-replacement-for-2SC1906
Curve-Tracer
Custom-crystals
Cutting-Copper-Clad-Board
Cutting-PC-Board
Cutting-PCB
Cutting-PCB-material-with-a-benchtop-shear
Cypress-to-improve-on-Si570
DAC-Control-of-VCO
DBL-diode-mixer-LO-level
DBM-driven-by-PECL
DBM-max-audio-drive
DC-Bias
DC-Phasing-Rigs-and-SMT-Devices
DD-50-to-7-MHz-Converter-Oscillator
DDS
DDS-60
DDS-Micro-Noise
DDS-driven-PLL
DDS-module-with-buffer-amp
DDS-vs-SiLabs-PLLs-was-JAN-Crystals
DFN-10-pad-package-prototyping
DG-Mosfets
DG8SAQ-VNWA-Schematic
DGMFs
DIODE-RING-MIXER-DISCUSSION-FOLLOWUP
DIP-Oscillators-A-Cautionary-Tale
DIY-build-of-Ebay-45W-CW-SSB-14-amp-with-mods-and-details
DSIP-Board
DSP-10-PCB
DSP-Experimentation-Question
DTC-designing-help
DTC-losses
Dayton-Specials-books-and-kits-from-Kanga-US
DeMaw-Design-Equation
Dealing-with-a-dirty-output-from-an-Analog-Devices-AD8954-DDS-chip
Debugging-help-chapter-1-first-transmitter-low-power-output
Decoupling-capacitors
Delay-lines
Design-tracking-PLL-help
Designing-Wideband-RF-Impedance-Transformers
Details-on-MC1496-based-SSB-Transceiver
Device-to-read-a-resonant-frequency-directly-accurately
Differential-LO-Drive
Differential-squarewave-drive-for-DBM
Differential-to-Single-Ended
Digest-Number-2082
Digest-Number-2831
Digest-Number-2917
Digest-Number-471
Digikey-PNs-for-ZOI-SA-TG
Digital-Readout-Noise-Problems
Digital-mixers-and-impedance-matching
Diode-1N913
Diode-Equivalent
Diode-Ring-Mixers
Diode-ring-mixer-question
Diplexer-from-a-1980-s-homebrew-DC-transceiver
Direct-Conversion
Direct-Conversion-Radio
Directional-Coupler-Construction
Disc-Ceramic-Capacitor-Adjustments
Discrete-component-version-of-Gilbert-Cell-Mixer
Disk-broke-Need-fba
Distorted-output-waveform-from-Wilderness-Sierra
Divide-by-2-in-Class-C-amplifier
Do-I-Need-to-Use-Diplexers
Double-Tuned-Circuit-Thoughts
Double-Tuned-Circuits-loaded-with-a-FET
Double-balanced-RF-Mixers-1dB-compression-point
Double-balanced-mixer-response-to-LO-3
Driving-Mixers
Driving-Mixers-was-Mixer-Purity-JFET-SA602-JFET
Driving-two-DBM-s-from-a-single-LO
Dual-Gate-MOSFET-Amp-Gain-and-AGC
Dual-Gate-MOSFET-Biasing
Dumb-and-embarrasing-question-RE-FQPF11P06-QFET
EA3FXF-EA3GHS-and-the-Pulga
EMFRD-Digest
EMRFD
EMRFD-1-3-long
EMRFD-2-11-power-amplifier
EMRFD-Book
EMRFD-Book-Availability-UK
EMRFD-Book-For-Sale
EMRFD-CD
EMRFD-CD-on-Linux
EMRFD-CHP-7-Sch-7-11
EMRFD-FEEDBACK-AMPLIFIERS
EMRFD-Fig-1-17-Audio-amp
EMRFD-Fig-6-79
EMRFD-Files
EMRFD-First-Transmitter-Schematic-Discrepancy
EMRFD-Ladpac-coils-exe
EMRFD-Mini-Circuits-sale
EMRFD-Revised-First-Edition-8-5-RF-Low-Noise-Amplifier
EMRFD-Revised-First-Editon
EMRFD-Signal-Generator-Extender-fig-7-28
EMRFD-in-the-Classroom
ERF2030-RF-transistor-anyone
Eagle-CAD
Ebay-DDS-VFO-board
Effect-of-Crystal-Load-Capacitance
Elantec-IC
Elecraft-K5-Info
Electrolytics-as-Ugly-Standoffs
Electronics-Courses
Elonics-E4000-docs
Elsie-and-Wine
Emitter-Follower-Output-impedance
Envelope-tracking
Equations
Equivalent-networks-for-top-coupled-circuit-filters
Errata-DTC-sidebar-on-3-14
Evolving-my-multiband-LO-chain-G3ROO-GM4ZNX-PLL-HC4046-vs-HCT9046
Excessive-current-drain-in-Analog-Signal-Processor
Expected-loss-in-TTC
Experimental-Methods-in-RF-Design-PDF-Format
Experiments-with-Primitive-FET-Mixers-pdf
Explosion
FDIM-2010-Challenge
FDIM-2010-QRP-Challenge-Clarification
FDIM-2011-Building-Contest
FDIM-2015-Homebrew-Contest
FDIM-Challenge
FDIM2015
FET-Balanced-Amp-Mixer-Termination
FFT
FFT-in-LTSPICE
FIGURE-5-6-FET-MIXER-analisys-with-APLAC-a-free-armonic-simulator
FREE-Simulation-software
FS-10-turn-potentiometers
FS-2N4416A
FS-Die-cast-Enclosures-Connector-Kit-for-Spectrum-Analyzer-project
FS-EZ-kit-lite-and-books
FS-RFToolKit-kits-HYCAS-IF-AMP-Kitlet-un-built
FS-Spin-Master-4803-Hotplate-Stirrer
FS-Variable-Capacitors
FS-book-Zverev-s-Handbook-of-Filter-Synthesis
FT-Transformer-power-capacity
FT200
FT37-J-core
FT950-to-Furuno-Amplifier-Interface
Fabricate-your-own-vacuum-tubes
Far-Circuit-Zero-Beat-Indicator-parts-list-help
Farhan-Visits-W7ZOI
Fast-high-Z-buffer
Favorite-Parts-list
Feed-through-capacitors-source-Was-Looking-for-W7ZOI-K7TAU-Spectrum-Analyzer-kit
Feed-thru-caps-use-on-VFO
Feedback-Amp-design-Procedure-questions-EMRF
Feedback-Amplifier-Attenuator-Pad
Feedback-amplifiers-in-series
Feedthrough-capacitor-values-1nF-0-001uF-versus-5nF-0-005uF
Ferrite-cup-cores
Ferrite-mix-31
Ferrite-properties
Ferrite-tubes-Binocular-cores-and-Ferrite-toroids
Fet-Noise-specs
Field-Day-Filters
Fig-11-14-Transmit-Chain-questions
Fig-8-22-Modular-Direct-Conversion-Receiver-of-EMRFD
Figure-3-31-single-crystal-filter
Filter-Crystals-A-Quick-Question
Filter-alignment
Filter-design
Filter-layout-to-minimise-unwanted-coupling
Filtering-simple-LO-s-or-BFO-s
Filters
Finger-Stock-source
First-Receiver
First-Transmitter
First-Transmitter-Problems
Fixed-X-F-FM
Floating-grounds-and-ground-return-currents
Flux-residue-deemed-harmful
Fm-transmitter-for-a-repeater
Follow-up-Excessive-current-drain-in-Analog-Signal-Processor
Fools-proceed
For-Sale-Agilent-34405A-DVM-Mint-condition
For-Sale-Agilent-34405A-DVM-mint-condition
For-Sale-Ferrite-Core-Collection
For-Sale-Ferrite-core-collection
For-Sale-Powdered-Iron-Core-Assortment
For-Sale-Trim-pots-for-PCB
Found-it-Buzzing-noise-in-DC-receiver-with-no-antenna-weird
Fourier-Transform-Machine
Free-SMT-parts
Free-old-15-MHz-Scope-Phoenix-Pickup-only
Frequency-Counter-Calibration
Frequency-Counter-Chapter-4
Frequency-Locked-Loop
Frequency-Offset-in-Phasing-Transceivers
Front-panel-hookup-ground-loop
Full-duplex-transceiver
Fun-with-the-2N7000-Frequency-locking-and-a-hybrid-pentode-MOSFET-mixer
Function-Generator
Funk-amature-magazine-project
Fuse-needed
Fuses
Fw-Crystal-Reality-Check-Please
Fw-Digest-Number-589
Fw-QRP-L-THE-ARRL-KILLED-MY-DOG
Fw-TI-to-acquire-National-Semiconductor-What-this-means-for-you
Fw-W7ZOI-14Mhz-receiver
Fwd-MOSQUITO-a-QRPn-SDR-MOSFET-TRANSCEIVER
G4COL-Experiments-with-high-current-Gilbert-cell-mixers
GNAT-1-40
GPLA-for-plotting-group-delay
GPLA-problems
Gain-of-MC1496
Gapping-an-Impedance-Transformer-to-adjust-AL
Gas-filled-tubes-arrestors
Gaussian-or-Equiripple-filters-with-real-crystals-beyond-Zverev
Ge-diodes-1N34A-vs-1N60-vs-AA143
General-Coverage-Receiver
General-Purpose-Test-Oscillator
General-Radio-1650-A-Impedance-Bridge-Manual-and-Ap-Notes
Getting-an-SA602AN-to-oscillate
Getting-into-RF-design
Getting-useful-harmonic-output-from-a-BJT-Colpitts-oscillator
Ghz-Scopes
Gilbert-Cell-output
Going-from-5W-to-100W
Good-Articles-Toroid-impedance-transformers
Good-Receiver-or-Transceiver-to-Build
Good-price-on-EMRFD
Good-sources-for-parts
Grayhill-clips
Great-Learning-Site
Grounded-Base-Power-amplifiers
Grounded-gate-amplifier-impedance
Grounding-Rules
Grounding-coax-cable
Grounding-the-Shield-of-one-or-both-ends-of-coax
Guanella-Brown-Boveri-Article
Guanella-Ruthroff-et-al
Guanella-paper
H-Mode-Mixer-as-tested-by-PA3AKE
H-Mode-Mixer-as-tested-by-PA3AKEuls
H-mode-mixer-frequency-limits
H-mode-mixer-questions
H-mode-mixers-etc
HB-Filter-for-6-KHz
HC-49U-vs-HC-49US-XTALS-for-crystal-filters
HC49-US-Crystal-Parameters
HELP
HF-Radio-Systems-Circuits-Book-WARNING
HF-noise-sources
HOME-BREW-PISTON-CAPACITOR
HP-1743A-Scope-Schematic
HP-8601A-sweeper-generator
HP-8640B
HP8640B-Manual
HP8640B-technical-manual-downloads
HR-Article
HTML-messages
HYCAS
HYCAS-Board-Different-than-Schematic-D4
HYCAS-IF-AGC-Advice
HYCAS-IF-amp-for-50KHz-IF
HYCAS-behaving-strange
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J310-Source-and-Drain-Swap
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JEDEC-EECA-JIS-Cross-Reference
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July-August-2012-QEX-Article
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K5IRK-W7ZOI-Receiver
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KENWOOD-TS-990-HAS-INTEGRATED-THE-H-MODE-MIXER-AS-1ST-MIXER
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Q-MULTIPLIER-QUESTION
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QRPs
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Quiet-Regulators
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RD16HHF1-FET-amp
RD70HHF1-amplifier-schematic
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Reducing-line-voltage-for-old-tube-gear
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Regarding-Trends-in-Discrete-Semiconductors
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SOME-OBSERVATIONS-ON-TOROIDAL-TRANSFORMERS
SPAM-AD9912-DDS-clock-source-just-a-thought
SPICE-simulation-of-an-oscillator-getting-it-to-start
SSB-Generation-Opinions-Please
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STEFAN-LZ1OV-SK-1ST-ANNIVERSARY
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Scratch-removing
Searching-for-a-book
Seeking-Low-Voltage-Broadband-Amplifier-for-VHF-UHF-Operation
Seeking-Receiver-Diagnostic-Techniques
Seeking-copy-of-Dome-Dec-1946-Electonics-article-on-phase-shift-networks
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Setup-File
Sheet-metal-techniques-for-radio-cabinets
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Si5351-VFO-BFO
Si5351A-facts-and-myths
Si5351A-output-level-vs-power-into-50-ohms-and-mixer-levels
Si5351A-version-improvements
Si570
Si570-VFO-for-210X-was-Measured-output-impedance-of
Si570-VFO-for-210X-was-Measured-output-impedance-of-various-inverters
Siglent-DSG-1025-as-RF-generator
Signal-Generator-as-a-Local-Oscillator
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Signal-Hound
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Siliconix-Application-Notes
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Small-SMD-trimmer-capacitors-with-moderate-temperature-coefficients
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Solid-State-Design-for-the-Radio-Amateur
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Some-Thoughts-on-Phase-Delay-Networks-for-DC-Receivers
Some-advice-on-used-HP-instrument
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Somewhat-OT-Paypal-Dysfunction
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Spice-and-PSpice
Spice-model-with-realistic-stray-inductances-for-MOSFET-PA
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Squeeze-More-Performance-Out-of-Toroidal-Inductors
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Static
Step-Attenuator-Project
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TDA1013B
TO-92-J310-FETS-Now-Obsolete
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Terminating-impedance-of-the-Yaesu-XF-455k-262-01-filter
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Thanks-for-HR-article
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The-Minima-transceiver
The-PLL-of-the-Raspberry-Pi
The-Problem-of-the-T2-Pro-Output-Stage
The-Simple-Scalar-Network-Analyzer-LONG
The-Solder-Wick-Chronicles-Part-1-The-Iron-the-Bench-and-the-Scope-Probe
The-best-QSK-how-to-replicate
The-changing-look-of-the-EMRFD-group
The-importance-Q-in-a-matching-network
The-most-noiseless-opamp-available
Theory-modeling-of-regenerative-detectors
Thin-Film-SMD-Resistors
Thoughts-on-15M-Transceiver
To-a-nice-home
To-change-the-subject-a-different-question
Toko-Inductors
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UHF-SDR-Transceiver
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Using-Feedthru-capacitors
Using-a-DDS-as-a-PLL-reference
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VFO
VFO-Drift
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VFO-level-for-SA612-Mixer
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VHF-Dipole-Feedpoint-Impedance-Match-Options-126-0-MHz
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VS-MC1350-Cookbook
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Vackar-Crystal-Oscillator
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Variable-caps-in-the-uk
Variable-gain-in-linear-amplification
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Video-of-simple-SSB-phasing-receiver
View-distortion-in-LTSpice
Villard-Cage-Antenna-was-Ferrite-properties
Voice-Power-Spectrum-Density
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Voltage-regulator-noise-phase-noise
W1FB-s-rigs-in-ARRL-museum
W2NSD-SK
W3NQN-Tx-BPF-Basic-Program-where-can-I-get-it
W7ZOI-14Mhz-receiver
W7ZOI-Crystal-Oscillator-question
W7ZOI-K7TAU-Spectrum-Analyzer
W7ZOI-K7TAU-spectrum-analyzer-saga-continues
W7ZOI-Spectrum-Analyzer
W7ZOI-Spectrum-Analyzer-100-mhz-Crystal
W7ZOI-Spectrum-Analyzer-Question-70Mhz-LPF
W7ZOI-W7PUA-Wattmeter-Calibration
W7ZOI-W7PUA-Wattmeter-current
W7ZOI-s-wattmeter
WA2EBY-IRF510-MOSFET-Amp
WA7EXM-Power-Meter
WANTED-MC145152-Freq-synthesizer-Chips
WAV-file-signal-generator-software
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WLW-s-500-000-Watt-Transmitter
WN5Y-Super-Blue-LED-Mixer
WTB-Autek-VA-1
WTB-VCXO
WWV-10-MHz-Receiver
Wanted-1750-kHz-crystals-and-or-crystal-filter
Wanted-to-buy-one-microR2-PC-board-with-contact-info
Was-unknown-K5IRK-W7ZOI-Receiver
What-are-you-going-to-build-before-XMAS
What-have-I-found
What-if-all-through-hole-went-obsolete
What-if-all-throuhg-hole-went-obsolete
What-is-a-Mini-Circuits-T2-6T
What-s-better-than-a-TIP31
What-to-use-to-sweep-the-100-mhz-Specan-filter
When-is-a-junkbox-semiconductor-too-old-to-use
Where-can-I-get-a-copy-of
Where-is-Everybody
Where-to-find-Serenade-8-5-SV
Where-to-find-crystals-for-converters
Which-capacitor-technology-to-use
Which-probes-for-frequency-counter
Wide-VCO-for-SA
Wide-range-oscillator
Wideband-RF-phase-shift-circuit
Will-EMRFD-Data-Library-Remain-Available
Will-the-Real-SWR-Please-Stand-Up
Winding-a-Balun-Core-for-use-with-a-diode-ring-mixer
Wire-Wrap-Wire-for-Toroid-Transformers
Wobulator
Would-one-of-these-car-starters-work-as-a-QRP-supply
Wrap-around-biasing-of-an-NPN
X-Mde-Mixer
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X-Mode-Mixer-was-mixers-strong-signal-immunity
X-Pad-Pictures
X-Pads
XF-9S42-43-44-crystal-filters
XTALs-for-filter
Xmit-Mixer-questions
Xtal-Frequency-Shifting-your-own-xtal-frequency
Yahoo-Syrup
Zener-protected-final-stage
a-minimalist-software-defined-radio-for-15m
a-new-low-phase-noise-clock-from-si
a-question-about-O-scope-waveform
a-simple-overtone-oscillator
ad603aq-questions
ad831-dc-receiver-in-files-section
ade-1-mixers
ade-mixers
air-core-toroids
alternate-for-Zverev-filter-book
an-accurate-L-meter
and-about-the-lsb-carrier-crystal-for-a-ladder-filter
another-Mixer-level-question
antennas-out-of-dielectric-materials
anyone-making-progress-on-surface-mount-R2
attenuator-to-use-with-clock-oscillator
audio-filter-design-rules-of-thumb
auto-power-off-circuit
balanced-antenna-with-unbalanced-tuner-balun
balloon-beacon
binaural-weekender
binocular-core-winding
book-differences-between-book-s-version
brass-permeability-at-vhf
buying-the-book
campbell-web-page
can-any-on-er-running-a-4cx250b-qrp
ceramic-resonator-power-limit
comparing-R2pro-with-PHASING-RECEIVER-WITH-TAYLOE-FRONT-END
component-values-in-EMRFD-schematics
cores
corrected-LTSpice-and-ELR-audio-amp-circuit-help-needed
crystal-filter-basic-questions
crystal-pkg-for-LSB-ladder-filter
current-commutating-mixer-s-termination-senstivity
current-mirror-as-a-current-sink-for-LM317
dBxxx-Relationships
digital-scope
diode-mixer-termination-and-degradation
diode-ring-mixers
diplexer-frequency-for-an-upconverter
disposing-of-the-etchant
doubly-balanced-diode-mixers-and-RF-IF-port-isolation
doug-s-book-on-learning-transistors
elecraft-k5
electret-biasing
electric-fence-enegizer
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electronics-workshop-crystal-set-reprise
emrfd-Looking-for-W7ZOI-K7TAU-Spectrum-Analyzer-kit
emrfd-QST-SA-110MHz-bandpass-filter-nearly-complete-but-I-have-a-few-questions
emrfd-Regenerative-Receiver-chapter-1-6
emrfd-digests
end-of-qrp-really
experimentalists
feed-through-capacitor-sources
feed-through-caps-and-multi-hole-aperture-core-ferrite-beads
fet-transistor
files-have-been-uploaded-to-show-xtal-filter-scans
filter-design-and-evaluation-by-grant-hansell
filter-design-with-standard-n-multiple-parts
filters
first-sound
free-noise-blanker-article-delay-device
fresh-meat
from-I-to-I-Q
general-question-about-DDS-chips-and-such
getting-pc-board-resist-spray
gian-k1-k2
ground-loops-on-thick-copper-clad
guanella
headphones
heathkits
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help
help-my-junk-box
high-level-mixers
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high-resistance-inductor
homebrew
homebrew-sig-gen
how-to-determine-proper-bias-for-a-MOSFET-power-amp
hybrid-twisted-pair-following-the-switching-mixer
hycas-resonant-circuit
i-q-vfo
i-read-that-am-radios-are-mostly-junk
ic-unobtanium
ills-of-DC-receivers
imd-of-unequal-levels
impedance-matching-in-audio-circuit
impluse-noise-blanker
impulse-response-graceful-or
is-phase-noise-additive
is-there-an-advanage-to-using-solder-with-rosin-flux-or-water-soluble-flux
ixys-rf
kanga-us
ladder-filter-question
ladpac2002
lettering
looking-for-documentation-for-R2-T2-and-LM2
looking-for-old-HR-article-on-linear-tuning
looking-under-the-bonnet-of-IC-7300
lost-the-emrfd-cd
low-loss-extreme-impedance-matching
low-loss-high-Q-front-end-for-vhf
low-output-IRF510
low-power-audio-amp
low-power-audio-amp-breadcrumbs
magnetic-lines-of-force
matching-for-RF-amps
measuring-IMD
measuring-oscillator-noise
measuring-oscillator-noise-Could-you
micro-R1-receiver
micro-R1-receiver-with-RA3AAE-mixer
microR2-gain
microT2-documentation
micrometal-s-powdered-iron-toroids
minimum-parts-transceivers-presentation-available
missing-documents
mix-differences-between-Amidon-and-Micrometals-iron-powder-toroids
mixers-strong-signal-immunity
mosfet-wide-band-amps
motor-driven-tuners-etc
multi-hole-ferrite-transformers
my-ebook-on-building-a-receiver
mystery-of-filters
nano-vacum-tubes
need-crystal-filter-info
nescaf-notch-filter
new-EMRFD-book
noise-6AL5-versus-semiconductor-diodes
noise-figure-for-small-signal-rf-amp-bf998-mosfet-versus-IF140-jfet
non-diode-bridge-mixers
noob-questions-on-building-a-tiny-tornado
nxp-rf-manual-11th-edition-available
off-topic-question-where-are-the-50k-audio-pots-with-switches
old-Tripplet-2432-sig-gen
old-step-attenuator
origin-of-Pretty-good-and-the-minimim-gain-superhet
oscillator-stability-VFO-BFO-stability
ot-about-rigol-1052E
paralleling-RF-output-transistors
phasing-RX-all-pole-filter-design
phasing-exciter-for-transmitter
piezoelectric-resonator-crystals
posting-text
power-amp
power-supply-filtering
precision-parts
problem-with-IRF510-push-pull-PA
programmable-rf-attenuator-chips
push-pull-amplifier-output-questiion
question-about-some-cable
questions-about-a-DDS-spectrum
re-KISS-mixer
re-measuring-phase-noisee
re-query-etc-Yahoo-Groups
reconditioning-previously-used-PC-boards
requesting-for-support-in-constructing-a-20-m-14mhz-band-10-to-25-watts-CLASS-E-linear-amplifier
requesting-information-on-feeding-balanced-antenna-with-a-L-match-atu
requesting-support-in-building-a-all-discreet-27-00MHz-CB-ssb-transceiver
retrieving-submerged-components-and-rigs
rf-pickup-from-relays
rocket-s-heat-shield-and-the-plasma-form-a-series-bandpass-filter-on-re-entry
s-match-atu
sa612-circuit
schematic-drawing-software
scope
scope-DSO-2250
scope-test
scope-trouble
self-protecting-multimeter
shielding-a-toroid
shielding-a-toroid-HELP-WES
si5351
silver-ink-pen-to-draw-circuit-boards
simpler-FET-final-More-thoughts-on-gate-drive
software-files
source-for-Si570
source-for-Si570-LVDS
spectrum-analyser-software
spectrum-analyzer
ssb-out-of-the-raspberry-pi
star-topology-in-radios
subway-construction
supersonic-mic
sweeperino
switching-mixers-and-bpf-ip3
tektronix-465M-vs-Rigol
terminating-impedance
test
test-message
the-flea-a-40m-minimalist-transceiver
the-kiss-mixer-some-more-questions
the-pain-of-va3iul
those-signals-on-433-92-MHZ
to-cool-device
transformer-phase-coupling-question
transistor-amplifier
trifilar-wound-smd-transformers
tubes-I-don-t-need
two-element-antenna-tuners
two-new-tools-for-the-amateur-radio-designer
two-questions-on-HF-transformers
uV-signal-measurements
uc734b-datasheet
ultra-linear-power-amplifiers
using-ladbuild-for-notch-filters
vectron-TCXO-use
vfo-and-splitter
vfo-stability
vhf-power-chain
vhf-transceiver-modules
w7zoi-Spectrum-Analyzer-specific-questions
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war-skies-and-dipoles
wes-booklet-on-setting-up-a-home-lab
what-cad-pcb-and-schematic-do-you-use
wide-range-double-tuned-circuit
winding-binocular-cores
wire
wire-rating-for-RF
xtal-filter-tuning
yahoo-breach
yahoo-groups-picture