Shortwave Radio
This site is a collection point for information, construction techniques, theory, and enjoyment of Shortwave Listening.
Site Map
=================
EQA-1 EQ & Analyzer
Commercial AM/FM Tuner
VHF/UHF Preamp
EAS-4 DX AM Receiver
EAS-3 DX AM Monitor
EAS-2 AM/FM/WX Monitor
EAS-1 AM/FM/WX Monitor
ACP-1 Audio Controller
Ultra Clean Power Supply
10 MHz UPCONVERT (SWL)
Studio Clock/Timer
Broadcast Band Monitor
Diversity Audio &
a Digital Receiver
Mackay (ITT) 3030A
McKAY Dymek DR33C-6
Watkins-Johnson VHF
Active Multicoupler
WWVB Atomic Clock
WWVB Dual Clock
WWVB Master Clock
Crazy receivers
Time and Temp
RACAL Disaster
RACAL Twins shootout
Watkins-Johnson Meters
NEW Demodulator
Listening Post Accessories
MIL-SPEC LP Photos
My Listening Post 1 2
Dual LF/MF Receiver
NEW - AUG 2010
NEW: RFP Parametric
preconditioner
R&D: 1 2 3 4
L@@k Photos 1 2 3
Active and Proximate Antenna
Tests
AM Broadcast Directory Updated
for 2010 !!!
Receiver Reviews
BEST Radios
IC-R75 UPGRADED
IC-R71A Mods
PREVIEW: KMD-1
Demodulator
NEW - Surveillance Receiver with
Audio Console
How it Began
PRESELECTION
Design Notes NEW
Preselectors
Basics
Theory
Filters
Design
Type-3 (Theory)
Type-3 (Construction)
Type-4
Type-5
Type-6 NEW
Published Article
Early R&D
Modular Design Approach
Component Parts Sources
=====================
PRECONDITIONING
Complete BCB Preconditioner
A Dynamic Noise Blanker
* * * REVISED 12-07 * * *
A Dynamic Noise Phaser
* * * REVISED 12-07 * * *
Antenna Switcher
with Imp Match & Gain
=====================
BUILD A BCB RADIO
SR-III Hot-Rod
(or go to:)
Concept Panel Designs NEW
Ant Rod Freq Counter
Panel Layout Panel Machining
Audio Mods Meters Pre-Circuit
Schematic Collection
RCA-HISTORY (re: SR-3)
=====================
MISC SWL FUN
KENWOOD TH-F6A mods
MFJ-965 Soup-up
AM DX Automobile Antennas
North Country Active Antenna
(my review)
All-Band SWL Antenna
(that really works)
Receive Matching Transformer
A 9:1 Balun
(for your end fed ant)
Yaesu FRG Mods UPDATED
Balun Grounding
(important)
Wire Antenna Rigging
(the easy way)
Home brew Super Insulators
AM Box Loop
(that works good)
The Old Days WPE Certificates
SONY Tabletops
Clear Channel AM BCB List
TSCM (Bond...James Bond)
IBOC Woes
Tuners Transmatchers Couplers
=================
EQA-1 EQ & Analyzer
Commercial AM/FM Tuner
VHF/UHF Preamp
EAS-4 DX AM Receiver
EAS-3 DX AM Monitor
EAS-2 AM/FM/WX Monitor
EAS-1 AM/FM/WX Monitor
ACP-1 Audio Controller
Ultra Clean Power Supply
10 MHz UPCONVERT (SWL)
Studio Clock/Timer
Broadcast Band Monitor
Diversity Audio &
a Digital Receiver
Mackay (ITT) 3030A
McKAY Dymek DR33C-6
Watkins-Johnson VHF
Active Multicoupler
WWVB Atomic Clock
WWVB Dual Clock
WWVB Master Clock
Crazy receivers
Time and Temp
RACAL Disaster
RACAL Twins shootout
Watkins-Johnson Meters
NEW Demodulator
Listening Post Accessories
MIL-SPEC LP Photos
My Listening Post 1 2
Dual LF/MF Receiver
NEW - AUG 2010
NEW: RFP Parametric
preconditioner
R&D: 1 2 3 4
L@@k Photos 1 2 3
Active and Proximate Antenna
Tests
AM Broadcast Directory Updated
for 2010 !!!
Receiver Reviews
BEST Radios
IC-R75 UPGRADED
IC-R71A Mods
PREVIEW: KMD-1
Demodulator
NEW - Surveillance Receiver with
Audio Console
How it Began
PRESELECTION
Design Notes NEW
Preselectors
Basics
Theory
Filters
Design
Type-3 (Theory)
Type-3 (Construction)
Type-4
Type-5
Type-6 NEW
Published Article
Early R&D
Modular Design Approach
Component Parts Sources
=====================
PRECONDITIONING
Complete BCB Preconditioner
A Dynamic Noise Blanker
* * * REVISED 12-07 * * *
A Dynamic Noise Phaser
* * * REVISED 12-07 * * *
Antenna Switcher
with Imp Match & Gain
=====================
BUILD A BCB RADIO
SR-III Hot-Rod
(or go to:)
Concept Panel Designs NEW
Ant Rod Freq Counter
Panel Layout Panel Machining
Audio Mods Meters Pre-Circuit
Schematic Collection
RCA-HISTORY (re: SR-3)
=====================
MISC SWL FUN
KENWOOD TH-F6A mods
MFJ-965 Soup-up
AM DX Automobile Antennas
North Country Active Antenna
(my review)
All-Band SWL Antenna
(that really works)
Receive Matching Transformer
A 9:1 Balun
(for your end fed ant)
Yaesu FRG Mods UPDATED
Balun Grounding
(important)
Wire Antenna Rigging
(the easy way)
Home brew Super Insulators
AM Box Loop
(that works good)
The Old Days WPE Certificates
SONY Tabletops
Clear Channel AM BCB List
TSCM (Bond...James Bond)
IBOC Woes
Tuners Transmatchers Couplers
EASTERN USA (ROMEO) |
UTC/GMT (ZULU) |
| NEW UTC ATOMIC Clock Console below -- Zero-Beat your shack's clock Your browser must allow 'Active Content' |
All the material presented on this Web site, graphic and text, is the property of the copyright holder and may not be used without written permission, except under section 107 of the US Copyright Laws, or for "personal use" only. No material may be used for
resale, (c) Robert W. Betts.
resale, (c) Robert W. Betts.
<-----NOT MANY LEFT!!!
So all it takes is some cash, a few electronic parts,
basic tools, lots of thought, and a tremendous
amount of understanding from whoever is your
physical, moral, emotional, and intellectual
custodian, keeper, master, boss, and/or supervisor.
Mine is all that, and she also cooks, does the
laundry, and cleans the house - especially the rooms
I don't often use ... and she actually allows some of
this stuff in the family room!
I'm truly blessed!
basic tools, lots of thought, and a tremendous
amount of understanding from whoever is your
physical, moral, emotional, and intellectual
custodian, keeper, master, boss, and/or supervisor.
Mine is all that, and she also cooks, does the
laundry, and cleans the house - especially the rooms
I don't often use ... and she actually allows some of
this stuff in the family room!
I'm truly blessed!
<-----600+ pages ! UPDATED for 2010!!!
<-----Available spring 2010, depending on demand Temp out
<-----Several prototypes leftover from an agency contract Temp out
For Sale Limited quantity stuff - all very limited
| Buy SWL Stuff, Below Bottom of Page |
A good receiver, decent antenna(s), and an effective preselector. What more could an SWLer ask for? Well, there's always something MORE that we could use ... right?
I hope you enjoy this site. In time it's going to get fairly large - maybe there will be something that you can take from here to enhance the enjoyment of this hobby. - Bob, N1KPR
L@@K !!!
Do you want to build a
Radio Astronomy station?
How about SETI?
Maybe Earth-Moon-Earth [EME] Ham
Radio?
Great stuff -- going cheap !!!
Click here.
Do you want to build a
Radio Astronomy station?
How about SETI?
Maybe Earth-Moon-Earth [EME] Ham
Radio?
Great stuff -- going cheap !!!
Click here.
| Limited Stuff Limited time !!! Hurry, hurry, hurry... |
U P D A T E D |
N E W |
Power control for 9 rack mounted
devices, includes circuit breaker and
line monitor.
AC Power Line Filter with Volt and
Amp meters, filters EMP, RFI, surge,
hash, transients and other impulses.
Demodulator with four inputs from
receiver IF stages. Five forms of
detection including Syncronous AM,
Peak and Notch filtering.
Audio Control Console with preamp,
power amp, bandwidth contouring,
and Demod selectors, pre, post and
bus-level send/receive.
RF Preconditioner/Preselector with
filters from 20KHz through 35+MHz,
Input/Output selection, Preamp,
100KHz Marker, 10MHz Upconverter.
W-J 8718A with ISB and 5KHz to
30MHz coverage.
W-J DMS 105A-2 Demodulator for AM,
SSB, CW, multiple filter selections,
and passband tuning capability.
W-J 8718 MFP (microprocessor front
panel) with same capabilities as the
manual unit above.
devices, includes circuit breaker and
line monitor.
AC Power Line Filter with Volt and
Amp meters, filters EMP, RFI, surge,
hash, transients and other impulses.
Demodulator with four inputs from
receiver IF stages. Five forms of
detection including Syncronous AM,
Peak and Notch filtering.
Audio Control Console with preamp,
power amp, bandwidth contouring,
and Demod selectors, pre, post and
bus-level send/receive.
RF Preconditioner/Preselector with
filters from 20KHz through 35+MHz,
Input/Output selection, Preamp,
100KHz Marker, 10MHz Upconverter.
W-J 8718A with ISB and 5KHz to
30MHz coverage.
W-J DMS 105A-2 Demodulator for AM,
SSB, CW, multiple filter selections,
and passband tuning capability.
W-J 8718 MFP (microprocessor front
panel) with same capabilities as the
manual unit above.
Old Friends: If you are a fan of my old site that
used to be on Geocities, then you may be able
to view it in the Geocities Archives, here.
used to be on Geocities, then you may be able
to view it in the Geocities Archives, here.
| Check out my Youtube channel |
| Check out my Youtube channel |
| Check out my Youtube channel |
* * * MERCHANDISE * * *
---Code Book
---AM BC Log CD
Balun: 9:1 SWL & QRP
4-Way Antenna
Multicoupler
---Code Book
---AM BC Log CD
Balun: 9:1 SWL & QRP
4-Way Antenna
Multicoupler