Shortwave Radio
This site is a collection point for information, construction techniques, theory, and enjoyment of Shortwave Listening.
Site Map
=================
Audio Leveler
AMM-1 (soon)
EBS-1 Super AM Receiver
MTC-1 CONTROLLER
SYS-1 In Progress
EQA-1 EQ & Analyzer
Commercial AM/FM Tuner
HF, VHF, UHF Multicoupler
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
=================
Audio Leveler
AMM-1 (soon)
EBS-1 Super AM Receiver
MTC-1 CONTROLLER
SYS-1 In Progress
EQA-1 EQ & Analyzer
Commercial AM/FM Tuner
HF, VHF, UHF Multicoupler
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.
| Very Broadband 9:1 Receiving Balun Kit The Receive-only (shown) and we have added a Heavy-Duty version as well click here connector and hardware kit - Temp out |
For Sale Limited quantity stuff - all very limited
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.
be on Geocities, then you may be able to view it in the
Geocities Archives, here.
| My Youtube channel |
| Check out my Youtube channel |
| Check out my Youtube channel |
| Items below have been put on indefinite hold. See current items above. |
| Some Stuff for Sale |
9:1 Receive-only Antenna Transformer
Only 10 made -- act now.
Completely weatherproof: water, acid,
caustic, ozone, salt and UV resistant. The
transformer is wound on a special ferrite
toroid with 22 Ga magnet wire and potted
into the zinc housing with Marine Epoxy.
The unit is built to MIL-SPEC for portable
and field applications, and is now available
here for your permanent home installation.
These are so "over designed" that they can
tolerate several watts of transmitter power
(but, not warranted against that).
Rated for 20KHz through 30MHz+
Only 10 made -- act now.
Completely weatherproof: water, acid,
caustic, ozone, salt and UV resistant. The
transformer is wound on a special ferrite
toroid with 22 Ga magnet wire and potted
into the zinc housing with Marine Epoxy.
The unit is built to MIL-SPEC for portable
and field applications, and is now available
here for your permanent home installation.
These are so "over designed" that they can
tolerate several watts of transmitter power
(but, not warranted against that).
Rated for 20KHz through 30MHz+
These transformers are built with
the absolutely best quality
components;
Teflon/nickel SO239 connector,
gold plated screw terminals,
diecast zinc (not aluminum)
housing, marine epoxy potting
compound, stainless steel
hardware, and a very expensive
ferrite toroid core.
Our cost for the parts is almost
$42.00.
Our labor is about 2 1/2 hours each.
For a very limited time you can
have one of the ten that I've built
for $48.00 (+shipping, $5.00 in the
US).
the absolutely best quality
components;
Teflon/nickel SO239 connector,
gold plated screw terminals,
diecast zinc (not aluminum)
housing, marine epoxy potting
compound, stainless steel
hardware, and a very expensive
ferrite toroid core.
Our cost for the parts is almost
$42.00.
Our labor is about 2 1/2 hours each.
For a very limited time you can
have one of the ten that I've built
for $48.00 (+shipping, $5.00 in the
US).
If there is enough interest in this item, I will go into larger production quantities, but the cost will include my labor. At that time the cost will be in the $60.00 area.
Note to previous customers: If you purchased the raw Balun module from me in the past several years, rest assured that it was made with the exact same toroid
core and wires. It was no longer feasible for me to continue the "module-only" item, so I decided to incorporate the actual epoxy potting in a usable weatherproof
enclosure, rather than the bare potted module. Those sold for $28.00, so the added cost now covers the enclosure and connectors...that's the only difference.
Note to previous customers: If you purchased the raw Balun module from me in the past several years, rest assured that it was made with the exact same toroid
core and wires. It was no longer feasible for me to continue the "module-only" item, so I decided to incorporate the actual epoxy potting in a usable weatherproof
enclosure, rather than the bare potted module. Those sold for $28.00, so the added cost now covers the enclosure and connectors...that's the only difference.
| Think Radio Towers are a thing of beauty? |
| The items below have been redesigned. Please click here for current SWL Receiving Accessories |