Two Tube Doerle

This radio uses two #30 tubes and operates on batteries. It has shortwave coverage in two bands, 4.8 to 7.5 MHz and 7.3 to 12.0 MHz using plug in coils
post 24 Dec 2021


Antenna Shortwave Links

39



Echelon-Log Beverages
Two Beverages are paralleled a short distance apart, and stepped one in front of the other, can be phased to remove unwanted rearward response

Experimental Short-wave
These circuits perform very well. However, I'm still experimenting

Ferrite coupler
This is a useful device for coupling an external antenna to a radio that has no antenna jack

Flag Pennant Ewe
These antennas work best when propagation time of signals along the horizontal wires matches propagation time of the wave in space around the antenna, and when the earth or a ground system below the antenna is good

Harmonically Related Antenna Broadcast Bands
These two pages describe the assembly and parts measurement of a 1/4 wavelength, end fed receivin

Antennas_manufacturers About Rtty mode Audio Recording Amplifiers Antennas Satellite Amateur Television ATV Aprs software Beacon Band Plan Ham Radio Capitals Europe DX cluster software

Italy provices

Italia-call-ham radio Italy provices Ham Radio Clubs Italy
EME Ham Radio Satellite Grid Software Ham shirts Ham radio Magazine Log Converter Software Logs Search Services Meteor scatter Microwave Mac Ham Radio Software Practice with the soldering Propagation Solar Cycle Power Supply PMR 466Mhz Packet Radio TNC
PSK31 software Prefix World Propagation prediction Qrp low power QSL Printing QRSS Amateur VLF operating Radio old Museum Radio portal Surplus radio Sstv Photo SWL Shortwave DX Radio Telegraph Morse code VHF Activit Web SDR

Radio transceiver

Icom 706 Icom 7000 Icom 9700 Icom 7851 Kenwood TS-850 Yaesu FT 817 Yaesu FT 857 Yaesu FT100 Yaesu FT 1000mp
10 m| 12 m| 15 m|
17 m 20 m| 2 m|
23 cm| 30 m| 40 m
6 m| 70 cm| 60 m| 80 m| 160 m| 136 khz| 630 m|
Bazooka
Beverage
Cb Antenna
Collinear
Cobweb
Delta Loop
Eh
End_fed antenna
EWE Antenna
Fan Dipole
Folded Dipole
G5RV
Halo
Helix
Hentenna
Hidden Antenna
Hf mobile
HexBeam
Isotron
Jpole
Loop
Log Periodic
Low Band Receiving
Moxon
Multiband
Morgain
Ocf Fed Dipole
Quad
Slot
Spiral antenna
Vertical
Vhf-Uhf-Shf
Wifi & Ghz
Windom
Wire
Yagi
Ant.Masts and mounts
Ant.Transmatch
Antenna_Analysis
Antenna Receiving
Antennas Shortwave
Antenna Switch
Balun Calculator Antenna
Contest Logging Software
Components-kit
Duplex
Dummy load
Feed Lines
Fiberglass tubing
Phased Array
Projects Homebrew
Software Antenna
Software Defined Radio
Swr Meter System of grounding
Theory Traps Tower
Sstv Software
Logging Software
Digital_Mode
HF_radio_modifications
Interface Radio
Memory_keyers
Microphone setting
PC sound Radio Interface
Pocket Pc Preaplifiers
Radio control
RF attenuator
Radio programming
Radio Transceivers
RF Filter
Spectrum_Analyzer
Tracking satellite
Voice Messages & Keyer