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K8CX QSL CARD GALLERY - QSL Cards from ALL 338 DXCC Entities, deleted countries QSL Cards, other interesting cards

JH3GBD's QSL Card Gallery - QSL cards collection from Japan

Old QSL Card Gallery - Some very olds QSL cards

Clipperton DX Club QSL Gallery - QSL cards from dx peditions sponsored by CDXC

W7HR QSL Card Gallery

VE3TMG - QSL Card Gallery - A full page with QSL cards

HL2WA - QSL Card Collection - Received QSL Cards

Historical QSL Cards - QSL cards from the sixties by HE9FYE

CT1FUI Radio Blog - CT1FUI - Amateur Radio from Portugal , QSL card collection from 90's

Cards by Stan SQ8X - QSL card samples by SQ8X

The G4UZN Historic QSL Collection - QSL amateur radio history. A large collection of historic QSL Cards from 1920's and from rare stations

US Interface - One USB cable to your computer does it all include high speed sound card and audio monitor, works with most of remote control software.

KB3IFH QSL Cards Priority listing - Amatuer Radio QSL Cards. Full Color QSL and Eyeball Cards

KB3IFH QSL Cards - QSL Printer shop, products include Photo QSL cards, Eyeball cards, and State QSL Cards, based in Hampstead, MD USA

OK1DRQ QSL Cards - QSL Card printer in Plzen Check Republic

BCL QSL Gallery - A rich QSL Card collection from a BCL Listener

DTMF Decoder - DTMF decoder program that uses the sound card and FFT to decode DTMF by KB5RYO

Ham Fax - HamFax is an application for sending and receiving facsimiles in amateur radio and for receiving public facsimile broadcasts like weather maps. Supported interfaces are sound cards and the SCS-PTCII from Special Communication Systems.

QslDesignAndPrint - a program to design and print QSL cards on your computer, as well as design QSL cards for printing by commercial printers. This program overcomes many of the limitations that are present in other QSL design and print programs and methods.

RF Radiation and Electromagnetic Field Safety - Preprinted from the 1997 ARRL Handbook for Radio Amateurs. Thermal Effects of RF Energy, Safe Exposure Levels, Cardiac Pacemakers and RF Safety, Determining RF Power Density

SDR-908 Portable SDR - The SDR-908 is a software defined radio designed specifically for portable use, without the bother of being tethered to a PC or soundcard for the modulation/demodulation processing performed in this kind of radio.

Interface for TM255 and TM455 - PTT and souncard interface for the kenwood TM255 and TM455

Digital modes interface - PC Sound card to radio interface capable to support two transceivers in Spanish

RTTY PSK31 SSTV Sound Card Interfacing - Sound Card Interfacing for RTTY, PSK31, and SSTV

PSK31 interface - Radio to soundcard schematic interface by VK6PG