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N2APB SDR Cube Transceiver  Vintage Radio (Wikipedia) American QRP Club Midnight Design Solutions 
Google NUE-PSK Digital Modem Glowbugs Web Page (W7EKB) NJ-QRP Club JUMA Kits 
QRZ SNA Glowbugs Info QRP ARCI QRP-Labs (Hans Summers)
AMRAD (Tacos) DDS-60 Glowbugs Web NorCal QRP Club Kanga US 
ARRL GPS Display Terminal (GDT) Boatanchors Four State QRP Group EleCraft
Elektor Micro908 Antenna Analyzer RadioBanter Lists G-QRP Club Kits and Parts 
Circuit Cellar NAT Antique Radio Forums North Georgia QRP (NOGA) QRP Kits  (Pacific Antenna)
Yahoo Groups HC908 VFO  Electric Radio Mag   The Parts Place (K5NWA)
eBay HC908 Daughtercard ER Mag Index Great Personal Project Pages Dan's Small Parts
PayPal BITX40 BAMA (Manuals) Loftur E. Jónasson TF3LJ Mike's Hard To Find Parts
Verizon Central SDR-Widget-Lite K2TQN Old radio Columns K5BCQ & K5JHF Kits  SDR-Kits
FaceBook  SoftRock Sales Heathkit Museum ZL2PD QRPme
LinkedIn  SoftRock Info   Talking Electronics on the Web QRP Guys
Chords  Softrock Drivers MEGA VINTAGE LINKS W5DOR Ye Olde Disk Shoppe
Mods.DK Charleston SDR Essential Vintage Radio Links VA3IUL Homebrew Circuit Ideas EMTECH
Old Time Radio Shows AA0ZZ EZKeyer  Antique Radio Lists (AC6V) W3PM WSPR American Morse
Monitoring Times Archives PIC-EL II & PIC-EL III    F6IDT projects MFJ Enterprises
  IQPro VFO and LNA/LPF AM SPECIALTY   Oak Hills Research
REFERENCE Elektor SDR  AMfone  (website) GOOD PERSONAL PAGES Ten-Tec
RF Cafe UHF Hybrid Synth Class E AM Forum W3FPR (K2 Projects)  Milestone Technologies
RF Academy KD1JV Tenna Dipper N6EV Glowbug Page Paul Harden NA5N Vectronics
Tonne Software Atmel Butterfly Projects The AM Window AA0ZZ Projects LDG Electronics
K8CU Technical Topics Balanced Line Tuner (BLT+) The ARRL Phone Operating & Activities WB6DHW Projects  Amateur Electronic Supply
Meter Builder (RF Pwr Meter) Switched Longwire Tuner (SLT)   QRP Homebuilder (VE7BPO) RF Connection (Joel)
Greg Adams' Filter & Design SW KA7EXM Power Meter VINTAGE PARTS VENDORS AL7FS  
EZNEC Antenna SW (W7EL) Elecraft KX1 Transceiver Radio Daze KD1JV Kits PARTS VENDORS
NEC2GO Elecraft K2 Transceiver Antique Radio Supply JF10ZL (Homebrew Projects) Digi-Key
Data Sheet Archive Elecraft T1 Tuner Surplus Sales of Nebraska K0JD (R2/T2 info) Mouser Electronics
L. B. Cebik, W4RNL   Vacuum Tube Supplies G3YCC Newark Electronics
  SPECIALTY LINKS Antique Electronics Supply K7QO Farnell
PIC-A-STAR TAPR Nationwide Radio & Eq. WE6W Arrow Electronics
PIC-A-STAR DSP XCVR Project AntenneX Magazine Bob's Antique Radio & Parts K8IQY (2N2/40, 2N2/15) Future Electronics
Glenn's PCBs & Construction Longwave Club of America   SM0VPO Allied Electronics
TrxAVR-Picastar RF Cafe - Conversion Tables GOOD BOATANCHOR PROJECTS JF1OZL Jameco
Glenn's TrxAVR Construction Spectrum Analyzer HBR-16 Receiver Todd K4MSW FAR Circuits
User Group Technical Bibliographies SoftRock + R-390A 7N3WVM Radio Shack
Builder Group W7ZOI Spectrum Analyzer Greg Latta AA8V K1TTT  (tech reference) ByteMark
  Steve Hageman's Workshop Emmitt's Fix-It Shop (HRO-60 + HBT-90) S56AL (projects) Texas Instruments
POPULAR LISTS & BLOGS Mods for Commercial Rig HBR-16 by Joe K8KEJ VK5BR Philips Semiconductors
Time Nuts   AC-1 Transmitter   Fair Radio Sales
NUE-PSK Digital Modem GPS Class E AM Transmitter DSP DEVELOPMENT Barker & Williamson
SDR Cube Transceiver  DIY GPS Receiver K1KBW KK7P DSPx Project International Crystal
Softrock Disciplined GPS Clock (ZL1BPU) WA1QIX "DSP10" Software Defined Radio NTE Electronics
Mobo GPS Stabilised 10 MHZ Osc (G3RUH)   Analog Devices ADSP-2189M Radio Adventures
SDR-Widget Simple GPS Stabilized 10 MHz Osc (G3RUH) YAESU FT-817 LINKS EME, SETI, DSP Vector Electronics
UHFSDR CNS Systems (professional) KA7OEI FT-817 Pages Bibliography of DSP Textboooks Harbor Freight Tools
HBR Brook Shera's GPS Projects W4RT Electronics   Lashen Electronics
NJQRP Simplest GPS-DO (Andrew Talbot) Yaesu FT-817 Website SOLDERSMOKE  
AQRP   K6XX Technical Specs Page Podcasts  
Universal VFO Controller LeapSecond     Parts Express
HF Pack Doug Hogarth "Niceties" SCHEMATIC CAPTURE PSK-31 Goldmine Electronics
DDS VFO Time & Freq Measurement (Ackerman) Circard (Holophase) Eduardo EA2BAJ Page All Electronics
Elecraft Fundamentals (NIST) Eagle (CadSoft) PSKcore DLL Project B.G.Micro
HamSDR Timing (KO4BB) DipTrace WM2U Marlin P. Jones (MPJ)
PSK31 Brook Clarke's Time & Freq ExpressPCB Treatise on PSK by J. Forrer  
R2PRO KO4BB WikiPage (great)   WinPSK  UNIQUE PARTS
dsPIC Books Small Parts PCB FAB SHOPS  
Butternut Antennas NIST Time & Frequency NAPPCO Fastener MyRO PCB (prod)  
SDR-1000 Forum Bill Riley Publications Online Metals PCBnet (proto)  
  GPS Time   4PCB (proto)  
    METALS Alberta Printed Circuits  
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    MicroRAX Bay Area Circuits  
    Rockler Sunstone PCBs  
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    OrangeAluminum SHOP TOOLS  
      Harbor Freight  
    CABINETS MicroMark  
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ast updated:  March 24, 2017