Según el "Yahoo VNWA Reflector", parece que los KITs se han dejado de preparar desde el 30 de Noviembre de 2010 (supongo que temporalmente) del VNWA .., aunque, se siguen vendiendo montados y ajustados ??
"Updated: 6th December 2010
News - Ready Assembled and Tested USB-Controlled VNWA are currently shipped from stock within 7 working days after receipt of Paypal order.
VNWA Kits are discontinued from 30th November 2010 as announced on the VNWA reflector."
http://sdr-kits.net/VNWA/VNWA_Ordering.html El fichero de ayuda sigue estando en:
http://sdr-kits.net/DG8SAQ/VNWA/VNWA_HELP.pdf También tienen disponibles estos módulos ..
PAOKLT Si570 Standalone Low Noise Synthesized VFO kithttp://sdr-kits.net/PAOKLT/PAOKLT.htmlPAOKLT brief Specification -
- Coverage up to 1417 MHz depending on Si570 device fitted
- Tuning resolution in steps of 1 Hz, 10 Hz, 100 Hz etc
- 32 Memories in 2 banks of 16 Memories
- Supply Voltage +7V..+12V DC
- Kit with all parts including Rotary Encoder, PCB, Programmed AVR and 2 line x 16 Character backlit LCD Module
QRP2000 USB-Controlled Synthesizer Frequencies up to 810 MHz available KIT. http://www.sdr-kits.net/USB/USB_Descrip ... l#Orderingusa el conocido Si570
http://www.silabs.com/public/documents/ ... /si570.pdf"Stand Alone Operation supported: Synthesizer remembers last frequency entered, when not connected to PC
Three Power Supply options: USB powered by PC, or standalone operation from +5V Battery or +7 to +13.8V External Power Supply. Support of 2 CW inputs - Iambic Keyer (supported by Rocky V3.6)
Drivers are available for Windows 7 and Vista (32 and 64 bits) as well as Windows XP, 2000, ME and Windows 98.
Typical Use: Computer USB Controlled Local Oscillator for SoftRock V6.0 V6.1 and V6.2 RXTX Transceiver, RF Signal Generator or Test Oscillator, Local Oscillator for Homebrew Receiver or Receiver kit like SOFT66RF Receiver Kit, YU1LM Homebrew QRP Radio designs (DR2G) or Transmit Exciter like - Low Power QRSS Transmitter" Está usando el conocido Si570, los artÃculos fueron publicados en "Funk Amateur" y GQRP, y aporta gran información de los primeros prototipos, aplicaciones multi-sintetizador y de la instalación de USB virtuales (firmware AVR)..
http://www.mydarc.de/dg8saq/SI570/index.shtmlhttp://home.ict.nl/~fredkrom/pe0fko/SR- ... 0/#install También apunta a programas, publicaciones "kueRRePeras" (SPRAT 135 del GQRP) y grupos:
http://www.dxatlas.com/Rocky/ http://www.gqrp.com/tech.htm http://groups.yahoo.com/group/softrock40/ http://powersdr-sr40.sourceforge.net/