Wednesday, December 28, 2011

SnaLY-160 (Scalar USB network analyzer)













Hardware used here is a mix of AD9951 (based on Pick a Star team‘s DDS VFO), Atmega8 firmware parts using libusb and DG8SAQ code. LPF by DL5MGD . Detector is taken from AD8307 datasheet.







Technical specification:
OS: WinXp, Vista, Windows7 (64 ir 32 bit)
Sweep range: 100 KHz – 160 MHz.
Generator range: 10 KHz – 160 MHz.
Output ~1,7 V pp on 50 Ohm load
Achievable measurement range -75... +17dBm (limited by AD8307 and construction)
Powered directly from USB (~70mA)
Software calibration function for linearization.



This tool is completely freeware with source code available for controller firmware and desktop software. Driver installation instruction.

Shortly about software.
I tried to make software intuitive – one can get used to it within minutes :-)
There are two markers controlled by left or right mouse buttons.
If mouse pointer is placed on dB window edge – amplitude measuring range may be expanded/collapsed using mouse wheel.


If you have questions/comments feel free contacting me: LY3H.Zilvinas@gmail.com
Happy exploring (building/using)

73! Ċ½ilvinas LY3H

Thank LY3LP, LY2SS

Wednesday, December 21, 2011

Saturday, November 26, 2011

28 MHz VXO - PTO

Is very good , KE7HR Paul R. Jorgenson -five crystal ,VXO . VXO my work on 28,2 MHZ

Wednesday, November 23, 2011

Tuesday, November 8, 2011

Sunday, November 6, 2011

Monday, October 24, 2011

Monday, August 29, 2011

Sunday, August 28, 2011

Generator 3w 6v

Bicycle generator "Union" 3w 6v . Voltage multiplied by 4 times

Saturday, August 20, 2011

"Heavy" gigahertzs



Tried catch the internet - no luck. Will do solar collector. If it fails too - I'll make a table from it hihi

Tuesday, August 16, 2011

Simple 2,8w linear generator

700 turns 0,2mm , coil 2,5cm x 1,5 x 1cm ,neodymium shiver, multiplier,the result about 2,8w output. Using wind turbine , can throw int the yard or garde all night for free .

Thursday, August 4, 2011

Linear generator 16v

Two 3000 winding coils, wire 0,2mm , 5cm x 5cm x 1cm neodymium magnet. 4v multiplied by four, the result is +16v about 0,7 A.



Saturday, July 30, 2011

CD wind turbine with Epson stepper

Epson stepper motor from a broken printer ,capacitors and diodes from an old computer. CD wind turbine turns on very low wind, very quietly, the LED light up brightly in the dark. Green energy cost 0 USD.


Friday, July 1, 2011

Sunday, June 26, 2011

Thursday, June 16, 2011

Saturday, May 28, 2011

TDA 7052 28MHz receiver

27 May, with 5meter wire, heard LA3G? SP...

Friday, May 20, 2011

The 50MHz RX "MINIMALIST"

Fits like a tone control transmitter, frequency meter...

Wednesday, May 18, 2011

50,06 - 50,120 MHz RX

This is my first attempt to draw schematics with gEDA (Linux). Overall I am very satisfied with the results.





Monday, April 18, 2011

28 MHz 1w QRP transmitter

Nice emitter manipulation of the T1. T1-T3 any 150mc transistor. T4 is 1w, or two 2n2222 in parallel. T50-6 rings, perpendicular. If more power needed one can connect NB6M QRP "gallon".

Friday, March 18, 2011

28,096MHz mini beacon

This one can be heard well within 5 meters.

Tuesday, March 15, 2011

432MHz - 144MHz mini beacon

On 144 MHz it is heard well within 4 meters distance. 432MHz beacon is heard good about 30cm. For easy converters/receivers testing.