LA Contest Club

Hei,
Jeg har i litt over et år hatt gleden av å eie en AIM4170B. Dette er en impedansanalysator som måler komplekse impedanser mellom 100 kHz og 170 MHz, laget av og for amatører. Prisen er overkommelig! Jeg har ikke sett omtale av den her i landet tidligere, så her er en link: http://www.w5big.com/.

Dette er et supert instrument for trimming av antenner, men kan også brukes til å måle komponenter. Nøyaktigheten kan sammenliknes med profesjonelle instrumenter i 200k klassen!

Svein, - 3BO

Hei.

Nå har de kommet en ny modell, se her: http://www.w5big.com/vna2180.htm

The Vector Network Analyzer, VNA2180, measures impedance (magnitude and phase) and filter transmission in the range of 5 KHz to 180 MHz.

A PC is used to plot parameters, such as, impedance, SWR, Return Loss and S21.

Main Features:
Port A is equivalent to an antenna analyzer. (Similar to the AIM4170C).
Port B has a 50 ohm input impedance with return loss greater than 30dB.
Port B nominal dynamic range: 100dB up to 50MHz, 80dB up to 160MHz.
Programmable RF amplitude for Port A (+7 to -19 dBm).
Resistance and reactance measurements of antennas and discrete components
Impedance measurements through filters or networks
Markers for impedance scans and Smith charts
Parameters that can be plotted include:
Resistance and reactance for series or parallel equivalent circuits
SWR
Return loss
Impedance phase angle
Two port network transmission (S21, magnitude and phase)

Cable length, impedance, loss, and velocity factor
Distance to fault (open or short)
Smith chart displays (featuring phase rotation and zoom)
Band scan to check for interfering signals
Quartz crystal parameter measurements
Preprogrammed functions, such as tuning a ¼ WL stub, and many more
I/O expansion port for accessories (digital and analog)
Calibration loads are included
No internal adjustments
Optically isolated USB interface to PC

Og prisen er 1000 dollar.

73 de Roy / LA5KO