Wideband Amplifier Project - VE2AZXve2azx.net/technical/WideBandAmp.pdf · 2019. 9. 26. ·...
Transcript of Wideband Amplifier Project - VE2AZXve2azx.net/technical/WideBandAmp.pdf · 2019. 9. 26. ·...
Wideband Amplifier Project
INPUT provides:- 1 MΩ AC/DC (14 pF)- Allows using scope X10 probe- 50 Ω / GND (input open)
- DC Offset adjustmenton X10 output
- 150 mA max @ 12V- Separate 50 Ω outputs
for X1 and X10
J. Audet VE2AZXve2azx.net
INPUT OUTPUTS
View of assembled PCBNote the two 50Ω striplines at the outputs
Hammond 1455J case used, top cover removed.
NOTE: I have a few PCBs available for sale, along with decals. $12 US. Contact me.
Input Z = 50 ΩIN/OUT Impedance = 50Ω
(0 dB)
Input Z = 50 ΩIN/OUT Impedance = 50Ω
(20 dB)
1 dB compression as measured with VNAOutput levels measured with HP468A power meter /HP8481A sensor
Hammond 1590J case used
Using a fully shielded enclosure to improve immunity to RFI
BNC Jacks:A32231-ND
Note: 330 pF cap 0805bypass cap installed across contacts
50Ω
GND
DC
AC
SW1a bSW2
J6 J7 J5 J4
SWITCH Wiring - Rear view
Wiring of the switches
Notes-Both switchessub-mini type
- S1 type:DPDT center off