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