Features And Operation - Pacific Antenna Easy TR Switch Manual

Transistors and diodes
Q1 2N3906 (align flat to board outline with center pin away from flat)
Q2 BS170 (align flat to board outline with center pin away from flat)
D1 1N4148 (align band to board outline)
D2 1N4148 (align band to board outline)
Misc parts
K1 Axicom V23105 Relay, (only fits one way due to pin configuration)

Features and Operation

The TR switch provides switching between two separate sets of contacts to two separate output/input
pairs.
It will sense RF input on the TX inputs and switch at about 100mW of RF and can be used over a
frequency range of 160-6M and up to 100 Watts of RF under matched conditions.
Manual switching can be enabled by grounding pin 3 (B) of the control inputs (X1) and then grounding
pin 2 (K) to switch the relay manually.
If automated switching is not reliable on certain frequencies, the value of C1 may need to be adjusted
up or down. In general, increase C1 for lower frequency operation and decrease it for high frequency
use.
The supplied 47pF capacitor should work over most bands from 80-20M. The kit also includes a 22pF
and 100pF for improved performance on bands outside this range.
Easy TR Switch 20170209 5