K9AY feeder with BPF
This revision is from 2017/08/01 22:31. You can Restore it.
- Quick Start Guide
- Main function
- Connector description
- Rload - checking the resistance
- Preamp BIAS - SET/check current and voltage
Interface device between computer and transceiver - accesses all controls, CAT and audio to PC.
ToDo
- Cable wiring circuits
Quick Start Guide
- K9AY LOOPs design - more size variants
- Connector description - RJ45 connector
Main function
Connector description
- There is standart RJ45 (ETHERNET) connector with shielding
- Connector PIN description:
- direction logic ( apply +12V for logic 1 )
Rload - checking the resistance
- Connect Ohm meter to this position and measure value vs input Rload VTL voltage - PIN 6 on RJ45 connector
Preamp BIAS - SET/check current and voltage
- connect Volte meter to GND and jumper JP1. Measure voltage ( PREAMP ON ), it should be more than 11V
- DISconnect jumper JP1 and connect mA meter on the pins ( 200mA scale is fine ). Turn with R4 multi-turt trimmer and set bias to 65 - 100mA. You can have a look at my measurements:
