Cumulus Support

I have still got my F.O. 1080 down for mods etc and have a multimeter (Fluke 863) clipped up to take a few readings.

Battery voltage is 3.45 volts from 2 X RAM (rechargeable alkaline manganese) batteries with 5" square solar cell. Batteries are fitted inside the solar cell housing and I have soldered a flying lead to the terminals inside the transmitter.

I did a few measurements using "peak hold", here are the results----

1. Initialise (when batteries first connected) and the long red blink of the LED 26mA

2. "Dormant" period between TX pulses 0.028mA

3. "Polling/pre-transmit" occurs about 1 second before data transmit 4mA

4. Transmit (LED blinks on) about 1/2 second 7mA

I measured mine WS-8681 and getting average of 3.7mA (average is calculated over few hours). Looks like I'm the "lucky" one with "faulty resistor" board :/

I was having heaps of issues with my WH1091 with battery life, got the s^*&its with at and bought a transformer that runs the correct voltage (3.0v I think) and removed the batteries all together from the transmitter, ran the wiring through the roof tiles and to a power point in the roof. Works fine now, havent had a blackout yet though !!