I'm just after confirmation that what I'm about to do sounds right to the more experienced here (please!)..
I've currently have a TinyTrak3 connected to a Maxon 1 watt radio for playing with APRS. It all seems to work fine, except the range is a bit average.
As a learning experience, I figured instead of just getting a more powerful radio, I'd build a low power VHF amp from a kit to see how it works. I've ordered an 8 watt 2m amp from Minikits
. After reading through the instructions (twice
), I noticed in the specs that the PA module has a maximum Pin
of 40mW. So, I figured I'd need to put in an attenuator to reduce the 1W from the radio down to <40mW for the amp.
If I've done all my calculations right, I'm looking for ~6dB of attenuation, which I can get by making a Pi attenuator using 150 ohm resistors for Shunt In/Shunt Out, and a 38 ohm resistor for the series, which will give me a Pin
of somewhere near 30mW.
Does that sound right to anyone else? Anything else I should look for/other recommendations?