Re: One more problem U3S WSPR


haroldbone@...
 

Harold
g3ehq

Hi John
you can test your relays by removing relay board and bandpass filters,do not attempt connections to 10 pin conn.wire a lead to cathode of any diode
to 5v connect a Wire to the anode of the diode of the relay you want to test leave this wire disconnected and check for 5v on each relay if ok ground 
anode wire the relay will operate if you want to measure the current connect mA meter in series with earth lead 28mA is normal,
Connect ohm meter to check correct operation if ok you have connected to the common bus which connects RF from bandpass filters,it's a job which
is worth doing on a new build.
Hope this helps
Harold

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