Can someone else with a VX-8DR, GPS module, and the CT-136 (on-body GPS adapter) tune up 147.320 and see if they are getting a strong interference that goes away when you unplug the CT-136/GPS?
My VX8-DR has an S9 signal on that frequency only when the GPS is connected. It goes away the instant I unplug the GPS and comes back almost immediately when it is plugged in. Its a shame too because a nearby repeater is on 147.315 and its near unusable because of the interference.
I ask because maybe there is a chance its something that can be solved with an antenna swap so if you don't have the interference, let me know what antenna you're using. I have not tried it on the stock antenna yet, but the signal is strongest on my Comet SMA-503 and only slightly less on my Diamond SRHF10.
My VX8-DR has an S9 signal on that frequency only when the GPS is connected. It goes away the instant I unplug the GPS and comes back almost immediately when it is plugged in. Its a shame too because a nearby repeater is on 147.315 and its near unusable because of the interference.
I ask because maybe there is a chance its something that can be solved with an antenna swap so if you don't have the interference, let me know what antenna you're using. I have not tried it on the stock antenna yet, but the signal is strongest on my Comet SMA-503 and only slightly less on my Diamond SRHF10.
