One probable cause is paging station or the like kind causing external interference, which can be verified by bundling all the Rx antenna wire into a small holder of equal volume to the wire. Only exception is the Tx antenna shall be extended fully for this test. Range test them. If test positive, verify that a second time by a regular range test but in/out of town beyond the influence of the suspect station. (the bundling or de/attach of Rx antenna is to provide maximum possible attenuation to the unwanted station(s) intended to exclude them within the problem equation). YK Chan in Seattle RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
