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> Would your idea of "a weak element...in the transmitter" > account for the fact that after flying it a half-hour and > experiencing this problem deteriorating, when I landed > and shut down the engine, then transmissions were > immediately ok again? That is what is so weird to > me about this situation (and to the A&P). Linda, Humm, no. If it's immediately OK when you shut down the engine, then, well, we don't know enough. Questions: 1. Does the tower (or other plane) hear you a. loud but garbled? b. loud but staticy? c. clear but progressively weaker? d. clear but sometimes weak, sometimes strong? 2. Is the problem that the tower and other planes can't hear you when you are a. on the ground taxiing out for takeoff? b. in the pattern? c. at certain points in the pattern? d. outside the pattern? 3. Does the signal quality a. stay the same throughout the flight? b. slowly decay throughout the flight? c. get sometimes bad, sometimes better? d. relate to engine power level? (i.e. if you reduce power to idle, does it help?) 4. Any relationship in which way the plane is pointed relative to the tower? 5. Are you using an intercom? If so, is it a. Battery or aircraft powered? b. Fresh batteries? 5. Some very old radios like that don't handle modern (electret) microphones well. a. Have you tried a separate microphone? b. Have you tried a separate carbon or dynamic microphone? c. Are you using an old carbon microphone? If so, bang it on something a few times to loosen up the carbon granules. Your responses to #1, #2 and #3 will give us a lot more to go on. Ah, ain't debugging fun? Ed Burkhead http://edburkhead.com ed -at- edburkhead???.com (change -at- to @ and remove "???") ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm
