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JamesB
First Sergeant
Gender: Male
Location: Near Seattle, WA; USA
Registered: Oct 2006
Status: Offline
Posts: 257
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 Posted Thursday, August 6, 2009 @ 10:07 AM
Problem: the warning buzzer in my RF5B was creating such interference in my radios, I couldn't hear the tower or other aircraft.
The buzzer itself looks like a miniature door bell with a electro magnet and contacts.
Solution: about $5 from Radio Shack, replace the electro-mechanical buzzer with a piezo electric buzzer. The sound is loud enough to be heard through regular headsets but does not interfere with radio reception. An easy 2-wire connection.
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Jorgen
Captain
Gender: Male
Location: Lund, Sweden
Registered: Apr 2007
Status: Offline
Posts: 834
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Posted Thursday, August 6, 2009 @ 03:48 PM
Good tip James,
but you re-did your wiring, didn´t you? All the rest of us who didn´t get around to doing that will have a different solution/problem- the buzzers won´t work at all because of broken/tatty wiring.
May the 4´s be with you/ Jörgen
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JamesB
First Sergeant
Gender: Male
Location: Near Seattle, WA; USA
Registered: Oct 2006
Status: Offline
Posts: 257
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Posted Friday, August 7, 2009 @ 10:52 AM
The original wires worked. Just attached the new piezo horn to the original wires that fed the buzzer.
If you are asking has the RF5B been rewired, no. It has the original wiring. I have gone through a few of the contacts, removed, cleaned & reattached.
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chucknugent
Corporal
Gender: Male
Location: Portland, Oregon
Registered: May 2009
Status: Offline
Posts: 20
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Posted Friday, August 21, 2009 @ 01:27 AM
James
You going to use the old buzzer? Mine broke, and Ihave already drilled my new panel for the countersunk mounting screw. I can use a piezo 273-059 but space is limited behind the panel. There is only so much you can stuff above the prop handle. So far I have a B-400 vero,MGL E-3, MGL AT-1, Becker comm., Becker transponder, old VDO tach, Winter airspeed, altimeter, and oh yes the Dynon D6 EFIS.
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JamesB
First Sergeant
Gender: Male
Location: Near Seattle, WA; USA
Registered: Oct 2006
Status: Offline
Posts: 257
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Posted Friday, August 21, 2009 @ 10:22 AM
No, I won't reuse the old buzzer. I'm not sure at the moment if it would be easy to reuse, I haven't checked to see just how the A&P cut it out. The piezo (for me) is dramatically superior. No more radio interference.
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