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#1
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radio diagnosis
On Thursday, February 1, 2018 at 12:29:49 PM UTC-5, wrote:
We have to gliders at our club with similar radio problems. Neither have the same setup/hardware. Both can receive fine. When you press the Push To Talk button other radios hear the click, but no voice. So what can we learn from this? I don't know if this is more likely a microphone problem, a transmitter problem, could be the PTT button too, etc? I didn't have a voltmeter to verify that the battery was strong enough, but can do that next time. what should our next step be? Chris These radios are still installed the the gliders, and as far as we know they work months ago and we don't know what changed, and unaware of any wiring changes since then. It is possible that some connection degraded. One of the radios is a Dittel FSG 50. |
#2
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radio diagnosis
Troubleshooting transceiver issues are the worst. Heck, it could have been a nearby lightning strike if both radios went out at the same time.
Take a look at this troubleshooting guide I put together. Who knows it might even help! Best of luck, John http://aviation.derosaweb.net/presen...leshooting.pdf |
#3
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radio diagnosis
On Thursday, February 1, 2018 at 1:08:41 PM UTC-5, wrote:
On Thursday, February 1, 2018 at 12:29:49 PM UTC-5, wrote: We have to gliders at our club with similar radio problems. Neither have the same setup/hardware. Both can receive fine. When you press the Push To Talk button other radios hear the click, but no voice. So what can we learn from this? I don't know if this is more likely a microphone problem, a transmitter problem, could be the PTT button too, etc? I didn't have a voltmeter to verify that the battery was strong enough, but can do that next time. what should our next step be? Chris These radios are still installed the the gliders, and as far as we know they work months ago and we don't know what changed, and unaware of any wiring changes since then. It is possible that some connection degraded. One of the radios is a Dittel FSG 50. Go here http://www.segelflug.de/osclass/ and enter 'FSG50' For 60 Euros plus maybe another 40 for shipping (total of $125), you can have a replacement including the mounting frame in time for the soaring season. How valuable is your time? Uli 'AS' |
#4
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radio diagnosis
At 05:25 03 February 2018, AS wrote:
On Thursday, February 1, 2018 at 1:08:41 PM UTC-5, wrote: On Thursday, February 1, 2018 at 12:29:49 PM UTC-5, wrote: We have to gliders at our club with similar radio problems. Neither have the same setup/hardware. Both can receive fine. When you press the Push To Talk button other radios hear the click, but no voice. So what can we learn from this? I don't know if this is more likely a microphone problem, a transmitter problem, could be the PTT button too, etc? I didn't have a voltmeter to verify that the battery was strong enough, but can do that next time. what should our next step be? Chris These radios are still installed the the gliders, and as far as we know they work months ago and we don't know what changed, and unaware of any wiring changes since then. It is possible that some connection degraded. One of the radios is a Dittel FSG 50. Go here http://www.segelflug.de/osclass/ and enter 'FSG50' For 60 Euros plus maybe another 40 for shipping (total of $125), you can have a replacement including the mounting frame in time for the soaring season. How valuable is your time? Uli 'AS' But only helps if the problem lies in the radio. At this time of year, there might be just one word for the problem - DAMP! If there is one or more connections between the radio and the battery that has gone high resistance due to corrosion, it could be passing enough current for Receive (55 milli-amps), but not transmit (1.5Amps), when it breaks down. you need to measure the voltage at the radio during TX, not at the battery. It is also not unknown for damp within the radio to cause problems with the processor. Blame the weather! |
#5
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radio diagnosis
Agreed.
In a radio, receive is low load, transmit is a higher load. Size of feed wires and quality of connection can make a difference here. Crimp connectors with some solder and/or dielectric grease can help. A "U" shaped crimp is better than an eyeball/football crimp. Assuming Nadler will come in and argue, whatever........ Yes, measure battery voltage AT the radio during transmit to see if you have a big drop in power/voltage. If you do, work your way up the power feed to find where the voltage changes, then fix the connection. Good idea previously on checking at the radio. ;-) |
#6
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radio diagnosis
On Thursday, 1 February 2018 20:08:41 UTC+2, wrote:
One of the radios is a Dittel FSG 50. Maybe vintage radio hobbyist could help, does it have vacuun tubes or morse code transmitter? Or just buy newer, less than 40 years old radio? |
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