radio diagnosis

[[email protected]]

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

[JS[_5_]]

On Thursday, February 1, 2018 at 9:29:49 AM UTC-8, 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

Not enough information.

Did they work and then stop, or does the problem exist since a recent installation?
What are the radios?
What are the microphones?
To which pins are they wired?

As a start, check the wiring harness in each for correct wiring to the pins for the type of microphone used, and check the radio setup for the selected microphone.

Jim

[[email protected]]

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.

[OHM Ω http://aviation.derosaweb.net]

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/presentations/documents/Transceiver_Troubleshooting.pdf

[AS]

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'

[Tim Newport-Peace[_4_]]

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!

[Charlie M. (UH & 002 owner/pilot)]

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. ;-)

[[email protected]]

The Dittel FSG70/72 has a well known problem with the PTT relay that causes this exact problem...just google it if so, cheers

[krasw]

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?