Wanted to buy, Dittel radio wiring harness

On Tuesday, September 10, 2019 at 11:10:11 AM UTC-4, 2G wrote:
On Monday, September 9, 2019 at 6:23:52 AM UTC-7, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
Chuck,

While making or buying a harness is an option, I think that you may be pursuing the wrong approach to your problem.

You have a problem in your glider. You want to set up a bench test rig.. This will only determine if the radio itself is ok or not. In my experience the radio itself doesn't fail - especially so with quality brands (Filser, Dittel, Becker, etc) but rather with wiring, power supply, antenna, etc. Bottom line: your intended approach probably won't determine where your problem is within the glider.

My suggestion is to first use the troubleshooting guidelines in my presentation http://aviation.derosaweb.net/presen...s/#transceiver and see where that gets you.

If you think the problem is with the radio then send it in to a qualified repair shop. Addresses and phone numbers are listed in my presentation.

Best of Luck,
John OHM Ω

A handy instrument to have is an SWR meter, and they are pretty cheap. This will show any faults in the antenna lead (the most likely wiring fault).

Tom

Thanks Tom, I'll look into it.

On Tuesday, September 10, 2019 at 9:39:04 AM UTC-7, wrote:
On Tuesday, September 10, 2019 at 11:10:11 AM UTC-4, 2G wrote:
On Monday, September 9, 2019 at 6:23:52 AM UTC-7, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
Chuck,

While making or buying a harness is an option, I think that you may be pursuing the wrong approach to your problem.

You have a problem in your glider. You want to set up a bench test rig. This will only determine if the radio itself is ok or not. In my experience the radio itself doesn't fail - especially so with quality brands (Filser, Dittel, Becker, etc) but rather with wiring, power supply, antenna, etc. Bottom line: your intended approach probably won't determine where your problem is within the glider.

My suggestion is to first use the troubleshooting guidelines in my presentation http://aviation.derosaweb.net/presen...s/#transceiver and see where that gets you.

If you think the problem is with the radio then send it in to a qualified repair shop. Addresses and phone numbers are listed in my presentation.

Best of Luck,
John OHM Ω

A handy instrument to have is an SWR meter, and they are pretty cheap. This will show any faults in the antenna lead (the most likely wiring fault).

Tom

Thanks Tom, I'll look into it.

Here is some more background on SWR:

http://www.antenna-theory.com/definitions/vswr.php
https://en.wikipedia.org/wiki/Standing_wave_ratio
https://www.youtube.com/watch?v=qSea5FjcTDE

One potential issue is how the antenna lead is connected to the radio. You must be able to disconnect this lead and connect it to the SWR meter. A patch cable then connects the SWR meter to the radio. Also note that an SWR meter, unlike a VSWR meter, will be able to measure transmitted power.

Tom

On Monday, September 9, 2019 at 9:23:52 AM UTC-4, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
Chuck,

While making or buying a harness is an option, I think that you may be pursuing the wrong approach to your problem.

You have a problem in your glider. You want to set up a bench test rig. This will only determine if the radio itself is ok or not. In my experience the radio itself doesn't fail - especially so with quality brands (Filser, Dittel, Becker, etc) but rather with wiring, power supply, antenna, etc. Bottom line: your intended approach probably won't determine where your problem is within the glider.

My suggestion is to first use the troubleshooting guidelines in my presentation http://aviation.derosaweb.net/presen...s/#transceiver and see where that gets you.

If you think the problem is with the radio then send it in to a qualified repair shop. Addresses and phone numbers are listed in my presentation.

Best of Luck,
John OHM Ω

Hi John,

Thanks for the information. I got the radio to work yesterday. I think I was plugging the mic into the wrong plug. Still need to do some more testing. Thanks for your help and very informative literature.