Hi Guys,
Because of European laws, we must now all install VHF-radio's with 8.33 KHz channel spacing so I managed to buy a used Garmin GTR225 radio and also purchased a GMA-240 audio panel. The idea was to use the GTR225 as COM1 and my existing SL30 as COM2.
Installed an extra VHF antenna and built a new wiring loom.
It seems to work relatively fine except for two things;
1) I cannot transmit from the pilot position. Most likely I misplaced one of the pins in one of the connectors. Can be cured fairly easily I guess;
2) When transmitting from the co-pilots position I hear a rather strong background whistle. Doesn't make any difference whether using COM1 (the GTR225) or COM2 (the SL30). Playing with volume and squelch doesn't cure it and yes, I am not listening out on the other radio on the same frequency nor do I have a speaker that could play a roll. Any ideas how to get rid of this annoying whistle ??
Thanks in advance.
Because of European laws, we must now all install VHF-radio's with 8.33 KHz channel spacing so I managed to buy a used Garmin GTR225 radio and also purchased a GMA-240 audio panel. The idea was to use the GTR225 as COM1 and my existing SL30 as COM2.
Installed an extra VHF antenna and built a new wiring loom.
It seems to work relatively fine except for two things;
1) I cannot transmit from the pilot position. Most likely I misplaced one of the pins in one of the connectors. Can be cured fairly easily I guess;
2) When transmitting from the co-pilots position I hear a rather strong background whistle. Doesn't make any difference whether using COM1 (the GTR225) or COM2 (the SL30). Playing with volume and squelch doesn't cure it and yes, I am not listening out on the other radio on the same frequency nor do I have a speaker that could play a roll. Any ideas how to get rid of this annoying whistle ??
Thanks in advance.