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Re: Possibly WTB MX300 Stacey Morris #523151 12/31/16 07:58 PM
Joined: Dec 2016 Posts: 756 Likes: 3 Maine Mark Stevens Member/750+posts
Mark Stevens Member/750+posts Joined: Dec 2016 Posts: 756 Likes: 3 Maine	Originally Posted by Stacey_Morris I know you said funds are limited, Mark, but you may want to have an avionics shop take a quick look. They can pull it out (or you could) and bench check it. Probably wouldn't cost a lot and would let you know for sure if there is something wrong with it and if so, whether or not it could be easily fixed. It might just be a fuse or something like that, either internal to the radio or in the airplane. Our #2 NAV/COM fuse sometimes acts up even though the fuse it good. I can turn the fuse holder and it usually starts working. I would hate to see you spend money for a new radio when you don't really need one (even though I realize you may want a more modern radio). The second NAV/COM may not get used a whole lot. That's a great idea. I am also (per suggestion) going to swap COM 1 and 2 around to see if it's the tray/wiring. I just need to stop flying it and do some troubleshooting! 1977 Cessna 150M N704JQ (Sold) Based at KSFM States I have landed in N704JQ

Re: Possibly WTB MX300 #523152 12/31/16 08:00 PM
Joined: Dec 2016 Posts: 756 Likes: 3 Maine Mark Stevens Member/750+posts
Mark Stevens Member/750+posts Joined: Dec 2016 Posts: 756 Likes: 3 Maine	Originally Posted by Swordfish The RT328 has relays. It's possible an avionics repairman can tinker with it. Your installation could be wrong. Turn up the squelch and you think it's dead. Thanks, I will check. Squelch knob didn't help anything. 1977 Cessna 150M N704JQ (Sold) Based at KSFM States I have landed in N704JQ

Re: Possibly WTB MX300 Mark Stevens #523263 01/01/17 11:05 PM
Joined: Dec 2016 Posts: 756 Likes: 3 Maine Mark Stevens Member/750+posts
Mark Stevens Member/750+posts Joined: Dec 2016 Posts: 756 Likes: 3 Maine	Good news! On the advice of Lyle, I pulled the radio out today in order to swap the RT328T and the MX300. Before I pulled the MX I took a look at the 328T pins on the back. Turns out there was a bent pin. I straightened out the pin and re-installed the radio. Lo and behold the quick com check with my handheld worked great. I couldn't check NAV because I was in the hangar and there was no way to pick up the VOR. I will do a proper check on both COM and NAV (hopefully) tomorrow. The RT328T is not a long term solution for me but it looks like I at least have dual COM's again. Thanks everybody for the suggestions. 1977 Cessna 150M N704JQ (Sold) Based at KSFM States I have landed in N704JQ

Re: Possibly WTB MX300 Mark Stevens #523269 01/01/17 11:49 PM
Joined: Sep 2006 Posts: 8,775 Likes: 300 West Memphis, AR S Stacey Morris Member/7500+posts
Stacey Morris Member/7500+posts S Joined: Sep 2006 Posts: 8,775 Likes: 300 West Memphis, AR	Good news, Mark. At least now you have some breathing room! I had quite a bit of static in my MX 300. I pulled the radio out and used contact cleaner. I had to use a soda straw to clean the back of the tray, but it worked great (knock on wood)! I hope both the COM and NAV on your older radio work like a charm.

Re: Possibly WTB MX300 Mark Stevens #523271 01/01/17 11:51 PM
Joined: Mar 2004 Posts: 15,909 Likes: 1004 Ma. Ct. RI area Ron Stewart Member/15,000 posts
Ron Stewart Member/15,000 posts Joined: Mar 2004 Posts: 15,909 Likes: 1004 Ma. Ct. RI area	Originally Posted by Mark Stevens Good news! Your membership to this club just paid for it self! Ron Stewart N5282B KSFZ

Re: Possibly WTB MX300 Ron Stewart #523291 01/02/17 02:58 AM
Joined: Jun 2004 Posts: 35,592 Likes: 566 I'm lost.. Ed Pataky DA POOBS Member with 30,000+ posts!!
Ed Pataky DA POOBS Member with 30,000+ posts!! Joined: Jun 2004 Posts: 35,592 Likes: 566 I'm lost..	YAY!!! Man, is that a relief, or what?! Good on ya, Mark!. [animatedimages.org] Imagine a united world. Join the Popular Front for the Reunification of Gondwanaland.

Re: Possibly WTB MX300 Mark Stevens #523317 01/02/17 12:48 PM
Joined: Jul 2004 Posts: 21,835 Likes: 2299 Rogers, Arkansas Jim Hillabrand Member/20,000 posts
Jim Hillabrand Member/20,000 posts Joined: Jul 2004 Posts: 21,835 Likes: 2299 Rogers, Arkansas	That's good news, Mark.......great suggestion, Lyle. I'll always default to TD's well known suggestion: DO EASY FIRST. Jim Cessna 150/150, N2259M - Mighty Mouse

Re: Possibly WTB MX300 Mark Stevens #523484 01/03/17 11:41 PM
Joined: Dec 2016 Posts: 756 Likes: 3 Maine Mark Stevens Member/750+posts
Mark Stevens Member/750+posts Joined: Dec 2016 Posts: 756 Likes: 3 Maine	Well the COM worked great. Seems to work as good as the MX300 in terms of range and clarity. The NAV did not work at all. OBS wouldn't budge and I couldn't pick up any VOR ID's. I need to do a little more investigating on the NAV side but I'm happy to have the COM working. I don't have an immediate need for dual VOR's anyway. 1977 Cessna 150M N704JQ (Sold) Based at KSFM States I have landed in N704JQ

Re: Possibly WTB MX300 Mark Stevens #523485 01/03/17 11:41 PM
Joined: Dec 2016 Posts: 756 Likes: 3 Maine Mark Stevens Member/750+posts
Mark Stevens Member/750+posts Joined: Dec 2016 Posts: 756 Likes: 3 Maine	P.S. This thread might need to be moved to technical questions! 1977 Cessna 150M N704JQ (Sold) Based at KSFM States I have landed in N704JQ

Re: Possibly WTB MX300 Mark Stevens #525145 01/20/17 01:38 AM
Joined: Apr 2010 Posts: 10 RI Deborah Michael Member
Deborah Michael Member Joined: Apr 2010 Posts: 10 RI	You can also call TKM and see if they have a MX 300 for sale. We bought one from them a couple of years ago. If I remember correctly, they gave us a good deal because it was a return and they couldn't sell it as new. Deb Michael

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