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  #21  
Old 10-20-2021, 08:39 PM
WiscoAV8tor WiscoAV8tor is offline
 
Join Date: Dec 2017
Location: Burlington, Wisconsin
Posts: 17
Default GTR200 issue

Well, Steve and and I have been comparing notes and we have the exact same problem. Oddly enough we just shared pictures of our cockpit configurations and they are almost identical. We both are running a GDU460, with a stack in the middle with a autopilot controller on top (507), the GTR200 in the middle, and a Garmin 375 on the bottom. Single radio setup with the GTR as the intercom. Ive been in contact a little bit with Garmin but so far no luck. If anyone else out there is having the same issue please contact me or Steve T. We would love to compare notes and get to the bottom of this.
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  #22  
Old 10-21-2021, 08:51 AM
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Snowflake Snowflake is offline
 
Join Date: Oct 2009
Location: Sidney, BC, Canada
Posts: 4,279
Default

It looks like you've tried everything we've all suggested, so here's something even further "out there" to try... How about reorganizing where the radio is with respect to everything else in the panel? i.e. pull the tray, drop it down below everything and (temporarily) hang it there with a webbing strap or something. i.e. get it away from the rest of your avionics.

This requires that you have enough of a service loop in your wiring to accomplish this, of course.

Alternately, maybe pulling other things nearby out instead? What comes out easily? the Garmin 375, maybe?

And to be clear, what I think you'd be testing by doing this is the possibility that there is some RF somewhere leaking between devices and causing issues.
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Rob Prior
1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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  #23  
Old 10-21-2021, 08:59 AM
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Walt Walt is online now
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 6,353
Default

Maybe try turning bluetooth off.
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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 2000+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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  #24  
Old 10-21-2021, 10:16 AM
RV74ME RV74ME is offline
 
Join Date: Dec 2015
Location: Auburn, AL
Posts: 242
Default

Quote:
Originally Posted by Walt View Post
Maybe try turning bluetooth off.
I will try this today on my return trip.
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Steve T.
CFII/MEI/ATP 737,DC-10
RV-7, Lyc IO360
AUO
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  #25  
Old 10-24-2021, 06:37 PM
WiscoAV8tor WiscoAV8tor is offline
 
Join Date: Dec 2017
Location: Burlington, Wisconsin
Posts: 17
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Well, considering that my GTR is the non bluetooth version I doubt the bluetooth from the radio is the cause.
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  #26  
Old 11-14-2021, 06:48 AM
LR60 LR60 is offline
 
Join Date: Jan 2011
Location: Trinity,NC
Posts: 51
Default #Me Too

I just experienced this same issue yesterday for the first time while talking with CLT ATC. I had to turn off squelch to hear them after I realized what was happening and I remembered this thread. I had been in direct communication with ATC when all of a sudden started missing their calls.


I have a single G3, GTR200B, GNX375, GMC507. Radio is 3 months in service, 55 total hours.

Question:
Has anyone found the smoking gun on the squelch/receive issue?

On a different note:
Prior to the receive/squelch problem experience yesterday, I have been having numerous transmit issue regarding ATC asking me to repeat my initial transmission. This has been happening since first flight. I have tied different headsets, a HALO, BOSE X, Lightspeed, and now a CQ. This happens intermittently they seem to not understand my initial transmission and I usually follow up with a how do you hear this transmitter? ATC typically responds with 5x4 or 5x5, so Im confused on whats causing this issue. Recently I dropped the mic gain from default 5 to 4 to see if that will help, bit only have two flights since the adjustment
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RV-14 (flying since 8-11-21)
SN-140458
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  #27  
Old 11-14-2021, 09:03 PM
RV74ME RV74ME is offline
 
Join Date: Dec 2015
Location: Auburn, AL
Posts: 242
Default

Quote:
Originally Posted by LR60 View Post
I just experienced this same issue yesterday for the first time while talking with CLT ATC. I had to turn off squelch to hear them after I realized what was happening and I remembered this thread. I had been in direct communication with ATC when all of a sudden started missing their calls.


I have a single G3, GTR200B, GNX375, GMC507. Radio is 3 months in service, 55 total hours.

Question:
Has anyone found the smoking gun on the squelch/receive issue?

On a different note:
Prior to the receive/squelch problem experience yesterday, I have been having numerous transmit issue regarding ATC asking me to repeat my initial transmission. This has been happening since first flight. I have tied different headsets, a HALO, BOSE X, Lightspeed, and now a CQ. This happens intermittently they seem to not understand my initial transmission and I usually follow up with a how do you hear this transmitter? ATC typically responds with 5x4 or 5x5, so Im confused on whats causing this issue. Recently I dropped the mic gain from default 5 to 4 to see if that will help, bit only have two flights since the adjustment
Hi Mark,

Check your PMs
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CFII/MEI/ATP 737,DC-10
RV-7, Lyc IO360
AUO
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  #28  
Old 11-19-2021, 09:24 AM
WiscoAV8tor WiscoAV8tor is offline
 
Join Date: Dec 2017
Location: Burlington, Wisconsin
Posts: 17
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So that is three of us with the exact same issue. We have compared photos of our configuration and they are exactly the same. One GDU460 with a center stack of a GMC507, a GTR200, and a GNX375 - in that order. I can see 2 being a coincidence and 3? Something is wrong with this Garmin configuration.
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  #29  
Old 11-19-2021, 10:22 AM
Walt's Avatar
Walt Walt is online now
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 6,353
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Maybe try turning off the 375 and see what happens?
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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 2000+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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  #30  
Old 11-19-2021, 10:30 AM
Longez's Avatar
Longez Longez is offline
 
Join Date: May 2009
Location: KS
Posts: 283
Post

Quote:
Originally Posted by WiscoAV8tor View Post
So that is three of us with the exact same issue. We have compared photos of our configuration and they are exactly the same. One GDU460 with a center stack of a GMC507, a GTR200, and a GNX375 - in that order. I can see 2 being a coincidence and 3? Something is wrong with this Garmin configuration.
Since there are likely thousands of people using the very popular GMC 507, GTR 200, and GNX 375 with a G3X Touch system, having a few people with poor reception is probably not evidence of a problem with this combination of equipment.

Just as another point of comparison, I have a G3X Touch system with the GMA 245, GTR 200, GMC 507, and GNX 375 in my stack and don't have this problem. Admittedly, I have the GTR 200 and GNX 375 separated by the GMC 507.

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Steve
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