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02-14-2019, 07:27 AM
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Join Date: Jan 2007
Location: Kalispell, MT
Posts: 40
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Walt... what's the price tag on that panel you showed above?
__________________
Geek out... 
RV-8: Empennage underway
N406RR reserved
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02-14-2019, 07:52 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Quote:
Originally Posted by ops_geek
Walt... what's the price tag on that panel you showed above?
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If you have to ask you can't afford it
(figure about 30K for equip give or take)
__________________
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, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
Last edited by Walt : 02-14-2019 at 01:06 PM.
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02-14-2019, 08:30 AM
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Join Date: Jan 2016
Location: Portland Oregon Area
Posts: 81
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Second comm?
Doesn't the GTN 650 or 750 give you that additional comm? Confused.
__________________
_________________
Jim
Rans S20 Raven Sold Built in 2016
ATP, CFI/II/MEI
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02-14-2019, 12:40 PM
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Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,573
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Quote:
Originally Posted by romaja
Doesn't the GTN 650 or 750 give you that additional comm? Confused.
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I was considering the GTN 650 as the only radio. Do I really need another?
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!! 
VAF donation Jan 2020
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02-14-2019, 01:06 PM
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Join Date: Jan 2016
Location: Portland Oregon Area
Posts: 81
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Quote:
Originally Posted by scsmith
I was considering the GTN 650 as the only radio. Do I really need another?
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Steve,
Not sure if your bird will be IFR or not. The GTN 650 has a capable radio inside. I am confused as people are talking about installing a GTN 650 or 750 in addition to dual Garmin radios. That sounds like 3 radios to me? I would think a GTN 650 plus an additional Garmin radio would suffice for IFR.
FWIW, I own a Rans S-20 Raven and have it set up for VFR only. I have a Dynon Skyview and one radio. Works well. Sometimes it would be nice to have another radio but seems to work well for me. It has dual watch which enables you to listen to 2 different frequencies at once. If I am talking to ATC on the primary, I can listen to the ATIS on secondary. It biases the primary frequency if their are transmissions on both frequencies simultaneously.
I have been toying with the idea of building an RV set up for IFR and I think A GTN 650 and one additional radio would be adequate. IMO
Best,
Jim
__________________
_________________
Jim
Rans S20 Raven Sold Built in 2016
ATP, CFI/II/MEI
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02-14-2019, 01:12 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Quote:
Originally Posted by romaja
Doesn't the GTN 650 or 750 give you that additional comm? Confused.
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Yes the 650/750 has full com, if you want dual com you need another radio like the remote mounted GTR20 or panel mount GTR200.
Quote:
Originally Posted by scsmith
I was considering the GTN 650 as the only radio. Do I really need another?
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Nope dont really "need" it, but for a little extra (about 1k) you can have the remote mounted com 2 which comes in handy and makes a great back-up.
__________________
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, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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02-14-2019, 01:33 PM
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Join Date: Jan 2007
Location: Kalispell, MT
Posts: 40
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Quote:
Originally Posted by Walt
(figure about 30K for equip give or take)
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Dear lord...VOR/ILS is sounding better and better.
__________________
Geek out... 
RV-8: Empennage underway
N406RR reserved
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02-14-2019, 04:32 PM
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Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,573
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Quote:
Originally Posted by Walt
Yes the 650/750 has full com, if you want dual com you need another radio like the remote mounted GTR20 or panel mount GTR200.
Nope dont really "need" it, but for a little extra (about 1k) you can have the remote mounted com 2 which comes in handy and makes a great back-up.
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Well, about $1K for the second radio, but then you also need an audio panel, and it all starts to take up a lot of space on an RV-8 panel. The remote helps that some, although the instrument bay gets pretty full of boxes too.
But my real point was that radios have gotten to be so reliable that I'm not convinced I really need a backup. I lost coms once in a rented 172 because of a dead battery and bad alternator. I have lost coms a few times in my glider because of a dead battery.
I've never had a radio fail in a way that a second one would work.
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!! 
VAF donation Jan 2020
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02-14-2019, 05:24 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Quote:
Originally Posted by scsmith
Well, about $1K for the second radio, but then you also need an audio panel, and it all starts to take up a lot of space on an RV-8 panel. The remote helps that some, although the instrument bay gets pretty full of boxes too.
But my real point was that radios have gotten to be so reliable that I'm not convinced I really need a backup. I lost coms once in a rented 172 because of a dead battery and bad alternator. I have lost coms a few times in my glider because of a dead battery.
I've never had a radio fail in a way that a second one would work.
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If you don't want an audio panel and just want to use the 650 com, then you need a intercom of some sort which is half the cost of a modern audio panel which has many more features.
__________________
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, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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02-14-2019, 05:28 PM
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Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
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Quote:
Originally Posted by scsmith
Well, about $1K for the second radio, but then you also need an audio panel, and it all starts to take up a lot of space on an RV-8 panel. The remote helps that some, although the instrument bay gets pretty full of boxes too.
But my real point was that radios have gotten to be so reliable that I'm not convinced I really need a backup. I lost coms once in a rented 172 because of a dead battery and bad alternator. I have lost coms a few times in my glider because of a dead battery.
I've never had a radio fail in a way that a second one would work.
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You don't need an audio panel just for a second com. A switch (for mic/PTT) and an audio mixer (maybe in an intercom) is all you need, especially if the second com's use is mostly for back-up/listen to ATIS.
I honestly don't quite understand the fear of losing com, as a safety issue (dispatch reliability/convenience is another story). After all, ATC won't fly the plane for you. What looks very iffy to me is the loss of nav, in an airplane with only one nav source, in IMC. Then you're hoping ATC can offer you a vector to VMC, or an ASR approach, and hope that it gets you into visual conditions.
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