GMC 307 vs. GMC 507

[g3xpert]

Originally Posted by Dugaru

Any upgrade path available for us early adopters?

A GMC 307 can be updated to a GMC 507 with a little bit of installation work. The CAN bus would need to be brought over to the GMC and the connector would need to be repinned. You would also want to add the audio wiring from the GMC to your intercom since that is your primary desire for the upgrade to the GMC 507.

Thanks,
Levi Self

[jeffw@sc47]

I initially purchased the 307 for my build about 10 months ago. The day I received it from the dealer I learned that the 507 had been available for a few months. I asked the dealer if I could exchange the just received 307 for a 507.

Yes I could, but I had to pay a Garmin Co impossed restocking fee of 10% (around $100) for the exchange. I did that. What is so difficult about accepting a return for exchange, it was not a return for reimbursement of the payment?

[Turbo69bird]

Originally Posted by jeffw@sc47

I initially purchased the 307 for my build about 10 months ago. The day I received it from the dealer I learned that the 507 had been available for a few months. I asked the dealer if I could exchange the just received 307 for a 507.

Yes I could, but I had to pay a Garmin Co impossed restocking fee of 10% (around $100) for the exchange. I did that. What is so difficult about accepting a return for exchange, it was not a return for reimbursement of the payment?

Certainly a valid question especially if the 507 was available and no one told you aboiyt it .

G3expert has been an amazing resource of info for me trying to learn what?s available and what it?ll do. If I end up buying garmin it will be 100% due to his help and support.

[Dugaru]

I was thinking more along the lines of a trade-in deal. The GMC 307 was superseded pretty quickly, and since the 507 is significantly better and costs the same, I'm feeling some pain as a result of being an early adopter of the GMC307/G5 autopilot combo. Any chance for an upgrade deal, or is it the classic case of a "pioneer" catching an arrow in the back?

BTW, I can't be sure, but it looks like the GMC 307 is still being sold. For example:

https://buy.garmin.com/en-US/US/p/531504
https://www.gulfcoastavionics.com/pr...ontroller.aspx

Are you guys still selling the remaining 307s? I confess I'd feel especially frosted if I bought a 307 currently, only to learn that the 507 is available for the same price.

Originally Posted by g3xpert

A GMC 307 can be updated to a GMC 507 with a little bit of installation work. The CAN bus would need to be brought over to the GMC and the connector would need to be repinned. You would also want to add the audio wiring from the GMC to your intercom since that is your primary desire for the upgrade to the GMC 507.

Thanks,
Levi Self

[g3xpert]

Originally Posted by Dugaru

I was thinking more along the lines of a trade-in deal. The GMC 307 was superseded pretty quickly, and since the 507 is significantly better and costs the same, I'm feeling some pain as a result of being an early adopter of the GMC307/G5 autopilot combo. Any chance for an upgrade deal, or is it the classic case of a "pioneer" catching an arrow in the back?

BTW, I can't be sure, but it looks like the GMC 307 is still being sold. For example:

https://buy.garmin.com/en-US/US/p/531504
https://www.gulfcoastavionics.com/pr...ontroller.aspx

Are you guys still selling the remaining 307s? I confess I'd feel especially frosted if I bought a 307 currently, only to learn that the 507 is available for the same price.

Dugaru,

The GMC 307 is being produced for the time being as there are some customers who want/require this unit for certification or installation reasons, but it is not in the current Garmin produced marketing materials. If you talk to any dealer about which products to buy, they should point you to a 507 for a new installation.

The GMC 307 is still fully supported and provides all of the features that were available when you purchased the product. If you feel that the additional features in the 507 are worth upgrading for, you have that option as well.

Garmin does not have a trade in program for the GMC, but you are certainly welcome to talk to your Garmin dealer about the best way to upgrade.

Please don't think that you aren't a valued customer because we continue to make newer, better products and work hard to keep costs down so that we don't have to increase the price of our newer products.

Thanks,
Levi

[snoop9erdog]

G3x Expert,

I noticed that on the GMC 507 to G5 Interconnect Dwg 190-02072-01 it calls for on pin 5 a Sonalert Active Low. I will not have a audio Panel GMA 245...only a GTR200B.

What is the sonalert function? Do I need it in conjunction with a G5?

[g3xpert]

Originally Posted by snoop9erdog

G3x Expert,

I noticed that on the GMC 507 to G5 Interconnect Dwg 190-02072-01 it calls for on pin 5 a Sonalert Active Low. I will not have a audio Panel GMA 245...only a GTR200B.

What is the sonalert function? Do I need it in conjunction with a G5?

Hello Ed,

The ability to drive a sonalert "beeper" is only provided for aircraft with no means to receive the tone and voice alerts from the GMC 507.

Fortunately, your GTR 200B has 2 aux audio inputs, either of which may be used to receive this aural autopilot alerting output from pins 13,14 on the GMC 507.

Thanks,
Steve

[lr172]

Originally Posted by g3xpert

A GMC 307 can be updated to a GMC 507 with a little bit of installation work. The CAN bus would need to be brought over to the GMC and the connector would need to be repinned. You would also want to add the audio wiring from the GMC to your intercom since that is your primary desire for the upgrade to the GMC 507.

Thanks,
Levi Self

I notice the reference to audio alerts being new with the 507. I have a 307 that I am not yet flying. Will I get basic tones or messages from the 370 (connected to audio panel) when engaging or disengaging the AP?

Larry

[snoop9erdog]

Originally Posted by g3xpert

Hello Ed,

The ability to drive a sonalert "beeper" is only provided for aircraft with no means to receive the tone and voice alerts from the GMC 507.

Fortunately, your GTR 200B has 2 aux audio inputs, either of which may be used to receive this aural autopilot alerting output from pins 13,14 on the GMC 507.

Thanks,
Steve

Steve,

The GTR200B has 2 aux audio inputs........1 will go to the GDU 460 and the other to the 507. But what about if I have a second scree GDU 460 MFD? So in other words I won't need to use that second Audio in for the MFD?

[g3xpert]

Originally Posted by snoop9erdog

Steve,

The GTR200B has 2 aux audio inputs........1 will go to the GDU 460 and the other to the 507. But what about if I have a second scree GDU 460 MFD? So in other words I won't need to use that second Audio in for the MFD?

Hello Ed,

Sorry, I didn't realize you had a G3X Touch system. The GMC 507 alert audio output is really just for aircraft that only have a G5 autopilot system.

There is no reason to use the alert audio or sonalert interfaces on the GMC 507 since your GDU 460 PFD provides all of the alerting audio, including autopilot, traffic, terrain, etc with a single audio connection to the GTR 200B.

There is no reason to connect the audio output from the MFD to the GTR 200B.

Thanks,
Steve