Slide in – sounds perfect but please remember that this 8.33 radios are much more sensitive on interferences and in pair with vintage aircraft wiring effect can be that after few months you will do normal upgrade anyway….
I make plenty of radio or com/nav replacements including exchange of all radio/audio wiring + antena wires. Effect is good – evertyhing is working and it’s quiet…
Slide in its lottery – depends how much bad thinks you have already in aircraft.
Peter wrote:
Does the G5 really accept NAV signals via ARINC429, and not via CAN which is the usual Garmin way?
Yes and no… The ARINC signals go from the navigator to a GAD29B box, which passes them on to the G5 on the CAN bus.
The DB30 comes from the apollo line, like the GNS480!
I used it in order to interface a KN64 with the DME input of a Dynon HS34
I don’t see anything obviously analog there. It would be either the + and – deviation, and discrete wires for Valid flag(s), or a composite signal, as the input.
The DB30 does almost everything 
Shadin has a line of analog to ARINC429 converters.
Also, the Garmin DB30 is an interesting piece of equipment when you want to play with a DME.
There must be a market for analog to ARINC429 converters 
What labels are being used?
Nickmatic wrote:
It’s just driving a Bendix King KI 203 or 208, nothing fancy.
According to the installation manual, the G5 can only work with a NAV receiver that has a digital ARINC output. There are no analogue connections.
Ultranomad wrote:
makes it compatible with modern indicators like the G5
It’s just driving a Bendix King KI 203 or 208, nothing fancy.
Nickmatic wrote:
I’m looking at the GNC255 since it was mentioned in this thread or another but I’m open to whatever is easiest/least expensive.
GNC255, though not cheap, currently seems to be the only unit on the market that supports 8.33 kHz on COM and RS-232 output on NAV (which makes it compatible with modern indicators like the G5).
