Join Date: Apr 2006
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Dunno, SD, and I'm sure there's an exceptipon that proves the rules and vice versa.
I'm only saying that over the past 5-10 years I've heard this question a number of times in a number of forums, and heard answers that pretty much all say "if it is the same frequency, the rest is close enough so it will work". Followed up by comments that it has worked, or no comments at all.
Which could mean the ones that didn't work simply blew up and never got online again.[vbg]
But from what I gather, the transducers are all very similar, essentially piezo units that will "ring" when excited by a specific signal, and the main difference is whether they are made to ring "high" or "low" at the two main frequencies, each requiring some differences in how they are made.
So personally, I'd be willing to take a shot trying it. Might blow out the head end, might just work fine. Each has to roll those dice for themselves.
Calling Garmin [g] can be an interesting experience. Sometimes they are not only proprietary and scared of lawsuits (like most companies today, they will not recommend ANYTHING "custom" because they're afraid someone will boow something up and then sue them) but they are sometimes outright paranoid. I had called them years ago to ask which type of algorithm they used to calculate position, which had some relevance to a discussion about GPS and position in another forum at that time, and their rebuff was "Our algorithms are proprietary information, we can't tell you any of that! Who are you! What are you trying to steal!" When really, the question was just asking which of two systems they were using--without asking ANY of the specifics beyond that. You know, "Gas or diesel?" and nothing more.
And if you think that's scared, I even met a USCG Station where they refused to tell me when the next slack in an inlet was going to be. Because someone apparently had asked them that, and then sued them over the result! Kinda like being sued because someone asked you "Is today Monday?" but there ya go.