encoding altimeter or blind?

[A64Pilot]

I have an 81 J model that has an aero mechanical encoding altimeter, logbook says it was replaced with an overhauled one in 06. My encoder CB is popping making me think the encoder in the altimeter is bad.

Should I just buy another altimeter with an 8130 and change it out (I’m am A&P) or bail on the altimeter and take it to an avionics shop and have a blind encoder installed?

Price is about the same, except for the install of the blind encoder which I’d guess is about $300? So altimeter about $300, or encoder is double about $600.

‘I guess what I’m asking is, is an overhauled altimeter going to last or will it break again soon, what’s the reliability of one? I know blind encoders seem to last along time

Last question, it appears at first glance that the instrument panel face is removable, is it? Sure would make life easier if it is.

Edited March 8, 2021 by A64Pilot

[N201MKTurbo]

What transponder do you have? Will it take a serial input? Do you have any other avionics with an ADC? Like a G5. If so, you may already have what you need. A serial encoder is easier to install than a grey code encoder. You may luck out and the connector on your encoding altimeter may match a blind encoder. You also need to plumb a static source and get it recertified. This could exceed the cost of the encoder. 

[A64Pilot]

I have a old 76a, so grey code only, nothing more modern than a 430W, I like my old HSI much better than a G5 personally. I flew a neighbor’s V35 and it had G 5’s and to me the display was just too busy, but they are a lot of bang for the buck only a fraction of what an HSI costs

‘I may go with a Garmin 327 as I have one in my other airplane and it’s serial of course, but more money.

‘Money is an issue, I just bought the airplane and I’m retired

Edited March 8, 2021 by A64Pilot

[smwash02]

Getting your altimeter encoder fixed will be the simplest and most cost effective path.

A blind encoder will require the encoder, static system change, possible harness change, leak down test, and certification. If you have a KAS297B (altitude pre-select) it will require barro adjustments from somewhere as well.

A Garmin 327 will still need an altitude source from somewhere, so you're back to square one.

[carusoam]

See what @Alan Fox has on the shelf...

-a-