[time-nuts] Normal operating specs of a Morion MV89?

Bryan _ bpl521 at outlook.com
Tue Sep 20 15:56:25 EDT 2016

May also want to check the output amplitude. If memory serves me correct it is very common for a capacitor inside this model number to fail. It can be fixed but requires a torch or a pretty heavy duty soldering iron to get the can open. 

> From: listertim at gmail.com
> Date: Mon, 19 Sep 2016 14:31:06 -0700
> To: time-nuts at febo.com
> Subject: [time-nuts] Normal operating specs of a Morion MV89?
> I recently ordered and received what claims to be a 2007 vintage
> Morion MV89 from ebay (I say claimed as that what the auction item
> said, but my unit is missing the identifying label on the top and just
> has '2007 MV89A' written on the side in marker). I've powered it up
> with a bench power supply at 12V and it's drawing 390mA at steady
> state. I measured the case temperature with a ThermaPen Mk4 (not often
> I get to combine the hobbies of bbq and timenuts...) which is
> calibrated to +/-0.7F to be about 111F, varying somewhat with
> position.
> This seems pretty hot - Is this normal ? The datasheet says it should
> draw <350mA when at steady state but doesn't say what temp it should
> be at. Does anyone else have info on their version to see whether this
> is normal ?
> Cheers,
> Tim
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