Hi It's a solder seal can and if you have the right gear it comes open easy. If you happen to have a 1KW RF induction heater they are very easy to open. If by the odd chance you don't have one of those, a nice big soldering iron (or two) can come in handy. Solder wick and working your way around the seal twice seems to be the most direct approach. Vacuum desoldering also works, but I find the wick does a quicker job.
Don't go to crazy, it does take time to heat the can (either way) and the can will get hot. A vice with non-melting plastic jaws is handy for holding it while you work. A piece of leather on the jaws can be a substitute. Don't clamp it directly in metal jaws or you will have a tough time getting the seal hot enough. All of that assumes you want to put it back together. If you don't then cutting it open is *much* faster :)…. Bob On Feb 9, 2012, at 6:04 AM, Azelio Boriani wrote: > Don't be afraid and open up your MV89. I have done this with many MV201 > without problems. > > On Thu, Feb 9, 2012 at 8:25 AM, Sam <[email protected]> wrote: > >> I just powered up one of my MV89A's and measured ~7 dBm into my HP 8920B, >> but as Tom has mentioned some MV89A's develop >> a dry joint around the output bypass capacitor >> http://www.hellocq.net/forum/showthread.php?t=283551 >> >> What is the date and revision number on yours? I have 2 here 07/34 and >> 07/31 both Rev 3 bought from fluke.l >> >> >> Sam >> >> >>> Got my replacement FE-5680 and a MV89 in from Nichegeek. I figured >>> I'd better power up and check the MV89 before I let 'em know >>> everything was ok. The MV89 is warming up nicely, the current is >>> down to 290 mA (and still dropping), but the output seems low; about >>> 40 mV RMS as measured on a scope with a 10Meg 10x probe. (Datasheet >>> spec is +7 +/- 2 dBm.) The output is too weak to reliably trigger my >>> 5345A counter. >>> >>> The reference voltage measures 4.90 VDC. >>> >>> If anyone can make a quick measurement on their MV89, I'd appreciate it. >>> >>> >>> thanks! >>> newell N5TNL >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
