You probably have a lot more room to play with, given the larger housing on your OCXO. The ULN series is rather densely packaged, and that was one reason why I wasn't crazy about going after it with a propane torch. In your case I'd be tempted to try the torch method before actually damaging the housing with a Dremel tool.
While fixing a couple of Ovenaire OCXOs that use a similar form factor, I've noticed that their PC board edges don't come anywhere near the endcap. The Ovenaire parts were sealed with epoxy, so a heat gun was all that was needed to open them, but I'm sure I could've opened them with a torch without hurting anything, if they'd been soldered shut. -- john, KE5FX > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on > Behalf Of Ed Palmer > Sent: Tuesday, January 20, 2009 5:59 AM > To: time-nuts@febo.com > Subject: Re: [time-nuts] Wenzel Oscillator Repair > > > Now I understand! I was planning to reuse the case. It didn't occur to > me to sacrifice the case and put the oscillator in another box. > > Thanks for the idea, John. > > Ed > > > Message: 3 > > Date: Mon, 19 Jan 2009 21:20:54 -0800 > > From: "John Miles" <jmi...@pop.net> > > Subject: Re: [time-nuts] Wenzel Oscillator Repair > > To: "Discussion of precise time and frequency measurement" > > <time-nuts@febo.com> > > Message-ID: <pkegjhphllbaceoiccbjmeccbcac.jmi...@pop.net> > > Content-Type: text/plain; charset="us-ascii" > > > > I used a fiberglass-reinforced cutoff wheel. This can open practically > > anything, but it puts a lot of vibration and dust into the innards of > > whatever you're taking apart. My guess was that this was safer > than using a > > torch. > > > > Since I wasn't going to be able to maintain the original hermeticity, I > > remounted the oscillator in a Hammond box, like so: > > > > http://www.thegleam.com/ke5fx/w1.jpg > > > > I brought the trimmer (which was also damaged in this > particular oscillator) > > and oven-status LED out to the box lid, along with the four original > > terminals. Makes a nice package that can be easily opened for > maintenance: > > > > http://www.thegleam.com/ke5fx/w2.jpg > > > > The repackaged OCXO seems to work fine. I haven't made any hardcore > > measurements with it but I can tell just by watching the > counter that its > > short-term stability is similar to my other unmolested 5 MHz ULN. > > > > -- john, KE5FX > > > >> -----Original Message----- > >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on > >> Behalf Of Ed Palmer > >> Sent: Monday, January 19, 2009 4:07 PM > >> To: time-nuts@febo.com > >> Subject: Re: [time-nuts] Wenzel Oscillator Repair > >> > >> > >> I hadn't thought of using a Dremel. Did you use an abrasive wheel or a > >> steel cutter? The case on mine looks to be about 20 ga. tin-plated > >> steel (~0.04" thick). The gap is so small it might have been > a friction > >> fit to start with. > >> > >> Ed > >> > >>> From: "John Miles" <jmi...@pop.net> > >>> Subject: Re: [time-nuts] Wenzel Oscillator Repair > >>> To: "Discussion of precise time and frequency measurement" > >>> <time-nuts@febo.com> > >>> Message-ID: <pkegjhphllbaceoiccbjmepmbbac.jmi...@pop.net> > >>> Content-Type: text/plain; charset="us-ascii" > >>> > >>> I had a similar problem with a 5 MHz OCXO from their ULN > >>> > >> series. There was > >> > >>> a bad solder joint on the output connection, easy enough to fix > >>> > >> once I got > >> > >>> the unit open. > >>> > >>> In my case I used a Dremel tool to cut the seam. Suggest > wearing a dust > >>> mask, obviously, and keep your cuts close to the perimeter of > >>> > >> the can, in > >> > >>> case the PC board comes right up to the edge like mine did. > >>> > >>> -- john, KE5FX > >>> > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@febo.com > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.