"> Though I have some background in Telcom, I'd never heard of the HP 3370(B) > so had to check it out. Here are a couple of take-away quotes from a > thread at: http://www.vintage-radio.net/forum/showthread.php?p=866814
Did you also notice that one of the contributors to that thread goes by the username of 'tonyduell'? That's where mine came from :-)" Not sure how I missed that, Tony, but yes - you're second from the top. On Sun, Aug 7, 2016 at 1:01 AM, dwight <dkel...@hotmail.com> wrote: > It must be a IT-28. It has a 500V leakage check. > > It is not a high precision device but it will be useful. > > I do have a precision LRC bridge made by Marconi > > that I can use for those purposes. It has a quick > > check type large range scales. It is more useful for > > quick checking. > > My main issue right now is to glue a broken > > switch wafer. I tried some super glue but it didn't > > hold. I'm going to try JB weld next. > > Dwight > > > ________________________________ > From: cctalk <cctalk-boun...@classiccmp.org> on behalf of drlegendre . < > drlegen...@gmail.com> > Sent: Friday, August 5, 2016 9:55:27 PM > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: the value of old test and repair equipment > > "I've been restoring a HeathKit capacitor checker." > > Which one, the IT-28? Those are really handy for finding leakage in > high-voltage caps, as they have a crazy-high (like 600V ?) power supply. > Unlike modern SS units, the IT-28 can test at practical working voltages. > > There's data out there on how to finely calibrate those units, but I don't > see much point in it.. It's a lot of fiddly work and for what - to have the > best 40-year-old LCR meter? If you want a better than ballpark measure of L > or C, get one of the cheap uC-based swiss knife testers. A set of 1% metal > film resistors are cheap, though, and will improve stability. > > If you ever feel the need to do semi-precision work with a device like the > IT-28, you're best off running it as a comparator and keeping a set of > precision value caps for reference. In that case, you only need to make > sure you have well matched resistor pairs in the bridge circuit. > > On Fri, Aug 5, 2016 at 10:47 PM, dwight <dkel...@hotmail.com> wrote: > > > I've been restoring a HeathKit capacitor checker. > > > > I also have a couple HP counters with Nixies. > > > > I even have a 10 channel printer ( need to repair the > > > > roller ). I've found that one doesn't need the expensive > > > > ink roller ( though I'd love to have one, used or not ). > > > > I use the two layer impact paper. > > > > Dwight > > > > > > ________________________________ > > From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Ian S. King < > > isk...@uw.edu> > > Sent: Sunday, July 31, 2016 3:46:13 PM > > To: General Discussion: On-Topic and Off-Topic Posts > > Subject: Re: the value of old test and repair equipment > > > > I really like my old test gear and yes, it just seems right to be > restoring > > vintage computers with vintage instruments. HP scopes, logic analyzers, > > DVMs; function generator; Tek scope, frequency counter; as well as just > > 'sundry'. But I did break down and buy a DDS frequency generator to work > > on my VHF/UHF ham gear. > > > > On Sat, Jul 30, 2016 at 6:07 PM, drlegendre . <drlegen...@gmail.com> > > wrote: > > > > > In fact, the value of old test gear varies tremendously.. > > > > > > Vacuum tube testers of certain makes & models are near the top of the > > food > > > chain, with clean, working examples pulling $1500+ (USD) on a very > > regular > > > basis. > > > > > > There's also a strong following for much 'classic' audio analysis gear > > (HD > > > meters, ID meters, spectrum analyzers, etc.) some very fine > multi-meters > > > and anything really hi-end like General Radio, Breull & Kejjr, HP, and > so > > > forth. > > > > > > Some very early examples from the 1910s to 30's also pull good value > > simply > > > for visual appeal. Much of this gear is resplendent with embossed, > > enameled > > > panels, sculpted Bakelite knobs, large meter movements and an overall > Art > > > Deco styling. > > > > > > Seen a nice Supreme Diagnometer recently? Or any of the 40s-70s era > > English > > > made tube testers, like the AVO? Hickok also made a series of bench > VTVMs > > > with massive chromed meters, designed to be large enough that they can > be > > > read from many feet away.. those are beautiful for display, and guess > > what > > > - they work great, too! > > > > > > On Thu, Jul 28, 2016 at 5:24 PM, Dale H. Cook <radiot...@juno.com> > > wrote: > > > > > > > At 03:52 PM 7/28/2016, Electronics Plus wrote: > > > > > > > > >... does as-is old test and repair equip that won't be particularly > > > cheap > > > > have interest to you guys? > > > > > > > > It depends entirely on the make and model of equipment. I always > have a > > > > laundry list of stuff I am looking for - one of the reasons why I > bring > > > my > > > > tablet to meets. > > > > > > > > Dale H. Cook, GR / HP Collector, Roanoke/Lynchburg, VA > > > > http://plymouthcolony.net/starcity/radios/index.html > > > > > > > > > > > > > > > > > > > -- > > Ian S. King, MSIS, MSCS, Ph.D. Candidate > > The Information School <http://ischool.uw.edu> > > Dissertation: "Why the Conversation Mattered: Constructing a > Sociotechnical > > Narrative Through a Design Lens > > > > Archivist, Voices From the Rwanda Tribunal <http://tribunalvoices.org> > > Value Sensitive Design Research Lab <http://vsdesign.org> > > > > University of Washington > > > > There is an old Vulcan saying: "Only Nixon could go to China." > > >
