"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by RDub, October 28, 2016, 04:47:58 PM
Quote from: DoubleTone on October 29, 2016, 07:29:28 PMAnother alternative: a TPM32 Digit Grabber, available on eBay (as in, right now) for about $60+. I bought one several years ago, and for dial calibration, it's excellent.
Quote[...] does this unit tell how fast or slow the rotary dial are, or the make/brake ratio?
Quote from: dsk on October 30, 2016, 01:26:55 AM[ ... ], but does this unit tell how fast or slow the rotary dial are, or the make/brake ratio?
Quote from: TelePlay on October 30, 2016, 08:44:36 AM . . . and other than a digital oscilloscope that can capture and display a trace, does or do these "averaging" analyzers tell a dial's full story like this, first the as found state or condition of a dialand the state or condition of the dial after cleaning and oiling?Yes, it take a lot longer to hook up the dial after the computer is turned on, the capture the audio file, to determine each event point in time (start-stop and each break/make point) and to put that data into an excel template to analyze the dial, then to do a screen capture of the audio file, past it into Photoshop and annotate the dial analysis for personal use or posting. That would be about 30 minutes work once comfortable doing all that (having done it enough in the past to make it easy). Certainly not something a high volume refurb person or shop would want to do but in my opinion, very useful to a hobbyist who not only wants to fix/restore a dial but also understand what is wrong with it and see the effects of their work. There's at least 4 unique issues seen in the first image above. Just saying, a lot of time to get these scans but IMHO, invaluable for the hobbyist trying to understand a dial and fix/restore it by taking a scan after each procedure performed (the difference is the dial between being cleaned and then being oiled and then several days later to see if the oiling has kept the dial the same (I just discovered the oil I used does not hold up over time (months) and as such am in the process of switching to a different, more expensive oil). Just saying, but I do appreciate all of the information I can capture at different points in time and retain it digitally on any dial in my possession.
Quote from: dsk on October 30, 2016, 11:59:53 AMI love this kind of threads, and will like to underline a few of my ideas.Do not try to repair somethings working. Regular cleaning and oiling and service may still be done if you consider it is smart to do it.Audacity and sound files together with a good spreadsheet is good enough for the hobbyist to tune a dial or two from time to time. The make break ratio will usually not change considerably during regular use, and most equipment will read a zero of a dial using approximately the time it takes to say 1001 from release to stop. (Siemens dials slightly longer, they have long way to move between 1 and stop) A rough but good enough for me, spreadsheet is here: https://docs.google.com/spreadsheets/d/1iUKj3jlKp7EoqXAOceQozimP6Pb4OKyP9l5B_KFUztg/edit?usp=sharingdsk