I'm wondering how long those LCDs will be "dead-on"....if they've never been ran, they haven't gone thru any burn-in. All the manufacturers give different deviations for first year...anywhere from +/- 3 ppm to 15 ppm(someone else can do the math...I'm tired from X-mas shopping, but I did pull out my electronics cataloge.) And then there is the frequency tolerence: anywhere from +/- 20 ppm to +/- 100 ppm! And some have a very narrow operating range(some cheaper ones have a bottom range of 0 degrees c. , others go as low as -40 c. Many of the newer modules don't have a trimmer, so there is no way to compensate for the aging of the crystals. For replacements about the best you can do is purchase crystals with lowaging, low frequency tolerence and a wide operating range.
The inaccurate modern ones - I'm thinking cheap crystals and no trimmer.
don't store watches you don't plan on wearing with batteries in them - why age them more than necessary? Unless you plan on adjusting the trimmer(if they have one).
http://www.retroleds.com -
Sales of vintage LED, LCD, analog watches,
parts and gadgets -
repair tutorials & tips
Nov. 2022 - back in business!! BItter divorce is in home stretch, come grabs some great deals, I had to open the safe . . . damn attorneys. piss.