Thanks as always Martin. Got 3/5 - came short on the language one and no 5. Should have known better on this one as I have come across it before. Silly idea though, if they have a unique letter, what's the point of putting the number?
I used up my one and only set of questions that were already done. I will tyr to run them one in awhile and perhaps you can help. Please send questions to me at firstname.lastname@example.org. I'll compile them and post.
Got them all- I guess I must be an instrument guy. LOL.
I'm not convinced you can't use type B below 0°C but it has a nasty hook around there where it reverses slope, so a given mV can map to more than one temperature, and nobody that I've seen has bothered to measure the mV below 0°C (the only reason to use such a nasty Pt-Rh thermocouple is if you have to go up to very high temperatures (>1500°C)).
I am not sure if we are talking about the same (or my bad English is tricking me), but... let it go:
If the matter is DB x DE connector designations, the first letter (D) is for 'D' type (or trapezoidal), second - A,B...E is for shell size and the number, for the number of pins, of course. For example, we can have DB25 and DB31 - same shell size but different number of pins. The same for the - once ubiquitous - DE9 (PC serial port) and DE15 (aka VGA) .
@Andrewier....Thanks for that, very well put, I'd forgotten about VGAs. I guess there is some sense to it. Are you sure about DB-31 - I remember seeing a high denisty plug the sdame size as a DB-25 but (like a VGA) with 3 rows of pins, but there would have been a lot more than 31 there....
@David Ashton... I am glad to be of help, despite my limited English abilities. From what I remember ITT Cannon and Amphenol used to have all sorts of D-Subs, 2 and 3 rows kinds with odd countings like 25, 31, 36, 37, 51 and so on. Also interesting to note that shell size grows in order A, B, C, D and suddenly shrinks to E, the smaller of all shells. I remember that was a heavy nightmare to understand the Cannon catalog in order to build a proper P/N for ordering. I used to buy it for geomagnetic sensors, requiring shells and everything else to be made of non magnetic alloys, as brass or aluminum. It was a real challenge requiring double checking (usually more than one person) to make shure we wouldn't buy very expensive wrong parts!
@Andrewier...."despite my limited English abilities." Please don't apologise, if my command of other languages (French and Afrikaans in my case) was as good as your English, I would be a happy man!
I've also seen D-subs with coax connectors in them as well as pins. Pretty rare though. And they are also confusing in what is male and what is female the shells have a different sense to the pins. I stick with Pins = male which seems right most of the time. Don't you hate it when you misinterpret the catalog and you end up with wrong parts????