I am disappointed that you have been withholding this information all this time, especially after graboy created a topic specifically to discuss these switches.
With that said, I have catalogues for 73, 74 and 82. 73 and 74 are both M6 and are both | mount. 82 is M7 and is | and T mount. I do not see how this contradicts what I said: M6 and M7 appear to be identical. The fact that an additional mount was introduced does not make it a new switch. The fact that I have found two different sets of internals means nothing, as it turns out that Cherry changed the internals of the MX switch too, and both versions are different again from the patent.
In the 1974 catalogue, the DPST NO version is given as M52-0104 (0°) / M62-0110 (10°) which I took to be a typesetting mistake, as M5 does not appear anywhere else.
I have already said enough times that we won't fully understand these early switches without more catalogues, as there is a huge gap between 1974 and 1982. I never claimed to be an expert on old Cherry switches; no-one is, thanks to a combination of relative scarcity and limited documentation. Many of the catalogue products are never seen at all, while there are also switches seen but not found in catalogues (old and new style + mount M6/7, and M11, in particular).
7bit wrote:
While we are at it:
M9 article:
"The stem has a dual design for both linear and tactile depending on the position it is inserted against the leaf. "
Well, indeed the stem goes in 2 ways, but thre is no difference in tactile feel (I've tested this), but there is room for a 2nd contect mechanism to do what an MX can't do: close contact in 2 different circuits!!!
:o
Now, who is the number one keyboard expert on planet earth?
:evilgeek:
I never wrote that comment; you are mistaking me for IvanIvanovich. If I had written it, it would be referenced back to another source, explained in far more detail, or illustrated directly within the page. This might help illustrate why I stress the need for decent inline illustration and references.
I have very little data on M9, but the slider and contact design is very similar to M8, which we know had tactile versions from later M8 brochures. Again, I don't know that such a switch has ever been seen, so we don't know what's inside them.
If you want to be a switch expert, though, then keeping things secret won't help your cause. There's a wiki there waiting for you — start writing up all this information and illustrating it. You've got a good camera and you know how to use it!
but I know nothing about...
nice find!
