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Re: 21A and 22A for 555


Stan or Patricia Griffiths
 

Mixing 21,22,21A, 22A. Let me say I don't know of any reason why you
couldn't do it but I have never tried it . . .

I will keep my eyes open for some plugins for you. I just enlarged my
collection by an addtional 350 instruments (to a total of about 1100) so I
might just have some by the time I get all that stuff transported to my shop
. . .

Stan
w7ni@...

morriso2002@... wrote:

--- In TekScopes@y..., Stan or Patricia Griffiths <w7ni@e...> wrote:
morriso2002@y... wrote:
There was an extensive modification to the 21A and 22A tunnel diode
triggers

<snip>

I would stay away from
those
unless they have had Mod Kit 040-0417-00 installed.
Hi Stan,

Thanks for the advice. The only 21A/22A I have ever seen, which
belongs to a friend, has the later version triggers. These timebase
plugins are not easy to find and I suspect "beggars will have to be
choosers" if a pair ever turns up. Mind you, the 21/22 works very
nicely indeed.

Incidentally do you know if it is possible to mix a 21 and 22A or 21A
and 22 in the one mainframe?

Morris

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