I suppose there are two reasons why so many pins are present. One is
locating the right position of the tube - if you skip most of the pins,
then orientation can be located only by judging where the front of the tube
is. If there is only one way to put something in something, then the risk
of
FYI, crystals in glass cases are still being manufactured.
Total Frequency Control in the UK list some in the H/C-26U type case.
See: http://www.tfc.co.uk/pdfs/HC-26-U_TFC.pdf
( I have no connection to this company.)
Mark
On Friday, May 18, 2018 at 4:37:17 PM UTC-5, Terry Kennedy wrote:
>
> On
Great value in that reminder Gaston; well done.
Another regulator arrangement that needs great care is this.
I have seen instances where the shunt regulator is designed to deal with the
expected change in current in the load.
For instance the load might always draw at least 70mA and never more
Actually, in most if not all of the voltage regulator/voltage reference
tubes, at least a pair of the pins are used as security feature. This is
just a short circuit between two pins that are used to disconnect the
output of the power supply when the regulator is not in the socket to avoid
> At the glass company I worked at, most production was for relatively
> high-cost / low-volume products. One big exception was a part (something like
> BC1237 - I forget the exact number) which was the base + lead assembly we
> made for Motorola, used for a 3.58MHz crystal in TV sets.
That's
On Friday, May 18, 2018 at 2:02:32 AM UTC-4, Tomasz Kowalczyk wrote:
>
> I suppose there are two reasons why so many pins are present. One is
> locating the right position of the tube - if you skip most of the pins,
> then orientation can be located only by judging where the front of the tube
>
