On 18 Dec 2005 19:38:19 -0800, Winfield Hill
wrote:

Rolf_B wrote...

Very interesting. The 1N4007 seem to be very versatile devices.
They are available with a SOD-57 glass envelope, too (1N4007G?).
These are fairly well photoconductive. When illuminated ...

While many companies* are making 1n4007G glass-passivated diodes,
it appears they all cover the glass with plastic. I wonder...
where one can get a 1n4007 with an all-glass package these days?

* Including unusual semiconductor manufacturers, like: Won-Top,
Bytesonic, Leshan Radio, Formosa Microsemi, Gulf Semiconductor,
Dachang Electronic, Goodwork Semiconductor, etc.

Or use a differnt diode in a glass case. The PN junction makes a
decent small area photovoltaic cell (transistors too).

FYI: if your using 1n4007 for a varactor, light impinging on glass
versions will drive you nuts ( Florescents will give AC hum
modulation) and lower the Q.

Allison