The PHILCO Phorum

As I told before, I bought an HP sig gen. Before I use it, I decided to make a quick jig to protect it from those charges that sonetimes kill SS output, even when connected through a cap.

This is the generator (the bottom piece)

[attachment=17662]

This is the sch of the jig

The resistor is small, can be from ohms to 20-50 ohm. The Zener is one part, back to back pair. The polarity doesn't matter, could be plusses or minuses out.  I had 5.6V ones.
The voltage is thus clamped at 5.6+0.7V=6.3V. Could be higher or lower. The output signal is 1V RMS or 1.4VPP so anything between 2V and 10V is ok.

[attachment=17666]

This is the jig

[attachment=17663]


The zener and the resistor are small, SC-89-3 and 0603 respectively. But the connectors soldered back to back are so rigid that no effort is transferred to the small components inside.

Very neat Mike!

Just bumping this up since Ron's Signal Generator thread was resurrected.

Thanks Mike!

Yeah...imagine me soldering this with my shaky hands.....

I actually amazed myself this week, I designed a board that has to use very small components, the board itself (have to hold it in hands, no holder) - 0.5x1.8", and the components like SC-70-8, with pins 0.5mm (20 mils) from each other with the pin itself being 12 mils wide, with 8 mils space between them. Compared to that the 0402 resistors (40x20 mils) are gigantic.

Soldered the whole thing.