hp 201C

[Rich Klestinez]

The lamp in the oscillator went open and I have tried to google for a
replacement part somewhere. (or a mod to replace it) The manual gives the
HP number as 2140-0007, the manufacturer was GE lamp division with a GE part
number of 8A/S6-12V. I have looked on the lamp for any part number and
there is none.
Any help would be appreciated

thanks
rich in fort worth Texas USA

 

[Bill Janssen]

The lamp in the oscillator went open and I have tried to google for a
replacement part somewhere. (or a mod to replace it) The manual gives the
HP number as 2140-0007, the manufacturer was GE lamp division with a GE part
number of 8A/S6-12V. I have looked on the lamp for any part number and
there is none.
Any help would be appreciated

thanks
rich in fort worth Texas USA

As I remember it is a 4 watt 115 volt lamp.

Bill K7NOM

 

[Rich Klestinez]

As I remember it is a 4 watt 115 volt lamp.

Bill K7NOM

thanks bill
I will see if I can find a 115v 4W lamp with a small screw in base and give
it a try. the base is like one of those small Christmas bulbs that we used
to buy.

 

[Ralph Wade Phillips]

Howdy!

I will see if I can find a 115v 4W lamp with a small screw in base and give
it a try. the base is like one of those small Christmas bulbs that we used
to buy.

THOSE are all over the place. A "standard" night light bulb is 7W,
but almost everyone stocks a 4W replacement for "reduced energy
consumption".

RwP

 

[Rich Klestinez]

To Ralph Wade Phillips

found some at lowes today. bought the 4 watt and the 7 watt bulbs. the 7
watt bulbs were too low in resistance to keep the oscillator stable. it
bounced from a funky looking square wave to a pretty looking sine wave. the
4 watt bulb worked great, the cathode bias was within a few tenths of a
volt in the manual, I could set the feedback to 24 volts and it was very
stable over the last 24 hrs (burn in). just need to re-calibrate and I'm
good to go. your advice is GOLD. Keep up the good work in the group.
sincere thanks

rich
in Texas