I acquired an Infrared Detector in a lot but cannot locate any info on it. It was made by Infrared Asscociates of New Brunswick, NJ, and the label says Model Number HCT-NB-A.
Does anyone have any info on this ? I hate to trash it if it can be used by someone.
Thanks, Dick, W1KSZ
What he means is **if I can make a buck off it by SPAMMING Usenet with yet another advertisement**.
Awfully decent of you to make mention of my previous posts. I still have some of it available.
Now my question is, who died and left you in charge ??
73, Dick, W1KSZ
JeffM wrote:
Richard W. Solom>who died and left you in charge ??
If you pulled the same kind of crap in meatspace that you pull on Usenet (e.g. walk into a conference room and launch into an Amway spiel) at best, I would expect you to be escorted out of the room roughly. If you pulled this crap in some places I know of, you would come out of the experience beaten and bloody.
Groups that welcome advertisements ARE NOT HARD TO SPOT. In their names they have words like ads biz forsale marketplace
**How NOT to Advertise on Usenet** by Joel K. Furr http://66.102.9.104/search?q=cache:CMU1z-5ywJ4J:shopsite.com/help/4.1/sc/lte/usenet.html+rude.to.advertise.*.*+*-*-*-*-*-*-the-word-forsale-or-marketplace-in-their-names+preserve.*.culture.of.open.discussion+reads.*.advertisement+detailed+*.most.pervasive.form.*.*.*.*-*+How-*-to-Advertise-on-Usenet+biz+hated+rude+lose-*-account
I don't recognize the model number, but my experience with them had been that they are photoresistors.. With a constant bias of a few volts, mre trickle current flows when there is light ot IR falling on them. The sesitive spot was located at the focal point of a refracting lens (that transmits in the infrared) or a small parabolic mirror. They often had to be cooled. If it is of a cooler type, the senstitive spot was under the bottom of a contaner.. looks like a small inkwell.
drmant resistance was a few hunderd k at room temperature; few megs when cooled.
Mu last crack at them was inthe 1950's.
Angelo Campanella
Have something to add? Share your thoughts — no account required.
Ask the community — no account required