[Amps] monitoring tube seal temps

[Radio WC6W]

Hi Alex,
  Those parts won't suffice in this application.

  They work by summing the signal across multiple (2 or more) areas of the chip and don't produce an absolute output; Essentially an AC device.

73 & Good morning,
  Marv WC6W

http://wc6w.50webs.com/


--- On Sun, 7/5/09, Alex Eban <alexeban at gmail.com> wrote:

> From: Alex Eban <alexeban at gmail.com>
> Subject: Re: [Amps] monitoring tube seal temps
> To: dezrat1242 at yahoo.com, Amps at contesting.com
> Date: Sunday, July 5, 2009, 11:15 PM
> You can probably use the pyroelectric
> detector from a junked IR movement
> detector use in burglar alarms. They are quite sensitive
> and you can use
> very simple optics, if needed, to measure temperature at
> choice points. Of
> course you have to calibrate them, but since this is
> entails only setting
> the trip point at a fixed distance, it should be quite easy
> to do. The
> electronics should be simple: a comparator should suffice.
> Alex   4Z5KS
>