I bought one on Ebay for under $30 or so - a gun type device with an LED for
aiming. Take a look on eBay for item #110937511368.
Seems to work well (I used it for monitoring temperatures of devices in and
around a 200W, 13VDC power supply). Accuracy? Got no idea. Repeatability -
seemed to be reasonable. Actual measured temperature will, of course, be a
function of the thermal emissivity of the article being measured. I will not, I
understand, measure the temperature of glass tubes very well. Response time is
a
couple of seconds.
Cheapest way I could find to get some idea of what was going on.
73
Bob Groh, WA2CKY
________________________________
From: Gene May <gene-may@hotmail.com>
To: Amplifier Mailing List <amps@contesting.com>
Sent: Mon, August 27, 2012 5:49:46 PM
Subject: [Amps] FW: Transformer power rating guess(timate) and "stand-off" IR
responding thermometers
In a recent exchange between K2VCO and KM1H, they describe what sounds like to
me a good way to test out an unknown transformer's power rating. I have seen
hand-held stand-off, IR responding thermometers for sale at what seem like
reasonable prices. One aims the sensor at the Device Under Test and reads a
temperature, supposedly. These sensors would seem to be excellent to monitor
such tests, and any other test where one is concerned about whether something
is
either being over-driven or under-cooled.
I'm interested in seeing whether the cooling I am building into an amplifier is
sufficient for the tubes and the chokes and transformers in the power supply
circuits. Do any of the readers of this have any experience with any of these?
Accuracy and repeatability? Manufacturer name?
Thanks for your help and advice.
Gene May
WB8WKU
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