Wanted: LT1088 RMS-to-DC - diyAudio
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Old 6th October 2005, 04:12 AM   #1
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Default Wanted: LT1088 RMS-to-DC

LT1088 - Wideband RMS-DC Converter Building Block

http://www.linear.com/pc/productDeta...Id=H0,C3,P1285

It's been obsolete for many years. However, I'm interested in using it in my circuit.

Anyone happen to have one to sell?
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Old 7th October 2005, 05:07 AM   #2
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To be fair, I'll give preference to the first person desiring to sell one.
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Old 7th October 2005, 11:24 AM   #3
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what frequency band, and what type of signal are you looking at?

the log-rms converters (AD536) work very well, perhaps not quite as well as the LT1088 or the thermopile in an HP3403C, but good enough to be used in the HP3478 6 digit DVM. (btw, HP3403's can be had for less than $10, if it doesn't work, gut it for the chasis)

for noise measurement (100 milliHertz to 10 Hz) you might be well off considering some of the new ADC's made for this purpose -- power measurement has a new lease on life due to the cost of BTU's, and the desire for efficiency.

these folks specialize in "obsolete" electronics:
http://www.harrykrantz.com/index.jsp
they showed 3 pieces in stock.
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Old 7th October 2005, 12:01 PM   #4
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I have a LT1088 and it's for sale. Send me a private message if you are interested.
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Old 7th October 2005, 01:36 PM   #5
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Wow. Two good leads. Thanks. I'm exploring my options. I just "won" a HP3400A on ebay, but the spec isn't so good DC to 5hz.
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