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Old 20th May 2009, 12:14 AM   #1
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Question JLH Distortion Meter in ETI

Here's one for old hands in the UK! Back in the day, I built the Linsley Hood Distortion Meter from ETI (Jan-Mar 1985) using the ETI PCBs. I want to rebuild it a bit more tidily, but my copy of the articles has gone walkabout.

Does anybody have a copy at least the circuit diagrams that I could scrounge?

Thanks,
Colin
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Old 20th May 2009, 03:28 PM   #2
Spirtos is offline Spirtos  Greece
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Im not sure but I think I have copy of this article,

I ll check it when I ll be back in home
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Old 20th May 2009, 06:05 PM   #3
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Quote:
Originally posted by Spirtos
Im not sure but I think I have copy of this article,

I ll check it when I ll be back in home


Thanks, that would be great!

Colin
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Old 20th May 2009, 09:27 PM   #4
Spirtos is offline Spirtos  Greece
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Sorry for the delay, check your mail
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Old 21st May 2009, 05:36 AM   #5
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I don't recall this

Could I please have a copy
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Old 21st May 2009, 01:02 PM   #6
Spirtos is offline Spirtos  Greece
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Of course you can
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Old 21st May 2009, 01:11 PM   #7
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Thanks Spirtos
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Old 21st May 2009, 01:14 PM   #8
forr is offline forr  France
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Linsley-Hood published four distometers at least.
According to his claims, his best performers were :
"Spot-frequency distorsion meter", Wireless World, July 1979.
"Distorsion meter" ETI, January, Frebruary and March 1985.
"Measure THD to 0.001%" Electronics World February 1998.
Ian Hickman published three in WW and EW, based on State Variable Filters.
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Old 21st May 2009, 01:21 PM   #9
EUVL is offline EUVL  Europe
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May I have a copy as well pls ?
Pls PM me via the forum, and I shall send you my email address.


Many Thx,
Patrick
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Old 21st May 2009, 07:51 PM   #10
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Scans received, many thanks to Spirtos.

Quote:
Originally posted by forr
Linsley-Hood published four distometers at least.
According to his claims, his best performers were :
"Spot-frequency distorsion meter", Wireless World, July 1979.
"Distorsion meter" ETI, January, Frebruary and March 1985.
"Measure THD to 0.001%" Electronics World February 1998.
Ian Hickman published three in WW and EW, based on State Variable Filters.
Other JLH THD meters were:

"Portable Distortion Monitor", WW July 1972
"A sensitive spot-frequency distortion meter" HFN-RR June 1975

The ETI project includes a spot frequency sine wave oscillator and straight millivoltmeter to make a compact test set. I built mine because I couldn't afford a Lindos box!

Colin
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