JLH Distortion Meter in ETI

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SoundOff

SoundOff

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Joined 2002
#1
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
 
#8
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.
 
#10
Scans received, many thanks to Spirtos.

forr said:
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.
Click to expand...

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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