Cyril Bateman's site

[tunneldiode]

I too, remember Cyril Bateman's excellent articles in EW.
I've found another site hosting them.
Capacitor Sound
I've got my originals somewhere; must dig them out.

 

[Analogbuff]

Mrupp, you may be right about the copyright.
But the work is very worthwhile reading and should be safeguarded in some form.
with Cyril´s own website suspended-
Anyway the scannings are not easy to read, some parts are not readable at all ,
After the EWW publishing Cyril Bateman´s capacitor work was later made available on CD´s directly from him, with some extra material beyond the EWW articles.
I heard from him on 13/2-2011.

 

[mediatechnology]

I've posted scans of the original Wireless World articles here. If your browser does not jump to the third post scroll down for the links.

Pro Audio Design Forum • View topic - Cyril Bateman Capacitor Sounds Archive

 

[mediatechnology]

This link may work better:

Pro Audio Design Forum • View topic - Cyril Bateman Capacitor Sounds Archive

 

[EUVL]

> My last contact with him was mid-December. I'll try to raise him.

Any success Jan ?
I am interested in purchasing his PCBs for sine generator and notch filter.


Cheers,
Patrick

 

[jan.didden]

> My last contact with him was mid-December. I'll try to raise him.

Any success Jan ?
I am interested in purchasing his PCBs for sine generator and notch filter.


Cheers,
Patrick

Yes, I am in contact with him.
I will PM you.

jan

 

[raul_77]

http://web.archive.org/web/20091027...s.com/cyrilb2@btinternet.com/downloads_5.html

Happy days, Raúl Couto

 

[tommy1000]

The articles describes how to measure distortion in capacitors.
Has anyone built the generator and notch filter and found them useful?

 

[mediatechnology]

There's a recent article in Test and Measurement World where the author cites Bateman's work and provides his own design as well as a notch filter for A/D testing. I found this to be a very interesting read.

"Low distortion oscillator tests measurement circuits," Vojtěch Janásek, JanasCard, Test and Measurement World, May 3, 2012.

Low distortion oscillator tests measurement circuits | TMW

 

[tommy1000]

Thank you, very helpful.

 

[forr]

The articles describes how to measure distortion in capacitors.
Has anyone built the generator and notch filter and found them useful?

Hi,
I built it, tt was a very ambitious project for me but I ended with success.
The settings of the adjustable resistors and calibration of the lot with the sound card were not easy, they may need new trims form time to time.
I sometimes get a burst of the 4th harmonic but did not identify its origin.
The amplitude stabilization using an opto-coupler like Janacek did seems to me preferable.
I did not measure caps with it yet, I mainly use it to check performances of amplifying circuits.

 

[tommy1000]

Thank you for sharing this information.