Friends playlist #01

A collection of tracks that I like, and listen to and that fit neatly onto a CD-R. In each instance, each of the CDs from which these selection of tracks are drawn are well worth buying i.e the quality of the performance is representative of the rest of the original CD. ======= 01 “I Can’t […]

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COLIN WONFOR: Q&A regarding their new HB100 mono power amps

HP: Gentlemen, you’ve been designing amps and preamps for over 30 years. Is it still a challenge and ….. are you having fun? A: Colin has been designing electronic professionally for over 40yrs. He has done this for a living. His many designs include power control and power supplies Linear, Resonate, Switch Mode and even […]

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Tim De Paravicini: Talking about transformers in his valve amps

There are so many ways power transformers are made. I on all my valve power amps design my power transformer so that a low voltage secondary winding behaves as an electrostatic screen so either mains terminal end of the primary winding behave about the same. The leakage voltage and current you are talking about as […]

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My office & holiday playlist:

I got a call a day back asking me, among many other things, for an idea of what I might like to listen to. Something that could withstand repeated plays. My first response was to look at one of my play lists when I was an exhibitor at the 2008 Heathrow High Fidelity Show. On […]

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LFD AUDIO: MCT phono stage and the very rare MCT ‘transformer coupled’ version – clarified by Dr. Richard Bews

What is the difference between the MCT phono stage and the very rare MCT ‘transformer coupled’ version? All MCT are transformer coupled (“T” in MCT). There is a (SE) version where the MAINS transformer is much larger (it retails for about £4k), also there is a slight change to a passive component. This gives more […]

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COLIN WONFOR: Microphony, fact or fiction?

Colin. I appreciate your no-bullshit approach to providing answers. I am counting one now because I cannot get a credible answer elsewhere re microphony in amps. I appreciate that all objects vibrate and each has a fundamental mechanical resonance. So if microphony affects the sonic performance, then how and why – in general? How would […]

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