Colin Wonfor

Above is the crook and is wife. Hello all I hope you are all well. Some of you want information on my new and old products plus odd bits. They can all be found here, you will need to sign on then feel free to download. Odd and new all new Yes all new Have fun be safe enjoy the music.

Both were based on the MF250 and MP and MC 250 I did at Magnum.

Hello too

Setting bias I have learnt for FET amps is a bit hit or miss. I load the amp with the current set to zero on the pre-set. Then a 10KHz signal is plug in so the the 8 Ohm load RESISTOR has just 2 Volts Pk-Pk You can then clearly see the Cross Over distortion on a scope. Adjust the pre-set with care until the distortion is gone, keep a careful monitor of the heat sink temperature and it is best a a ambient of 25C The Amp will sound amazing and run slightly warm and low levels. I hope this helps? Best Col

Hi I did this design in the late 1970,s it is a Complementary Common Base stage the original chip had matched transistors , but when A.C Magnum and I parted Tony wanting to make more money replaced them, to be honest shit transistors without thermal sharing substrates , a bad move Relph. Noise lept up and so did the distortion.

The above statement is not quite correct:- Sorry No, this is wrong, Magnum was formed from my company MIH, which became Pro-Ac Magnum, then Tony Relph joined me as a business guru, then after 3 yrs managed after locking me out after a holiday stole the company and I was force to take legal action for use of some patents. and stealing my company. Meanwhile I started Inca Tech producing no electronics until the legal action was resolved but the world first Gold Plated Power Connectors for the audio world, now be warned never share a company 50/50 if you have started it you partner may not be so trustworthy as you. And for folk out there here is a rough list of other things I have designed. In order:- Pushpull 1 Germanium Amp 1971 V1 Tube amp 1972 12W Single Ended A Class 1974 MIH 100W 1975 MIH 400W ProAc stereo 100w 1980 ProAc 3 Channel 100W Magnum A100, 400W 1982 Magnum A200 Magnum Pre-amps IncaTech Gold Plated Power Plus and Sockets 1982 Inca Tech Sabre iss 1 1983 Inca Tech Prelude Inca Tech Claymore 1 1983 Inca Tech Claymore Gold Inca Tech Claymore S Inca Tech Claymore 2 Inca Tech Quatra Inca Tech FMT Tuner Inca Tech IT50,IT100,IT200 Inca Tech IT1P preamp Inca Tech Sabre iss 2 Inca Tech Dirk Inca Design ID25,ID50,ID75 Inca Tech MSB (a monster) Inca Design Oberon Classic Inca Design Oberon (standard) Lescon Quatra Oxford Acoustic's "Mystic" TOCA SECA 20W,50W,100W,200W,300W single ended class A,s 1995 TOCA I75 TOCA Pre A TOCA 75W Tellurium Q Cables 2009 Tellurium Q, A Class 20W, 100W 2011 Tellurium Q Headphone/Phono Amp Tellurium Q Pre-Amp EWA (Elsdon Wonfor Audio) A complete range of new designs after yet another twit full of greed stole by waiting for me to become very ill yet another company from my original company called Catch 22 then it became Tellurium Q. EWA have cables, Power Amps, Pr-Amps, SECA Amps. Read on:-http://seca.freeforums.net/ https://www.elsdonwonforaudio.com/ Products worked on Naim Nait 5i, other bits also for Naim and Cambridge Audio. 2008- 2010