Search found 573 matches

by Colin Wonfor
Sun Nov 04, 2018 11:03 am
Forum: General Audio
Topic: See stealing and being a bully does pay kids.
Replies: 21
Views: 2461
Great Britain

Re: See stealing and being a bully does pay kids.

Well at long last I have managed with help to start the EWA25 cables up again.
You chap out there that helped many many thanks.
by Colin Wonfor
Sun Nov 04, 2018 10:59 am
Forum: General Audio
Topic: Windsor HIFI Show
Replies: 45
Views: 1826
Great Britain

Re: Windsor HIFI Show

Could you take and post pic's please?
by Colin Wonfor
Thu Nov 01, 2018 1:52 pm
Forum: Elsewhere on the Web
Topic: AoS
Replies: 17538
Views: 993878
Great Britain

Re: AoS

As a mater of interest the PSU:-

100,000 Amps cont
150,000 Amp peak for 30secs
55V-65V
5mV ripple at 100KA
Transformer 7 Tons
Caps 470 Farad
440VAC 3 Phase input

3.5M High, 2.5M Wide, 4.6M deep

A toy one for NOT USB
by Colin Wonfor
Thu Nov 01, 2018 1:43 pm
Forum: Elsewhere on the Web
Topic: AoS
Replies: 17538
Views: 993878
Great Britain

Re: AoS

FROM Mr Lurcher "From my standpoint, I think having to parallel up 12 output devices does as much or more sonic damage than the issues with going from A to B." I am sorry but this statement is not always correct, I used 80 Parallel FET with huge Gate - Source Capacitance and contrary to the market t...
by Colin Wonfor
Fri Oct 05, 2018 10:29 am
Forum: Elsewhere on the Web
Topic: Uncorrected lies on hi-fi forums
Replies: 40
Views: 2468
Great Britain

Re: Uncorrected lies on hi-fi forums

Yes they are lying as we have discussed here before recently, and the lie has been used so much it has become common amoungst hi-fi people. You see the problem is a class B can be biased to simulate class A, which is why it is called class AB, for part of its power range, even up to fairly high lev...
by Colin Wonfor
Fri Oct 05, 2018 10:15 am
Forum: Elsewhere on the Web
Topic: AoS
Replies: 17538
Views: 993878
Great Britain

Re: AoS

The tall 300W is near Salisbury in a huge house, the 200W is in Japan and the 100W is in Germany the small 50W is in Curry Rival Somerset and owned by Mr. Paul Foster he designed the chassis and cut the stone, clever man and he did some fun furniture for the Chelsea Flower shows. Paul Quick and I sa...
by Colin Wonfor
Tue Oct 02, 2018 1:02 pm
Forum: Elsewhere on the Web
Topic: AoS
Replies: 17538
Views: 993878
Great Britain

Re: AoS

Mr Self also did that and tried to use parallel Op-Amps without taken into account input and output tolerance thus lots of Op-Amps died, silly idea to believe chip specs are the same for all the same family. Try the Plessey SL series they are SECA output stages. And you can also use the open collect...
by Colin Wonfor
Tue Oct 02, 2018 10:41 am
Forum: Elsewhere on the Web
Topic: AoS
Replies: 17538
Views: 993878
Great Britain

Re: AoS

As to P-P A, sorry guys but it does have problems in the area of dT and can cause phase changes. Cambridge Audio (Richer Sound) did a 350? with a design from Mr. Self, with a A-B output but with a constant current load in Parallel with the Negative drive output stage, not nice got to hot and was a n...
by Colin Wonfor
Tue Oct 02, 2018 10:25 am
Forum: Elsewhere on the Web
Topic: AoS
Replies: 17538
Views: 993878
Great Britain

Re: AoS

The 300W pair cost in parts and not RRRp would be about £10K now.
1.8M tall 180Kgs each, I published the cct many year ago in WW.
by Colin Wonfor
Sat Sep 29, 2018 6:39 pm
Forum: Elsewhere on the Web
Topic: AoS
Replies: 17538
Views: 993878
Great Britain

Re: AoS

Yep there was a 20W stereo 5 FEts/ch A 50W Mono 15 fets A 100W Mono 30 fets A 200W Mono 45 fets And a huge 300W mono at 180Kgs with 60 Fets Oh each fet had it,s own constant current transistor and the 300W took only 1.8KW when ON https://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/10981614_140662390298930...