Stan Curtis site

Bonsai · 12:28 AM

I posted this up over on the Solid State forum, but I think its relevant here as well.

I found this site while rooting around. Fascinating site with a lot of history about the UK hi-fi industry over the last 30 years or so. I knew Stan Curtis was a prolific audio writer and designer, but I has no idea he was that involved on the business side as well, and responsible for some iconic products over the last few decades. A great read.

Stan Curtis, the hifi guru, introduction

Mooly · 29th November 2011, 07:08 AM

Thanks Bonsai.

As you say, a good read. I remember the Stan Curtis CD players getting rave reviews at the time.

Bonsai · 29th November 2011, 08:59 AM

Yes, he is probably the UK's #1 audio guy in terms of experience in the industry. The story about the Cambridge amps is very good - I remember seeing the P30 (or was it P60) when I was about 18 and drolling over it - but out of my budget unfortunately.

forr · 29th November 2011, 10:45 AM

I think Cambridge inaugurates the low profile style, its first amp came on the market prior the first Mark Levinson phono preamp, I think. They bear some ressemblance :

Parasonic · 29th November 2011, 11:00 AM

Thanks Bonsai, it's great reading

Terry

Bonsai · 29th November 2011, 11:40 AM

Yes there is a resemblance there that's forr sure!

Marra · 29th November 2011, 12:45 PM

For some reason the Stan Curtis info comes up with Can't find server message.

Bonsai · 29th November 2011, 01:03 PM

I just tried the link above- its working ok.

Mooly · 29th November 2011, 01:09 PM

It would be interesting to see the circuit details for these old timers if anyone has them.

I see mention of driving a squarewave into a 10mf ??? (uF

) with no overshoot or ringing.

forr · 29th November 2011, 01:32 PM

Quote:

Originally Posted by Mooly

It would be interesting to see the circuit details for these old timers if anyone has them.

I do have the schematics of the P40 - 20W amp and its preamp.

Quite unconventional, this last one. It used a cascade of three virtual ground stages. The first one having a 47 kOhm in series (just like some Linsley-Hood phono preamps) and a gain control pot to avoid any overload. The second one incorporates a mono-stereo switch and the third one deals with the RIAA equalisation.

The amp has a single rail -55V power supply with a single transistor input, a VAS load by a CCS which current of can be nulled by an electronic switch in case of output overcurrent. The output stage is made of darlingtons PNP (2*2N4289 in parallel for the driver, MJ491 for the power) and NPN (1*2N4286 for the driver, 2N5037 for the output).

If interested, I can scan them

Quote:

I see mention of driving a squarewave into a 10mf ??? (uF

) with no overshoot or ringing.

Probably quite rounded rendition.

29th November 2011, 12:17 AM	#1
Bonsai diyAudio Member Join Date: Aug 2006 Location: Taipei, Taiwan	Stan Curtis site I posted this up over on the Solid State forum, but I think its relevant here as well. I found this site while rooting around. Fascinating site with a lot of history about the UK hi-fi industry over the last 30 years or so. I knew Stan Curtis was a prolific audio writer and designer, but I has no idea he was that involved on the business side as well, and responsible for some iconic products over the last few decades. A great read. Stan Curtis, the hifi guru, introduction __________________ bonsai http://www.hifisonix.com/ Last edited by Bonsai; 29th November 2011 at 12:28 AM.

29th November 2011, 07:08 AM	#2
Mooly diyAudio Member Join Date: Sep 2007	Thanks Bonsai. As you say, a good read. I remember the Stan Curtis CD players getting rave reviews at the time. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

29th November 2011, 08:59 AM	#3
Bonsai diyAudio Member Join Date: Aug 2006 Location: Taipei, Taiwan	Yes, he is probably the UK's #1 audio guy in terms of experience in the industry. The story about the Cambridge amps is very good - I remember seeing the P30 (or was it P60) when I was about 18 and drolling over it - but out of my budget unfortunately. __________________ bonsai http://www.hifisonix.com/

29th November 2011, 11:00 AM	#5
Parasonic diyAudio Member Join Date: Dec 2009 Location: Suncoast	Thanks Bonsai, it's great reading Terry __________________ 72 degrees and sunny

29th November 2011, 11:40 AM	#6
Bonsai diyAudio Member Join Date: Aug 2006 Location: Taipei, Taiwan	Yes there is a resemblance there that's forr sure! __________________ bonsai http://www.hifisonix.com/


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29th November 2011, 10:45 AM	#4
forr diyAudio Member Join Date: Dec 2004 Location: Next door	I think Cambridge inaugurates the low profile style, its first amp came on the market prior the first Mark Levinson phono preamp, I think. They bear some ressemblance :

29th November 2011, 12:45 PM	#7
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	For some reason the Stan Curtis info comes up with Can't find server message.

29th November 2011, 01:03 PM	#8
Bonsai diyAudio Member Join Date: Aug 2006 Location: Taipei, Taiwan	I just tried the link above- its working ok. __________________ bonsai http://www.hifisonix.com/

29th November 2011, 01:09 PM	#9
Mooly diyAudio Member Join Date: Sep 2007	It would be interesting to see the circuit details for these old timers if anyone has them. I see mention of driving a squarewave into a 10mf ??? (uF ) with no overshoot or ringing. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

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