Sugden P51 schematic

vaslejean · 24th October 2011, 06:33 PM

Hi Everyone,

I need to get my hand on the schematic of the Sugden P51 amplifier as I have an old Sugden A21 series III wich would apparently be built upon this same topology for its power output section.

Would anyone be able to help me on this ? I have looked over the web with no success.

Thank you in advance.

seebert · 25th October 2011, 02:54 AM

Hi Vaslejean, I know it's a long shot but it may be worth sending an email to Lintone Audio in Gateshead, Tyne & Wear, UK. They did a lot of work (and sold a lot) of the Sugden amplifiers back then. The owner is very much still in business and the store is on eBay as seller lintoneaudio. I'm in no way related to the store (I live in the USA) but when living in the UK I spent a lot of time in that shop and if they can help you I know they will. Very, very nice people. Best regards, Mike.

vaslejean · 25th October 2011, 03:32 PM

Thank you Mike,

I have just sent them an email, I'll just wait hoping they can help.

seebert · 25th October 2011, 05:29 PM

You're very welcome, I hope they can help. I had a lot of hi-fi gear back then and used to change it just about every week ... and I did have the Sugden amps for their Class A sound, they're very sweet and non-fatiguing to listen to. I'll be looking for the schematic everywhere I can too - if I find it I'll PM you. In the meantime the best of good fortune and my best regards, Mike.

seebert · 06:36 PM

Hi Vaslejean, I found these on the great site : Audio Circuit Denmark under Free schematics and service manuals - Sugden A48 and A51 ... maybe of some help I hope. I've uploaded the A51 in pdf here .. the A48 was too big to upload but it is on the dk site and has a bigger schematic.

Best regards, Mike.

vaslejean · 27th October 2011, 08:49 PM

Thank you Mike.

Neither of these topology are close to what I have, the A51 is pure class A and the A48 MKII is A/B with about 78 volts dc on it's output section, I had a A48 MKII a few years back it was not bad, but it was not better than a Quad 303 properly set-up by comparison.

It does however use the same output device has my A21. I will keep searching, thank you again, I tought DK-Circuits website was off-line and gone since a while it is good to know it's still there.

seebert · 28th October 2011, 12:53 AM

Sorry, the P51 wasn't an amp that I got to use, but I'll still keep my eyes open for a schematic: hopefully Lintone may help.

Quote:

I had a A48 MKII a few years back it was not bad, but it was not better than a Quad 303 properly set-up by comparison

I'm pleased now that I never got to play with an A48 if that's the case - to my ears the 303 (yes I did own one, then a 405, then my first Naim) was very veiled and 'thick' ... and the strongest memory I have of them was a soggy bass that no speaker could correct: funny isn't it that the very first Quad I ever had was the Pre 22 with II valve power amps and the Quad ESL 57 ... I think the 57 if memory serves ... that was back in 1955 or so and loved it. What's even more funny (not) is that I couldn't afford to buy the same outfit today 55 years later

Michel · 12th November 2011, 05:21 PM

Bonjour vaslejean,

Here is the schematic of the Sugden P51 you are looking for.
If you need the manual and images I took from an actual unit just send me your email address.

Best regards,

Michel

seebert · 12th November 2011, 07:19 PM

C'est très gentil à vous Michel! The spirit of helping others is obviously alive and well.

Best regards,

Mike.

Michel · 23rd December 2011, 03:31 PM

Here is the component list I forgot to include in an earlier thread with the Sugden P51 schematic.

Enjoy!

24th October 2011, 06:33 PM	#1
vaslejean diyAudio Member Join Date: Oct 2006	Sugden P51 schematic Hi Everyone, I need to get my hand on the schematic of the Sugden P51 amplifier as I have an old Sugden A21 series III wich would apparently be built upon this same topology for its power output section. Would anyone be able to help me on this ? I have looked over the web with no success. Thank you in advance.

27th October 2011, 08:49 PM	#6
vaslejean diyAudio Member Join Date: Oct 2006	Sugden A51 schematic Thank you Mike. Neither of these topology are close to what I have, the A51 is pure class A and the A48 MKII is A/B with about 78 volts dc on it's output section, I had a A48 MKII a few years back it was not bad, but it was not better than a Quad 303 properly set-up by comparison. It does however use the same output device has my A21. I will keep searching, thank you again, I tought DK-Circuits website was off-line and gone since a while it is good to know it's still there.

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25th October 2011, 02:54 AM	#2
seebert diyAudio Member Join Date: Sep 2011 Location: Colorado	Hi Vaslejean, I know it's a long shot but it may be worth sending an email to Lintone Audio in Gateshead, Tyne & Wear, UK. They did a lot of work (and sold a lot) of the Sugden amplifiers back then. The owner is very much still in business and the store is on eBay as seller lintoneaudio. I'm in no way related to the store (I live in the USA) but when living in the UK I spent a lot of time in that shop and if they can help you I know they will. Very, very nice people. Best regards, Mike.

25th October 2011, 03:32 PM	#3
vaslejean diyAudio Member Join Date: Oct 2006	Thank you Mike, I have just sent them an email, I'll just wait hoping they can help.

25th October 2011, 05:29 PM	#4
seebert diyAudio Member Join Date: Sep 2011 Location: Colorado	You're very welcome, I hope they can help. I had a lot of hi-fi gear back then and used to change it just about every week ... and I did have the Sugden amps for their Class A sound, they're very sweet and non-fatiguing to listen to. I'll be looking for the schematic everywhere I can too - if I find it I'll PM you. In the meantime the best of good fortune and my best regards, Mike.

12th November 2011, 07:19 PM	#9
seebert diyAudio Member Join Date: Sep 2011 Location: Colorado	C'est très gentil à vous Michel! The spirit of helping others is obviously alive and well. Best regards, Mike.

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