Older MC2 Amplifiers unserviceable?

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   I was browsing through the MC2 Audio website and found this 
Obsolete Units Notification – As Of Jan 2018
Please note that, due to obsolescence of many parts of older 
amplifier designs, we can no long service or repair the following 
models:

MC 450, MC650, MC750,MC1250

TQ440, TQ425  (Turbosound branded MC Series)

AP800, AP1300 (Quested branded MC Series)
We still have a limited supply of some spares, so please email to enquire and we will try our best to help!
There are a few of these I have seen recently listed on eBay...
I suppose this is due to the output transistors that are well out of production.

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Xoc1 Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 15 October 2012 Location: Devon UK Status: Offline Points: 397	Post Options Post Reply Quote Xoc1 Report Post Thanks(0) Quote Reply Topic: Older MC2 Amplifiers unserviceable? Posted: 11 February 2018 at 10:02pm
	I was browsing through the MC2 Audio website and found this Obsolete Units Notification – As Of Jan 2018 Please note that, due to obsolescence of many parts of older amplifier designs, we can no long service or repair the following models: MC 450, MC650, MC750,MC1250 TQ440, TQ425 (Turbosound branded MC Series) AP800, AP1300 (Quested branded MC Series) We still have a limited supply of some spares, so please email to enquire and we will try our best to help! There are a few of these I have seen recently listed on eBay... I suppose this is due to the output transistors that are well out of production.

kedwardsleisure Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4947	Post Options Post Reply Quote kedwardsleisure Report Post Thanks(0) Quote Reply Posted: 11 February 2018 at 10:08pm
	they will have their reasons! Output transistors not a problem, things have moved on since these were designed.
	Kevin North Staffordshire

levyte357- Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128	Post Options Post Reply Quote levyte357- Report Post Thanks(0) Quote Reply Posted: 11 February 2018 at 10:42pm
	Hopefully and end then, to the ridiculous asking prices.
	Global Depopulation - Alive and Killing.

dylan-penguinmedia Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 14 April 2011 Location: Brighton Status: Offline Points: 4575	Post Options Post Reply Quote dylan-penguinmedia Report Post Thanks(0) Quote Reply Posted: 12 February 2018 at 8:54am
	Lovely sounding amps, mind...

Pasi Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 25 April 2010 Location: Knutsford Status: Offline Points: 2732	Post Options Post Reply Quote Pasi Report Post Thanks(0) Quote Reply Posted: 12 February 2018 at 9:20am
	They are out of anything related to power supplies in these units. Some other bits and bobs might be around, but for example 1250 PSU is completely out including PCBs.

U.Viktor Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 04 May 2010 Status: Offline Points: 716	Post Options Post Reply Quote U.Viktor Report Post Thanks(0) Quote Reply Posted: 12 February 2018 at 9:32am
	Due to the global shift in power technology to the direction of switching conversion a decade ago, needs of linear devices have sharply declined. Semiconductor suppliers have cut production volumes, discontinued most of the power MOSFET, bipolar transistors and darlingtons for linear amplifiers. They have focused to more modern, faster and faster switching devices. Be prepare that ALL of these power devices are going to disappear on the markets very soon. It will make most of conventional (non switching) amplifiers UNREPAIRABLE!

dylan-penguinmedia Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 14 April 2011 Location: Brighton Status: Offline Points: 4575	Post Options Post Reply Quote dylan-penguinmedia Report Post Thanks(0) Quote Reply Posted: 12 February 2018 at 9:45am
	Looks like my time to grab a smaller MC series bargain for home use is coming up! Won’t be used at war volume, or bashed around in a van, so should last longer in a more sympathetic environment.

kedwardsleisure Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4947	Post Options Post Reply Quote kedwardsleisure Report Post Thanks(0) Quote Reply Posted: 12 February 2018 at 9:45am
	luckily the mc power supplies are pretty reliable. Nothing out of the ordinary apart from the winding switcher on the 1250
	Kevin North Staffordshire

kedwardsleisure Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4947	Post Options Post Reply Quote kedwardsleisure Report Post Thanks(0) Quote Reply Posted: 12 February 2018 at 9:59am
	they're built like tanks anyway.
	Kevin North Staffordshire

Sirius Sounds Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 19 March 2017 Status: Offline Points: 54	Post Options Post Reply Quote Sirius Sounds Report Post Thanks(0) Quote Reply Posted: 12 February 2018 at 11:11am
	Three 1250, two 650 and a 750 here. Not really what i wanted to hear!

kedwardsleisure Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4947	Post Options Post Reply Quote kedwardsleisure Report Post Thanks(0) Quote Reply Posted: 12 February 2018 at 2:02pm
	can't think of anything specifically. Mains transformer maybe, but I've never had one go. The thing with many uk manufacturers is that they often use off the shelf parts. The big capacitors possibly, but never had those go either.
	Kevin North Staffordshire

Spanda Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 08 July 2019 Location: Byron Bay Status: Offline Points: 3	Post Options Post Reply Quote Spanda Report Post Thanks(0) Quote Reply Posted: 08 July 2019 at 3:03pm
	Good of bad idea to buy a cheap 650 that’s not powering on? Can solder well, ok at diagnosis. Advice appreciated, love to have a working one!