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MickMcmichael · 7th Jan 2013, 9:55 pm

The Amstrad Integra 4000 amplifier - my first "proper" hi-fi. Saved up for it from doing paper rounds when I was 13 but always saved some back for my 25p entrance fee to Peterborough Speedway on Fridays!

But it went wrong. The left hand channel packed up after using it for a school disco, attached to speakers mounted inside discarded bedroom furniture drawers!

Oh dear.

I wrote to Amstrad and they sent me a copy of the circuit diagram and I eventually fixed it ( a 2SD234 TIP type output transistor ) and all is still well to this day.

A really pokey little 12W per channel amplifier which I still use. I've still got the circuit diagram if anyone wants or needs a copy. Bloomin' noisy mains transformer but who cares eh!

The year (not yet mentioned) was 1972. The Amstrad Integra 4000 was always involved in a sales battle with the Teleton GA202. Both amp's had "sliders" and were both priced similarly - around £22 at the time. Just thought I'd mention it.

7th Jan 2013, 9:55 pm	#7
MickMcmichael Pentode Join Date: Mar 2009 Location: Peterborough, Cambridgeshire, UK. Posts: 196	Re: Amstrad Integra 4000 amp The Amstrad Integra 4000 amplifier - my first "proper" hi-fi. Saved up for it from doing paper rounds when I was 13 but always saved some back for my 25p entrance fee to Peterborough Speedway on Fridays! But it went wrong. The left hand channel packed up after using it for a school disco, attached to speakers mounted inside discarded bedroom furniture drawers! Oh dear. I wrote to Amstrad and they sent me a copy of the circuit diagram and I eventually fixed it ( a 2SD234 TIP type output transistor ) and all is still well to this day. A really pokey little 12W per channel amplifier which I still use. I've still got the circuit diagram if anyone wants or needs a copy. Bloomin' noisy mains transformer but who cares eh! The year (not yet mentioned) was 1972. The Amstrad Integra 4000 was always involved in a sales battle with the Teleton GA202. Both amp's had "sliders" and were both priced similarly - around £22 at the time. Just thought I'd mention it. Last edited by MickMcmichael; 7th Jan 2013 at 10:06 pm.