Spectrum 128k +2 (Gray) - 78S05 Power Regulator Replacement

wmsteele

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I have a very hot running +2 spectrum, having searched everywhere for a suitable 5v 2a switched regulator without luck would THIS make a good replacement for the original 78S05 regulator?

If it is suitable how would this be connected to the three points of the existing 78S05 (once removed) :help:

Or, can anyone recommend a suitable (UK, in stock) alternative.

Many thanks, -Will
 
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TheCorfiot

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Hi Will

The 78S05 is a 2Amp device so it's very suitable for the Soectrum +2
I would be very hesitant to add a switch mode regulator as it may cause screen interference.

:)
 

wmsteele

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The existing 78S05 is still fully functional... the motherboard has been transplanted in to a small custom case (+2 minus tape deck!) where the original heat-sink wont really fit (although I have taken the hacksaw to it!). This has resulted in alot of heat building up in the case, that's what sent me in search of a replacement. If a switched regulator isn't as good idea (don't want to cause any display issues) it there an alternative, what about a higher rated regulator?

- - - Updated - - -

What about... 78T05 (5v@3 amp output)
 
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roy_bates

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just bolt the regulator to a thicker piece of aluminum,job done.


thats what i would do anyway.
 
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