CHAMP ELECTRONICS -" THE VINTAGE VALVE AMP HOSPITAL"

NOTTINGHAM, ENGLAND

 

SERVICING A SELMER ZODIAC TWIN 30 COMBO AMPLIFIER


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I just love the Zodiac Twin 30’s & 50’s. They are great sounding amps!



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It’s amazing how many combo’s of all different makes come through the workshop with the speaker nuts either half un-done or even missing!



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Same thing applies to the baffle nuts too. Here one is missing and another very loose! Loose speaker/baffle nuts can noticeably discolour the sound of an amp. A quick check-up all-round and a spot of “Loctite” works wonders!




 

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Here we go again….Do I really need to say anything? On first removing this power section I really had to laugh. Some "technician" (!!!???) has mounted the smoothing cap bracket the wrong way around. How can anybody possibly be that stupid?






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Though the output transformer was fine & correct, I got the feeling that it had been replaced at some point? Check-out the dreadful soldering and….just three self-tap screws holding it to the chassis.....which were all loose! The transformer was just simply rattling about!
 

  

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This is how loose it was!
  

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Moving on to the power transformer, this too was correct and fine, but……someone has mounted it on its side!



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And now the reason for the self-tap screws. This is because the so-called "technician” can’t be arsed to remove all the wires & main board in order to get to the correct way of mounting…….using nuts & bolts!



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All finished - the power transformer now mounted up-right, the output transformer secured correctly & re-wired, together with two missing tubes replaced.



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I think this looks a little better! Oh yes….and by the way…..I have put the smoothing cap's retaining clip on correctly now!



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Tidy and everything secured correctly.



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The pre-amp required the normal duff component changes. Note the multi-core anchorage……a piece of twine!



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Four new jack-sockets fitted, a few components, and a secure anchorage for the cables.



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There were only two screws holding the power section in the case and…..you guessed it……these were self-tap screws too! Now securely fitted with the correct 2BA brass screws, large washers etc. and also four new feet fitted.



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That’s about it folks. Note the two 12” Goodmans drivers, labelled-up especially for Selmer…….nice!


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The owner of this baby loves it to bits and swears by it for recording…..I don’t blame him one iota!






 


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