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3rd Feb 2023, 4:33 pm
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#21 |
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Hexode
Join Date: Aug 2009
Location: Blackpool, Lancashire, UK.
Posts: 311
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Re: Bush PB63.
It may be of interest to you, that when I restored my "Bush PB63" some years ago, I found I could get a worthwhile increase in the bass response, by increasing the value of the interstage coupling capacitor, between the valves :- '354V' and 'AC044', from 0.01uF to 0.022uF. All other coupling/decoupling paper and electrolytic capacitors when changed, were to manufacturers value specs., or the nearest preferred values to them.
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If you live, the chassis was dead; if you're dead, the chassis was live !!!! |
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4th Feb 2023, 7:13 pm
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#22 |
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Octode
Join Date: Aug 2006
Location: Willington, County Durham, UK.
Posts: 1,499
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Re: Bush PB63.
Thanks for the tip. I will do the mod, Malc.
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Malc Scott |
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