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  • Beloab 150 / Penta Upgrades

    Hi all I've decided to carry out some work on my ageing Beloab 150 amps / Pentas. They were originally Beovox Penta Mk1's to which I later added Beloab 150's when they turned up. Anyway they have given good service over the years - and they are currently running cool. I feel though they are...
    Posted to The Workbench (Forum) by machineage on Sat, Mar 22 2014
    Filed under: Penta, capacitors, Opamp, Beolab 150
  • Penta - when is a bipolar not a bipolar?

    Just about to recap two pairs of Penta 1s and have four pcb 14 and four pcb 15s to compare. They are all in beautiful condition with no leaking capacitors or burned-out resistors - which makes me wonder if it it even worth recapping - is there a scientific way to test them? Surprisingly, the electrolytics...
    Posted to The Workbench (Forum) by westy12 on Tue, Dec 31 2013
    Filed under: Penta, recap, Circuit boards, Bipolar
  • Beolab Penta MK1 - Blow Out

    Hi Just acquired a pair of Mk1s - One of the them had been battered in a move (few visible small dents in steel paneling) and the owner said the amp blew when he tried to use it (Using a BC9500. He said it smoked). Listened with a direct connection (bypassing the amp) and one of the woofers was distorting;...
    Posted to The Workbench (Forum) by Jamian on Mon, Jan 14 2013
    Filed under: 13cm, speaker, woofer, 6603, Penta, Beolab, distortion, blown, MK1
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