1. L

    Cyrus 1 amp

    Hi, anyone know how to determine the polarity of old Elna caps? They are orange electrolitics but have no indication of the negative side. Thanks Stuart
  2. 4

    How to find a blown cap?

  3. K

    Help with a noisy NAD 216

    Hello all, i have a problem with an amplifier and hope someone can help me with some advise. The amp has two problems. First when you turn it on the relay didnt clicks and the protection led keeps on. Ok, i know most nads amplifiers fail that...