[Boatanchors] L-4PS hum

[Joe Roth]

   My L-4PS has developed a hum (buzz). When it's cool and I set the amp
     at low tap (CW) it's quiet. It begins to buzz on the high voltage
     position. Later when it warms up a while, even the low voltage tap
                          causes it to buzz (hum).
   I know it's the transformer. What is my best option? I do not dare try
   to rewind it. New transformers are expensive but its that the best way
                                   to go?
    I hate to throw good money after bad and buy a used transformer from
                               another L-4PS.
     Suggestions? I'm sure many of you have been down this road before.
                            TNX es 73, Joe-WC4R
                                www.wc4r.com
                              www.rothweb.net
                           www.williamsburgwx.com