From: franklucas.usa@gmail.com   
      
   On 23/04/2017 23:46, Peter Wieck wrote:   
   > The answer is pretty basic as you found:   
   >   
   > Modern off-shore 5AR4s are crap. They will not pass enough clean DC current   
   for the amp(s) to operate properly.   
   >   
   > There are after-market solid-state 5AR4s which are adequate, far better than   
   the Chinese/Russian garbage. Search for "WEBER COPPER CAP", and you will find   
   the one with the best reputation *and* a built-in delay.   
   >   
   > And there are delay boards (15 seconds is suggested) that may be had as   
   well. Neither of these devices likes short-cycling, so do understand that   
   before investing in them.   
   >   
   > The most common mod on the Weber is to remove the cover, ventilate it, and   
   then put it back. They get HOT!   
   >   
   > Peter Wieck   
   > Melrose Park, PA   
   >   
   >   
      
   I've read lot of positive reviews about Matsushita nos 5ar4/gz34 made   
   using Mullard machines. Maybe I'll try them one of these days.   
   I'd like to build some solid state rectifiers using some resistor to   
   simulate the voltage drop typical of a tube rectifier to leave the amp   
   circuit untouched in the bias voltage section but I'd also like to build   
   them with some kind of soft start to avoid the standby switch.   
   I really want to know what's inside those Webers ...   
      
   Frank   
   Florence, Italy   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)