[Texasrocker]

Congrats finding the #36 tube problem! Sometimes, something as simple as swapping identical tubes in different sockets on same chassis' reveal weak tube problems indeed. Tube testers can lie also, nomatter how expensive models they are. Even the high dollar Hickok tube testers lie!The best test for any tube is testing in the circuit it is designed to work where correct voltages are applied. About 10 yrs ago I got tired of running across weak tubes and waiting for new ones to arrive. I started ordering 2 extra of most every common type ( I thought) tube I ordered to have extras and save on shipping costs. I have hundreds of nos tubes now and every once in awhile my new backstock has what I need onhand. But I still have to play the waiting game on getting new tubes even though I try to keep most in stock. Frustrating indeed, especially when waiting on nos tubes for customers sets! I need to move my shop next door to AES, or Bob Dobush at findatube so I can walk and get what I need when I need it. (ha!) I don't like Ohio winters!! Frustrating indeed! Out of all the hundreds good tubes I have here, there is always one or two oddballs that I don't have in stock when I need them "now"! Murphys Law? You bet! Ohms Law always works, until Murphy's Law shows up to spoil the party!!