You can make a little probe with a ground and a hot on alligator clips that plugs into the headphone output of a small fm radio, ghetto fabulous sig gen. Then you are not trying to play guitar at the same time with your hand on the strings and in the power section
*hijack on*I find that my Hickok 533 is excellent at testing small tubes for function and transconductance, and for wear with the "life" test. It really helps eliminate the situation with one or more bad preamp tubes being swapped back and forth (regardless if they are nos or used or new production shiite ) in a guitar amp with 4+ 12a*7's. There's a high likelihood that those tube failures were caused by insertion and removal at some point while troubleshooting.
A functioning transconductance tester like my 533 is useful in testing NOS and and used and new production power tubes for transconductance and life. You can easily tell when its' time to replace power tubes. I run large tube power amplifiers 24x7 and test tubes only when necessary as the voltages they put on the elements can be hard on tubes. *hijack off*
Excellent thread so far! hope you get 'er straight.
Pete
*hijack on*I find that my Hickok 533 is excellent at testing small tubes for function and transconductance, and for wear with the "life" test. It really helps eliminate the situation with one or more bad preamp tubes being swapped back and forth (regardless if they are nos or used or new production shiite ) in a guitar amp with 4+ 12a*7's. There's a high likelihood that those tube failures were caused by insertion and removal at some point while troubleshooting.
A functioning transconductance tester like my 533 is useful in testing NOS and and used and new production power tubes for transconductance and life. You can easily tell when its' time to replace power tubes. I run large tube power amplifiers 24x7 and test tubes only when necessary as the voltages they put on the elements can be hard on tubes. *hijack off*
Excellent thread so far! hope you get 'er straight.
Pete
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