Tube Amplifiers
magnumwrestler asked:

L? are many types of preamp tubes, and if I wanted to try a whole load of them out just by switching in and out of the socket of the nine-pin, should I change c '? ne of the links? or all of the nine-tube pivot using the same provision of the pin?


2 Comments so far

  1. billrussell42 on July 14, 2009 11:13 am

    no. they vary. Similar tubes may share a common pinout, but you don’t know for sure until you look up the datasheets on both.


  2. Technobuff on July 15, 2009 6:18 pm

    You want to improve the performance of an existing preamp circuit?
    I’m sure the manufacturer would have already optimised the circuit and values around a specific valve for the purpose it was intended for.
    No, pinouts and even number of elements in a valve varies, also internal element connections may be different or even non- existant.
    If you’re lucky, the filaments may be wired the same.
    I seriously doubt you would gain anything trying to “re- invent the wheel”.

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