SET Asylum

Posted by dave slagle (M) on September 09, 2016 at 05:55:53

In Reply to: RE: What tubes to use with this Interstage Transformers? posted by megasat16 on September 08, 2016 at 14:30:21

You seem to be completely missing the application here. The ultimate function generator in this particular situation is a tube with an Rp of 5K amplifying the random signals we call music. This is what needs to replicate for a precursory test.

You mention your ideal for a function generator being an amplifier with a feedback loop yet this actual application doesn't meet that criteria so I guess we now need to wrap feedback around our tubes to make them work properly.

Back to the original task, the 5K series resistor will work perfectly for this application. It may show issued in different applications however this is not about designing a universal device it is about testing a very specific application. The main thing of interest is to determine the primary inductance of the DUT to see what tubes it is suitable for loading across the audio band.

dave