The Amp Garage

The strange looking plate curves may be oscillation. I guess you could try shortening your leads or adding ferrites. Good to know. Don't have any ferrites for now. I expect to order them when I get round to boxing the PCB. That may be some time given my lack of construction skills but I will update...

Hi again.
See attached plots for the 12AT7 test.
In fact the Gm is not as low as I suggested.
I think these are just weak(old ?) tubes. Paul

As long as the leads from your socket to the uT ASGK terminal block are short, you should be fine. Are you only looking at Quick Test results? If so, try tracing a full set of curves and see if they are well behaved. Hi Martin and thanks for the reply. The leads are roughly three inches long I woul...

Hi there. Only recently discovered the uTracer so managed to get myself on the list for the uTracerNXT. Now built (thanks to Ronald for assisting me with some issues I had during the testing) and running well it seems. I am using an old Mac (running High Sierra) so I first of all managed to get the ...