Marshall Amp Forum - View Single Post - Preamp Tubes?

ts31966 · 05-03-2009, 04:27 PM

It is the V1 tube. Depending on the tube in V1 channel 1 and 2 can sound great but channel 3 will have less gain. The tone of channel 3 is still great but it is like channels 2 and 3 have changed places.

The black plate raytheon tube all do it. I have some black plate sylvania
12ad7's with square getters but they work fine in V1.

Like I said it also happened with a jj 12ax7s with gold pins that I got from Bob at eurotubes. This tube was hand selected for noise, microphonics, and high gain. The test results for each triode is on the box. But when I put it in channel 3 sounds wimpy also.

I really need to get a tube tester so I can quite using my amp as the tube tester.

On a side note I tried a tungsol reissue I got from upscale audio. It sounds pretty good. It is quiet, a little more fizzy than NOS but I would say it one of the best new tubes. The JJ's that came in my amp are very good also. Probably as good as the tungsol reissue. I don't know why those would be better than the one I bought at eurotubes but they are.

05-03-2009, 04:27 PM	#230 (permalink)
ts31966 Junior Member Join Date: Apr 2009 Posts: 17	Re: Preamp Tubes? - Who, What, When, Where, Why, and How? It is the V1 tube. Depending on the tube in V1 channel 1 and 2 can sound great but channel 3 will have less gain. The tone of channel 3 is still great but it is like channels 2 and 3 have changed places. The black plate raytheon tube all do it. I have some black plate sylvania 12ad7's with square getters but they work fine in V1. Like I said it also happened with a jj 12ax7s with gold pins that I got from Bob at eurotubes. This tube was hand selected for noise, microphonics, and high gain. The test results for each triode is on the box. But when I put it in channel 3 sounds wimpy also. I really need to get a tube tester so I can quite using my amp as the tube tester. On a side note I tried a tungsol reissue I got from upscale audio. It sounds pretty good. It is quiet, a little more fizzy than NOS but I would say it one of the best new tubes. The JJ's that came in my amp are very good also. Probably as good as the tungsol reissue. I don't know why those would be better than the one I bought at eurotubes but they are.