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Old 22nd January 2012, 01:26 AM   #1
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Join Date: Sep 2011
Default Tube Rolling a Jolida 202a

Hi,
I bought a Jolida 202a to replace my 26 year old Kenwood Amp. It appears that the 12AX7A that ships with the Jolida amp is too bright and edgy to the point of almost distorting. To give you an idea, it makes your good recordings sound like a low bandwidth mp3 file. I swapped my miniwatt N3 in place of the Jolida. The 3.5wpc minwatt may not go as loud, but it certainly sound better, the sound is much fuller, better frequency response, I have a NOS sylvania 12AX7 and 2 7189 preferred series output tubes that I bought from the tubestore in the miniwatt. I swapped my vintage NOS 12AX7 out for the 12AX7A that was in the Jolida. I was able to verify that's where the terrible "nails on the chalkboard" was coming from. So I ordered Sylvania 12AX7 tubes, GE NOS 12AT7 Drivers, and a Quad of cryo treated 6CA7 Electro Harmonix fat boy tubes. I'm hoping the warm the sound up a bit, get better imaging, broader frequency response.

Maybe next time I'll just attempt to build one from scratch, this way I use the resistors, caps, potentiometer, tube sockets, and tubes that I want.

Have any of you here tube rolled a Jolida and was satisfied with the results ?
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