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Old 03-31-2013, 06:17 AM   #1
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Replacing Tubes

I have a jet city JCA22h and I plan to replace the tubes. I know that I can plug and play, but my question is. Do I need to buy / replace all the tubes at once? Or can I buy 3 12ax7s for now and get two more down the road as well as the two power tubes. Thanks.
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Old 03-31-2013, 06:20 AM   #2
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You can change the preamp tubes without matching all you want. 12AX7s are preamp tubes if you don't know. The power tubes must be a matched set and changed at the same time. The EL84s would be the power tubes.
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Old 03-31-2013, 06:21 AM   #3
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You can replace the pre-amp tubes by themselves. When you're buying power amp tubes, get a matched pair and replace them at the same time.

Grab some JJ's. You should have spares of everything anyway.
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Old 03-31-2013, 06:28 AM   #4
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Yeah I figured the power tubes would have to match. I'm glad to hear that I can mix the preamp tubes though since there's 5 of them. Pricey to replace.
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Old 03-31-2013, 06:33 AM   #5
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JJ's are only $10 each.

I recommend one of these for V1. They're low noise have a bit more sparkle in the top end.
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Old 03-31-2013, 06:44 AM   #6
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How are they in comparison to tung-sols? Those are what I was looking at.
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Old 03-31-2013, 08:20 AM   #7
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Tung sols are brighter, JJs are slightly darker/low mid
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