Tube Rolling newbie question
riglehart
Posts: 276
My Jolida JD202 integrated has 8 tubes.
4 - EL34
2 - 12ax7
2 - 12at7
It has 4 bias adjusting points.
Q1: Which tubes does this bias adjust?
Q2: Every time you swap tubes, you have to check/adjust the bias again, right?
Q3: On the tubes without adjustments, can you swap those and not worry about adjusting anything?
Q4: I can handle burning out a tube or two learning this game, but frying something internally would really be a drag. Is that something to even worry about?
Q5: If I'm going to seriously make tube amps a hobby, do I need a tube tester? Or is there a "poor man's" way to test tubes?
I don't have a manual. Anyone have a manual for this? I'd pay for a copy.
4 - EL34
2 - 12ax7
2 - 12at7
It has 4 bias adjusting points.
Q1: Which tubes does this bias adjust?
Q2: Every time you swap tubes, you have to check/adjust the bias again, right?
Q3: On the tubes without adjustments, can you swap those and not worry about adjusting anything?
Q4: I can handle burning out a tube or two learning this game, but frying something internally would really be a drag. Is that something to even worry about?
Q5: If I'm going to seriously make tube amps a hobby, do I need a tube tester? Or is there a "poor man's" way to test tubes?
I don't have a manual. Anyone have a manual for this? I'd pay for a copy.
Jolida Tube
Polk 11T, 7, 5, 5jr, 4
Standard equip not worth bragging about.
Polk 11T, 7, 5, 5jr, 4
Standard equip not worth bragging about.
Post edited by riglehart on
Comments
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1. The four EL34 power tubes.
2. If you change the power tubes and it's a good idea to check bias every now and then.
3. Yes
4. Do-do happens.
5. Unless you're going to get heavy into tubes and selling lots of them, not really. Buying from reputable sellers is usually worry free and the good ones will make things right should there be an issue within a reasonable time frame.
Jolida will sell you one if all else fails.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
You can contact them directly, they should be able to hook you up w/ a manual. here is their numbers:
Tel: (301) 953-2014
Fax: (301) 498-0554
