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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: ARC VT-50 + AI Modulus 3a = WEAK BASS...help! posted by tube lubba on September 16, 2004 at 12:58:43:
I tried to call ARC but they are closed on Fridays right now. The input and driver tubes may need to be tweaked. There are three tiny trim pots on the back of the circuit board under the side panel of your amp. It is my understanding that if these are not correct the amp will not sound or opperate right. If you didn't get the 6922's from ARC this might be the issue. I am going to get them to send me the procedure when I can get ahold of them. You seems that you just can't slap any old 6922 into the amp and make it work. It looks a bit tricky as the stuff is very small and you need to know what you are doing so you don't fry yourself. I will look into it a bit more.Take a look at this link. It is about the Vt 100 mkII which is the same as your amp with half as many tubes. I got this from a post by another AA contributor Abe Collins. (Click on the pic to go to the next page.)
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Follow Ups
- Jay, the input and driver tubes may need to be adjusted - Keith Lockwood 08:45:22 09/17/04 (8)
- Keith, you were right! - tube lubba 08:31:55 09/18/04 (4)
- Most people don't know - Keith Lockwood 08:52:47 09/18/04 (3)
- Re: Most people don't know - tube lubba 10:19:36 09/18/04 (2)
- I still have Sovteks' in there - Keith Lockwood 15:50:14 09/18/04 (1)
- Re: I still have Sovteks' in there - tube lubba 21:50:19 09/18/04 (0)
- Re: Jay, the input and driver tubes may need to be adjusted - tube lubba 11:09:26 09/17/04 (2)
- Inverting is no more an issue than with the VT 60 - Keith Lockwood 11:44:47 09/17/04 (1)
- I was using the VT-60 with an LS-7....sorry for the confusion..n/t - tube lubba 13:18:54 09/17/04 (0)
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