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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: Re: Ampeg v4 posted by toons on November 5, 2002 at 16:14:20:
T,Try to have those power tubes tested, before using them in the amp. You don't want to put in shorted tube into this amp, for sure. Mucho damage is possible.
If tube are cool---plug them in and ramp up the amp with a Variac. Check for bad things, like sparks and the smell of frying electronics. CHECK that electrolytic multi-section can. If it seems hot or you are getting a lot of buzzing noise, even at low Variac settings---turn off the Variac and contemplate replacing that can. If the old one blows up on you---you will have a big time mess on your hands.
Be sure to have a spare speaker cab attached to the OPT. Check and adjust the output tube bias. For this amp it must be steady, or you risk frying other components.
If all seems good after a nice slow ramp-up (say, over 15-30 min)---plug in your axe and hit a few chords. If you get all kinds of strange overtones or static----could be dried out 'lytic caps---most common problem of these old amps, which have been sitting for awhile.
Good luck, this amp is really close to the SVT amps which Ampeg made. So, all the good and bad of the SVT can be applied to the V4.
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Follow Ups
- Re: Ampeg v4 - steven oda 10:48:36 11/06/02 (0)
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