- blavod
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Custom Cool utilisateur
Citation:
Q6: I want to see if my amp powers up, but I don't have a speaker cabinet. Can I just turn on the amp and see if the tubes light up?A: You can do this, but only very briefly, a few seconds at most. According to Mark Huss, " As long as nothing is plugged into the output jacks, you should be fine. Most tube amps automatically short the output jacks if nothing is plugged in. It's much worse (and potentially fatal for the OT) if you have a speaker cable plugged into the head but not the speaker. Unlike solid state amps, tube amps are much happier with their output shorted then open-circuited."
So, always, always, ALWAYS turn on a tube amp ONLY when there is a speaker cable connected between the amp and a cabinet! Nothing will trash an output transformer like NOT doing this. Be nice to your Partridges and they'll be nice to you.
du FAQ de Soundcity.
Mais je pense que si tu gardes le standby enclenché, ca devrait marcher non?
Citation:
what happens with very high impedance loads is that they naturally want to run at high voltages, and will therefore reflect that impedance back through the transformer to the tubes. in the case of a 1000ohm load, the primary side of the transformer would see a very high voltage (roughly 125x the normal voltage), which would very likely be enough to break down the insulation in the windings of the transformer and fry it. conversely, if you were to connect a 1-ohm load, the primary side would see 1/8 the normal voltage, and current through the tubes and transformer would actually drop, due to ohm's law. this is the reason why a lot of amp manufacturers put speaker jacks in their amps which have a shorting contact to make sure the amp doesn't see an infinite-impedance load (no load). Citation:
e) Speaker OutputsIf you put the amp in play make sure you have a load or speaker cabinet hooked up, otherwise you could damage the output transformer and the power tubes. Let's begin by hooking up a speaker to the new Speaker 1 "Use First" jack on the back panel of the Shiva. Be sure to set the impedance switch correctly, use the 16, 8, or 4 ohm setting to match your cabinet. If you're not sure what impedance your cab is, open the back of the cabinet and call your dealer. There are many ways to wire a speaker cabinet and you need to know what yours is rated at...
http://www.bogneramplification(...)l.htm
Hell was full ....... SO I CAME BACK!!!
Cort MattMurphy+micros benedetti et crel...tete sovtek mig 50+ Trace Elliot SpeedTwin 100, stack 4*12 Peavey, Mesa Satellite 60.
Habite en espagne, aidez moi ils sont tous fous ici!!!
Cort MattMurphy+micros benedetti et crel...tete sovtek mig 50+ Trace Elliot SpeedTwin 100, stack 4*12 Peavey, Mesa Satellite 60.
Habite en espagne, aidez moi ils sont tous fous ici!!!
