Quote:
Originally posted by dsk
Now it sounds like crap (it may have before, I really didn't listen to it). It sounds like a speaker is blown, although I don't think that is the case, I'm just trying to describe the distorted sound. Could it be a tube?
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The first thing I'd check would be the electrolytic filter caps, if you're hearing hum with the sound. However, since you didn't go into specifics about how your C845 "sounds like crap", I can't say a whole lot more. One of the speakers could have a jammed voice coil, but if it were open you wouldn't hear anything at all from it. I would also make sure the speaker cones aren't torn or otherwise damaged; this can and often does cause distorted sound in radios (and TV sets as well).
The audio output tube could be gassy or shorted; if the latter, however, your set wouldn't work at all, since a shorted tube in a series filament string will remove filament voltage from all tubes following it and will cause every tube before the shorted one to glow brighter than the rest (as they are now being forced to operate with more voltage than that for which they were designed), and one of them will burn out if the set isn't shut off in a hurry.