"Dean" bravely wrote to "All" (15 Dec 04 04:45:23)
--- on the heady topic of "Static on amplifier, not volume related"

Along with the advice to check the dry capacitors, one should also
check the damping network across the speaker. This typically consists
of a 10 ohm resistor in series with about 0.01uF or 0.1uF; the
resistor may be open.


De From: (Dean)

De Hi,

De I have done a quick search but couldn't find a problem that was very
De similar to mine in previous posts, so here goes.....

De I have just bought a 30 year old amp (Rogers Ravensbourne Stereo) and
De it's got a bit of a problem. There is a continuous static noise coming
De from the speakers (one channel more than the other). You can also see
De the cones in the speakers moving in and out slowly along with the
De noise almost like applying a DC voltage.

De The amp works OK otherwise, the noise seems to be from the output
De stage as volume, bass, treble, input selection etc make no difference.
De I have whipped the top off and can't see any obviously fried
De components. There are some thermistors on the power supply that look
De pretty tatty but I shouldn't think these would introduce a static type
De noise.

De Thanks

De Dean


.... A stereo system is the altar to the god of music.