[alan green]

i recently hooked up a Fisher 800 amp and am getting this sporadic wind
like sound through the speakers. When it is wind free sounds great, but
when this sound start up it is pretty horrid....any suggestions. thanks in
advance

[Ian Iveson]

alan green wrote:

i recently hooked up a Fisher 800 amp and am getting this
sporadic wind
like sound through the speakers. When it is wind free
sounds great, but
when this sound start up it is pretty horrid....any
suggestions. thanks in
advance

Wind like weather, flatulence, or winch?

Ian

[Jon Yaeger]

in article , alan green at
wrote on 1/17/09 8:52 PM:

i recently hooked up a Fisher 800 amp and am getting this sporadic wind
like sound through the speakers. When it is wind free sounds great, but
when this sound start up it is pretty horrid....any suggestions. thanks in
advance

I would check for resistor noise, specifically anode resistors. Do you have
an oscilloscope to check stage-by-stage?

[Peter Wieck]

On Jan 17, 8:52*pm, (alan green) wrote:
i recently hooked up a Fisher 800 amp and am getting this sporadic wind
like sound through the speakers. *When it is wind free sounds great, *but
when this sound start up it is pretty horrid....any suggestions. thanks in
advance

That sound is often the case when coupling capacitors start to leak.
What is the state of the caps in the unit overall? As Jon suggests,
you could also have (an) open resistor(s). But check the caps first.

Whatever you do, don't run the thing until you can determine the
cause.

Do the output tube plates glow red when this happens?

Peter Wieck
Melrose Park, PA

[alan green]

thanks, however i am not technical or knowledgeable enough to do this.
is this worth searching out someone who is...any suggestions....thanks in
advance
alan green


In article
, Peter
Wieck wrote:

On Jan 17, 8:52=A0pm, (alan green) wrote:
i recently hooked up a Fisher 800 amp and am getting this sporadic wind
like sound through the speakers. =A0When it is wind free sounds great, =
=A0but
when this sound start up it is pretty horrid....any suggestions. thanks i=
n
advance

That sound is often the case when coupling capacitors start to leak.
What is the state of the caps in the unit overall? As Jon suggests,
you could also have (an) open resistor(s). But check the caps first.

Whatever you do, don't run the thing until you can determine the
cause.

Do the output tube plates glow red when this happens?

Peter Wieck
Melrose Park, PA

[Peter Wieck]

On Jan 23, 5:44*pm, (alan green) wrote:
thanks, *however i am not technical or knowledgeable enough to do this.
is this worth searching out someone who is...any suggestions....thanks in
advance

That's all in accordance with... so to write.

Yes, if you are into tubes. No, if cost is an object. If you choose to
pay the typical service tech something between $75 and $125/hour for
this, and it is a very-likely 2-3 hour job given the fact that they
must do a full diagnosis for all faults described or hidden, not
hardly. Some of us here could get it done in a fraction of that time
as we would not be worried about *potential* hidden faults - those
would be addressed as they became manifest - or not.

You have a desireable piece. Sells for good $$ on eBay and other
venues. Sells for a large fraction of those bucks *working* or not
depending on how artful the description might be. Do you want to own
it forever? In which case, I would suggest you learn its care-and-
feeding. Do you want to flog it in the near future? In that case, just
clean it up and let go at whatever it does right now.

Peter Wieck
Melrose Park, PA