Tim Schwartz wrote in message
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On 2/18/2011 7:32 AM, N_Cook wrote:
Arfa wrote in message
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wrote in message
...
Arfa wrote in message
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Anyone by any chance got schematics for an Arcam Alpha 10 amplifier ?

TIA

Arfa


Not motorized function sw prob I hope.



No, it's not. But why do you ask, I wonder ? I did one of those on an
Alpha
9 just yesterday. It was no particular problem, as has been the case
with
a
few I've done in the past.

Arfa


Too much back-torque with all those multiway wafers - stripped plastic
gearbox cogs - indexing/alignment problems


Funny,

I've done DOZENS of those Alps switches. They must be taken apart and
cleaned, as spraying them does not seem to last, but I've never had a
stripped gear drive.

Regards,
Tim Schwartz
Bristol Electronics

P.S. These switches were used in the Arcam Delta 290, Xeta 1 and Alpha
9 integrated amps, along with the Creek 5350 and some Yamaha products.
I'd guess along with many others I don't know about.


There is a "weak link" , sprung loaded slotted axle support in the drive .
Intermittently disengages motor if excessive back torque/jammed , then will
mess up the tiny pinion if left in that state, clicking away to itself while
the owner sleeps through it. Does
not make as much noise as a Dyson slip clutch/ football rattle, you could
not sleep through that.