Rheilly Phoull wrote in message
. au...
On 3/15/2012 8:16 PM, N_Cook wrote:
C13 100V 1uF at V1(A) cathode , of all things, is highly sensitive to
hot
air.
Monitoring the hum over the output load. Once force warmed and hum level
risen it is reluctant to go down again from natural cooling or from
freezer
spray - what process is going on with in it?
Now to replace by fudge fitting to in situ component leads or take the
whole
thing apart to replace properly?
Marshall saw fit to bodge 3 resistors by cutting off the originals and
flying replacement ones to the cut wires - so whats good for the goose
.....



Fudge it to verify the fault then do a proper number.

Rheilly P

Any ideas about the origin of the "heat ramping" effect?
Allowing the whole amp to cool for 1/4 hour obviously resets the effect