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Thank you so much sir for what I feel that I should already know having some years under my belt in the repair and/or restoration of vintage radio and TV. Frankly, I never ran into this problem as I along with others I know that are in the electronics field don't use a scope that much if at all for troubleshooting.
Until I got college training I didn't even know how to use one, but I'm getting to a point in life where I just find waveforms as a troubleshooting method to be an interesting challenge. Back to the isoformer; there is really no excuse to be working on anything with a hot chassis without one. I have been real lucky I guess for a fair amount of years. Years ago I thought that a Variac was one, but thank goodness I know better now.
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"Face piles of trials with smiles, for it riles them to believe that you perceive the web they weave, and keep on thinking free"
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