AidanLunn wrote:I also noticed that R102 I had accidentally put in a 220K as opposed to 820K. In the early stages of this restoration, the only service literature I had to go off before I obtained the ERT sheet was the RTVS 1959-60 book. In this it has the original QV30 but it acknowledges the QV30/1 in a footnote as having "a number of minor variations". In fact, this is somewhat misleading as most of the frame stage is different!! I only ordered the ERT sheet once it became clear that the circuit in the RTVS book had more than just "minor" differences and resembled very little the frame circuit of the set I had in front of me. So that is another possibility I will need to look up, any components changed to the wrong values because of Newnes' reluctance to include a separate entry for the QV30/1 in that year's book!
Question: Why do you not change 'like for like'? Surely if you find an 820K (which is obviously original) in the set and the circuit you have (which is known to be different) says 220K, you change it for an 820K anyway! Suppose you didn't have a circuit at all and you were tracing through the frame stage and found an 820K had gone high. With no other reference you would replace it with another 820K wouldn't you? Or would you say....'Haven't got one of those so I'll stick a 220K in as that's the highest I've got'......no I don't think you would.....or would you?
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