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Old 17th Oct 2020, 2:22 pm   #129
AdrianH
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Join Date: Mar 2020
Location: Blackburn with Darwen, Lancashire, UK.
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Default Re: My first foray into Old model TV repairs. Ferguson 991T.

I have the gear, not designed for TV but the IFR Com120B which has a sweep generator and analyser built in, but what should I expect, books tend to show it as a flat topped response between Vision carrier and a couple of MHz higher, with the lower sideband dropping off to nothing. And at what levels. Reading through the manual and service items suggests there are a few components to short out, or dampen if doing the static method.

Would you have a picture showing the response curve as that is what I would imaging it really to be a curve!

I quick look around the underside shows that the V1 anode resistor R8 has been off in the past as the wire no longer goes through the valve pins and is just soldered on top. So I would think at some point it has been 'tuned'.

Adrian
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