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Old 11th Oct 2017, 8:31 pm   #27
crackle
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Join Date: Mar 2011
Location: Basildon, Essex, UK.
Posts: 4,100
Default Re: Hacker Radio:Motorboating - RP25

On the manufacturers service data the AM detector diode is CR1.
What Paul meant was, work forwards to the RF end of the radio circuit, by touching the signal generator on the collector of T4, then T3, then T2, then T1 noting what happens to the signal.
The point at which the signal disappears shows the transistor downstream towards the AF end is the faulty one.

Mike
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