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I removed and measured C176 and C186, they are good (reading 70p and 151p respectively).
I put back C177 and C183 but not C184; but there is no improvement - still only 46.5V p-p on the dummy load (Tx AM unmodulated). It reaches 52.5V p-p with VR13 (AM Carrier power) all the way up, corresponding to 6.9W.

ALC is basically disabled, I have turned VR12 all the way clockwise for max output in SSB. VLC is not supposed to be active in AM Tx.

Should I test the finals by disconnecting TR41 (or just unsoldering the base) then put it back and disconnect TR42?

(edit) incidentally - isn't it odd that the signals on the collectors of TR41 and TR42 are slightly different (picture in my first post)? they are wired together ...

[ATTACH=full]63667[/ATTACH]

[QUOTE="Summertown, post: 815776, member: 65077"] I removed and measured C176 and C186, they are good (reading 70p and 151p respectively). I put back C177 and C183 but not C184; but there is no improvement - still only 46.5V p-p on the dummy load (Tx AM unmodulated). It reaches 52.5V p-p with VR13 (AM Carrier power) all the way up, corresponding to 6.9W. ALC is basically disabled, I have turned VR12 all the way clockwise for max output in SSB. VLC is not supposed to be active in AM Tx. Should I test the finals by disconnecting TR41 (or just unsoldering the base) then put it back and disconnect TR42? (edit) incidentally - isn't it odd that the signals on the collectors of TR41 and TR42 are slightly different (picture in my first post)? they are wired together ... [ATTACH type="full" alt="finals B.jpg"]63667[/ATTACH] [/QUOTE]

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