According to block diagram, this old cap coupled Sansui gets it feedback unto TR802.
Question: Is the feedback network the C804/R806 connecting emitter to ground or does the feedback signal come through R808 to the collector of TR802, with "balancing" taking place through C803 Collector to base ?
Sorry - if this is obvious, I am just begining to learn, usually it is clear what the path is. Thanks!
Question: Is the feedback network the C804/R806 connecting emitter to ground or does the feedback signal come through R808 to the collector of TR802, with "balancing" taking place through C803 Collector to base ?
Sorry - if this is obvious, I am just begining to learn, usually it is clear what the path is. Thanks!
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The 3.3K R809 and the 100 ohm R805 make the voltage divider effectively adding feedback on the emitter side. C804 and R806 are for bias.
This is like a typical tube frontend where you inject negative feedback into the cathode of the first gain stage.
This is like a typical tube frontend where you inject negative feedback into the cathode of the first gain stage.
Thanks ! - Would it make sense then to add a film bypass to C805 as the feedback cap of the network. In other designs, I've had some improvement by bypassing with a film on select locations.
You want to replace the small electrolytics in the signal path at least. The small ones tend to really dry up and not work so well. C805 counts for that. Try bypassing after replacing with new decent caps.