Where does the negative wire go from pin to driver board

Dynaco-Doctor Forum

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I need help connecting my right/left rca inputs. I have bad feedback because I cannot find the ground to the driver board. I deleted my mono/stereo switch also. I connected the positive/right to eyelet 17 on driver board. Positive/left to eyelet 7. Also the 470k resistor to the negative/positive on the rca input jacks. I have the original dynaco driver board. I cannot find the ground for the rca jacks. The only ground I am using on the board is eyelet 9 grounded to the bolt on my old quad cap setup(I purchased the curcio one). I looked at different diagrams and they state connect the grounds for your rca's to the eyelets over the 9 where the two 10k resistors lie, the end where it is not connected. My other question is concerning the speaker right/left opt leads. I know the positives are connected to eyelet 12, 13 on driver board, and both negatives to eyelet 9 on driver board to 16ohm and black on the opt leads. I clipped and heatshrunk the 4ohm because my speakers are 8 ohm. Would this cause a problem. I am losing faith and worked on the amp for over 3 months. Members on the board said I have a ground loop problem because of my bad feedback noise. Anyone out there that can help. I am willing to ship my st70 out to someone that can fix my problem.thanks

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Topic - Where does the negative wire go from pin to driver board - Carl B. 19:53:14 06/10/06 (7)

Re: Where does the negative wire go from pin to driver board - Russ57 20:24:11 06/10/06 (6)

Re: Where does the negative wire go from pin to driver board - Carl B. 08:51:01 06/11/06 (0)

Re: Where does the negative wire go from pin to driver board - Carl B. 04:58:31 06/11/06 (1)

That ceramic cap - Russ57 07:00:54 06/11/06 (0)

10 and 8 go to the preamp sockets via the 10 ohm resistors, don't they? - Marshall W 21:23:44 06/10/06 (2)

Re: 10 and 8 go to the preamp sockets via the 10 ohm resistors, don't they? - Carl B. 05:31:38 06/11/06 (1)

Re: 10 and 8 go to the preamp sockets via the 10 ohm resistors, don't they? - Russ57 07:08:40 06/11/06 (0)

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