Fisher 170 Distortion

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Fisher 170 Distortion

Mondial
Phorum Expert

Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY

#14

03-19-2015, 10:40 PM

Ok, my first guess is that Q15 is open. With .68 V across base to emitter, Q15 should be turned on and conducting current. There should therefore be current through R95 and a voltage drop across it, but since there is no current Q15 is suspect.

I would pull both Q15 and Q17 and check for open junctions CB and BE.

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Messages In This Thread

Fisher 170 Distortion - by Ron Ramirez - 07-19-2014, 10:50 PM

RE: Fisher 170 Distortion - by morzh - 07-19-2014, 11:14 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 07-19-2014, 11:18 PM

RE: Fisher 170 Distortion - by morzh - 07-19-2014, 11:20 PM

RE: Fisher 170 Distortion - by morzh - 07-19-2014, 11:26 PM

RE: Fisher 170 Distortion - by Mondial - 07-20-2014, 12:39 PM

RE: Fisher 170 Distortion - by morzh - 07-20-2014, 02:42 PM

RE: Fisher 170 Distortion - by codefox1 - 07-20-2014, 07:33 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 07-21-2014, 11:38 AM

RE: Fisher 170 Distortion - by morzh - 07-21-2014, 03:08 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-19-2015, 08:06 PM

RE: Fisher 170 Distortion - by Mondial - 03-19-2015, 08:46 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-19-2015, 09:37 PM

RE: Fisher 170 Distortion - by Mondial - 03-19-2015, 10:40 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-20-2015, 08:23 AM

RE: Fisher 170 Distortion - by Mondial - 03-20-2015, 08:48 AM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-20-2015, 08:56 AM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-20-2015, 11:26 AM

RE: Fisher 170 Distortion - by Mondial - 03-20-2015, 12:20 PM

RE: Fisher 170 Distortion - by morzh - 03-20-2015, 12:27 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-20-2015, 04:42 PM

RE: Fisher 170 Distortion - by morzh - 03-20-2015, 05:06 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-21-2015, 04:30 PM

RE: Fisher 170 Distortion - by morzh - 03-21-2015, 05:03 PM

RE: Fisher 170 Distortion - by Mondial - 03-21-2015, 07:30 PM

RE: Fisher 170 Distortion - by morzh - 03-21-2015, 09:15 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-21-2015, 10:31 PM

RE: Fisher 170 Distortion - by morzh - 03-21-2015, 10:51 PM

RE: Fisher 170 Distortion - by Mondial - 03-21-2015, 10:51 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-22-2015, 01:40 PM

RE: Fisher 170 Distortion - by morzh - 03-22-2015, 02:47 PM

RE: Fisher 170 Distortion - by PhilcoMike - 03-23-2015, 03:21 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 03-23-2015, 04:31 PM

RE: Fisher 170 Distortion - by Ron Ramirez - 01-23-2016, 06:08 PM

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