nashou
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Post by nashou on Nov 14, 2016 20:07:34 GMT -5
-6.96 and -13.7 forget the previous numbers I forgot to plug amp back in !!! -6.96 goes to TR104 This is with TR108,TR104,TR106 removed? Yes both channels have the same parts removed, Nashou |
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Post by mastertech on Nov 14, 2016 20:14:48 GMT -5
Looks like they are pretty close to even. Now more voltages to try to narrow this down. Leave all parts removed for now.
Gate of tr107 on 103 side_________
Gate of tr107 on 105 side_________
collector of 103______
collector of 105______
Gate of tr108 on 104 side______
Gate of tr108 on 106 side______
collector of 104_____
collector of 106_____
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nashou
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Post by nashou on Nov 14, 2016 20:20:30 GMT -5
Ok I have to go to my Restaurant I'll be back in an hour or so. Take a break  lol Nashou |
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Post by mastertech on Nov 14, 2016 20:22:56 GMT -5
K
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nashou
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Post by nashou on Nov 14, 2016 21:17:27 GMT -5
Looks like they are pretty close to even. Now more voltages to try to narrow this down. Leave all parts removed for now. Gate of tr107 on 103 side_________ Gate of tr107 on 105 side_________ collector of 103______ collector of 105______ Gate of tr108 on 104 side______ Gate of tr108 on 106 side______ collector of 104_____ collector of 106_____ Do you mean the gate that goes to that TR or the gate relative to the graphics on the schematic? Because the gates do not go to any TR? |
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Post by mastertech on Nov 14, 2016 21:48:03 GMT -5
relative to the graphics on the schematic
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nashou
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Post by nashou on Nov 14, 2016 21:55:03 GMT -5
Looks like they are pretty close to even. Now more voltages to try to narrow this down. Leave all parts removed for now. Gate of tr107 on 103 side_________ 5.4 mVGate of tr107 on 105 side_________ -2.7Vcollector of 103______ 24.87collector of 105______ 24.76Gate of tr108 on 104 side______ 7.3mVGate of tr108 on 106 side______ -1.7V but it drops steadily stoped measuring at -1.5collector of 104_____ 25.08collector of 106_____ 25There they are. |
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Post by mastertech on Nov 14, 2016 22:04:59 GMT -5
Interesting that you are getting 5.4mv and 7.3mv on those 2 since they are tied to ground. Must be your meter. Not to worry about though.
Do you remember the locations of the parts you have removed?
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nashou
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Post by nashou on Nov 14, 2016 22:13:21 GMT -5
Not eat but the relevant channel. yes. But remember I don't have another 2sk146 And I don't want to swap it into TR107 I ordered some of the singles you posted earlier. Nashou |
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Post by mastertech on Nov 14, 2016 22:20:51 GMT -5
That is ok for now. I just want you to put in the tr103,105,104,106. Swap channels though and then do voltage test again. BEC of all 4 and the 2 gate pads for 107 and 108 on the power side. This time, before you plug it in to test I want you to rotate the "Phono Selector" knob back and forth a bunch of times to try cleaning the contacts and then leave it on the 47K setting and then test voltages.
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nashou
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Post by nashou on Nov 14, 2016 22:34:21 GMT -5
Which is the power side? The side that goes to C111 and C112?
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Post by mastertech on Nov 14, 2016 22:36:02 GMT -5
yes
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nashou
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Post by nashou on Nov 14, 2016 22:55:28 GMT -5
Ok
TR103
E=0 , C=24.64, B=-7.04
TR105
E=0, C=24.80, B=-7.04
TR104
E=0, C=25.12, B=-7.02
TR105
E=0, C=24.9, B=-7.03
TR107
G=-2.081
TR108
G=-1.452
They seem close
Nashou
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Post by mastertech on Nov 14, 2016 23:00:51 GMT -5
Yes, everything seems ok. Guess now we have to wait for those other FET's to come. How many did you order? And which ones, the 363's?
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nashou
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Post by nashou on Nov 14, 2016 23:03:53 GMT -5
Yes, everything seems ok. Guess now we have to wait for those other FET's to come. How many did you order? And which ones, the 363's? Yes from MOJOTONE I ordered 8 . How do I go about matching them? Not sure if they are as low noise as the originals. So why do the voltages seem to match up now? Seems strange that just swiping them from channel to channel would do that? Athanasios |
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lol
