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Read the Post in new Window Read the Post in Threaded view  Post #5: Confirming hum by keithiopian on 2020-06-11 
Browse the content of the threads in new Window  Thread: 834p modding..."humming" along a bit too much... in Analog Playback  4 Replies 
tried with everything back reassembled (enclosed w/ copper shielding and such)...still a hum. Both MC and MM, slightly less on both when put in a lifted-ground japanese plug. Possibly relevant, there also seems to be a secondary noise, more of an osc...

Read the Post in new Window Read the Post in Threaded view  Post #4: Pics = 1000 by keithiopian on 2020-06-11 
Browse the content of the threads in new Window  Thread: 834p modding..."humming" along a bit too much... in Analog Playback  4 Replies 
reference on current statehttp://tempuri.org/tempuri.htmlScope on the power supply out seems pretty steady......

Read the Post in new Window Read the Post in Threaded view  Post #3: Tried your method by keithiopian on 2020-06-11 
Browse the content of the threads in new Window  Thread: 834p modding..."humming" along a bit too much... in Analog Playback  4 Replies 
totally disconnected, even on different power plug. Will try with everything screwed back together in final box form to double check any EMI (and when it's not 1am). thanks for the advice. oh and it does hum with either mm or mc, just obviously harde...

Read the Post in new Window Read the Post in Threaded view  Post #1: 834p modding..."humming" along a bit too much... by keithiopian on 2020-06-11 
Browse the content of the threads in new Window  Thread: 834p modding..."humming" along a bit too much... in Analog Playback  4 Replies 
So I decided to try some of the mods mentioned to my semi-recent 834p w/ MC step-ups. It all started with C1 and C7...but then i got into RIAA, upgraded diodes and filter caps. Well, everything should be just stellar on paper but...now I have a hum t...
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