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10th May 2010, 07:20 AM
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#72 |
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diyAudio Member
Join Date: Oct 2008
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Hi Anatech. I was going to start a new thread before seeing this one. I had an Sa5 in perfect woring order till I got my mitts inside it. I was alwways bothered by the volume control, which always tracked poorly, and ordered a new Audio Note 100K to replace it. I also thought it would be a good idea to bypass the gain pots. I donīt believe that the volume control caused the problem, but to remove the gaim controls, I simply connected the input lead to output. After turning it on, it worked fine at a low volume but when turned up a bit, the right channel began to cut out off and on before going altogether and the left would "bottom out" before reaching half volume. I rewired the gain controls, double checked the wiring for the volume control and installed a set of used 6922īs in the line stage to try again. The right channel is still out. I have no schematic or service manual for this and am at a loss to find the problem, save going over it part by part. Just so you should know, Iīm in southern Spain where there is little to no place I could take it, and at the moment, I donīt have a tube tester.
Don |
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13th June 2010, 10:43 PM
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#73 |
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diyAudio Member
Join Date: Oct 2009
Location: Winnipeg, Manitoba
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Chris, Alan (et el)... just letting everyone know everything is working great. I have replaced the photoflash caps and monster size resistors.
Alan, I have sent you a PM regarding the vertical circuit board. While poking around I also noticed my umbilical power cord wires were looking tattered. Especially the ones where the design called for two wires going into holes sized only for one. I re-dressed all the wiring and have attached some before and after links. Where two wires had to fit into one small hole (two instances), I bared and crimped the wires together, leaving about 1/4" sticking out. I then soldered, and filed this portion to fit. Everything was neatly heat shrinked. On one set I used clear shrink. You can see the crimp. You can also see in the pics the original wires that had strands cut from each lead in order to fit the small hole. I could swear I hear a larger sound stage and overall power after I re-dressed all of these wires. Though by the time I finished this, it was very late in the evening... and everything sounds better then...  Ed http://dl.dropbox.com/u/5444992/IMG_0034.JPG http://dl.dropbox.com/u/5444992/IMG_0038.JPG http://dl.dropbox.com/u/5444992/IMG_0048.JPG http://dl.dropbox.com/u/5444992/IMG_0055.JPG http://dl.dropbox.com/u/5444992/IMG_0060.JPG |
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