09-Aug-2019 12:37 AM
LOWTHERMAN62Posts: 62 |
Hello All, Having just completed a 303 revision I notice noise, At normal listening levels thnere is a hiss, white noise and a very low level hum. Increases with volume on both channels. Using a revised 33. When i substitute a 306 or 405-2 all is quiet. I have carried out only the dada revision. but all resistors meter ok. I have not touched any of the aging transistors . Can you point me where to look? I have installed multiturn trimmers and ril voltages are rock stadu 67/33.5 current is set at 10mV. |
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