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Audio and Video Talk
Valves / Vacuum Tubes
testing tube voltage in circuit
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<blockquote data-quote="fredeb" data-source="post: 1026010" data-attributes="member: 13623"><p>I've restored a Pioneer SM83 before , replaced every single cap , electrolytic and others with modern versions of the same capacitance and higher voltage rating . The integrated amp , including the phonostage , sounds absolutely fantastic , unbelievably good in fact . </p><p></p><p>Effort will be well rewarded , and it is a big job .</p><p></p><p>You could check for DC after coupling caps , should have DC on one side (preceding anode) but none on the other side (next stage grid) , except in cases where negative grid voltage is applied to grid to bias output tubes . </p><p></p><p>It may be a good idea to post a large , clear schematic .</p></blockquote><p></p>
[QUOTE="fredeb, post: 1026010, member: 13623"] I've restored a Pioneer SM83 before , replaced every single cap , electrolytic and others with modern versions of the same capacitance and higher voltage rating . The integrated amp , including the phonostage , sounds absolutely fantastic , unbelievably good in fact . Effort will be well rewarded , and it is a big job . You could check for DC after coupling caps , should have DC on one side (preceding anode) but none on the other side (next stage grid) , except in cases where negative grid voltage is applied to grid to bias output tubes . It may be a good idea to post a large , clear schematic . [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
testing tube voltage in circuit
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