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Audio and Video Talk
Vinyl
Give away - Philips 3541 portable valve tape recorder - 1963
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<blockquote data-quote="Steerpike" data-source="post: 71831" data-attributes="member: 807"><p>The caps I put in - which have been in storage (passed on to me) since around 1973 - measured in at 42uF - down from the marked 50uF, but only marginally beyond their -10% limit. </p><p>The reason I have to re-replace them is the DC leakage - I thought the 2mA leakage current at 350V (bench PSU test after 8h) would be OK, and drop even further as they continued to reform over time, but one is getting too warm for my liking.</p><p></p><p>I think I might add an adjustable "hum injection" gizmo, since I suspect almost all table-top radios hum to some degree - even with good caps.</p></blockquote><p></p>
[QUOTE="Steerpike, post: 71831, member: 807"] The caps I put in - which have been in storage (passed on to me) since around 1973 - measured in at 42uF - down from the marked 50uF, but only marginally beyond their -10% limit. The reason I have to re-replace them is the DC leakage - I thought the 2mA leakage current at 350V (bench PSU test after 8h) would be OK, and drop even further as they continued to reform over time, but one is getting too warm for my liking. I think I might add an adjustable "hum injection" gizmo, since I suspect almost all table-top radios hum to some degree - even with good caps. [/QUOTE]
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Audio and Video Talk
Vinyl
Give away - Philips 3541 portable valve tape recorder - 1963
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