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Audio and Video Talk
The Vintage Audio Section
Supersonic One-Eleven
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<blockquote data-quote="Family_Dog" data-source="post: 853579" data-attributes="member: 82"><p>Supersonic were originally made in Southern Rhodeisa and were known for excellent consumer products at the time.</p><p></p><p>Motor-boating and hum would be caused by a kaput filter cap - that big green one standing vertically in the power supply section. Cannot see for sure, but it seems the PSU is fitted with a selenium rectifier (might be wrong here), that being so, change it as well with a suitably rated bridge rectifier (or loose diodes, 4 x 1N4001 should do it).</p><p></p><p>If the RF section uses germanium transistors (AF117 etc), they have probably also have seen better days. </p><p></p><p>It is worthy of restoration!</p><p></p><p></p><p>-F_D</p></blockquote><p></p>
[QUOTE="Family_Dog, post: 853579, member: 82"] Supersonic were originally made in Southern Rhodeisa and were known for excellent consumer products at the time. Motor-boating and hum would be caused by a kaput filter cap - that big green one standing vertically in the power supply section. Cannot see for sure, but it seems the PSU is fitted with a selenium rectifier (might be wrong here), that being so, change it as well with a suitably rated bridge rectifier (or loose diodes, 4 x 1N4001 should do it). If the RF section uses germanium transistors (AF117 etc), they have probably also have seen better days. It is worthy of restoration! -F_D [/QUOTE]
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Audio and Video Talk
The Vintage Audio Section
Supersonic One-Eleven
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