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Audio and Video Talk
Valves / Vacuum Tubes
Please help identify rectifier
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<blockquote data-quote="Family_Dog" data-source="post: 829442" data-attributes="member: 82"><p>The 5Y3 is a bit light for supplying 4 x EL84 valves, so probably a 5U4 or GZ34.Check what amperage (if it is stated) is available for the 5v heater winding of the transformer. The GZ34 draws just under 2A, the 5U4 draws 3A.</p><p></p><p>Are you referring to the two 9-pin valves supplied with the amp? They should both be exactly the same, ie either ECC81 (both) or ECC83 (both). They would then use the two stages of the twin triode to drive a pair of EL84 output valves, presumably in Push-Pull.</p><p></p><p>Once the valves are in, run some voltage tests. If possible, trace out the schematic as well, would certainly be of assistance.</p><p></p><p></p><p>-F_D</p></blockquote><p></p>
[QUOTE="Family_Dog, post: 829442, member: 82"] The 5Y3 is a bit light for supplying 4 x EL84 valves, so probably a 5U4 or GZ34.Check what amperage (if it is stated) is available for the 5v heater winding of the transformer. The GZ34 draws just under 2A, the 5U4 draws 3A. Are you referring to the two 9-pin valves supplied with the amp? They should both be exactly the same, ie either ECC81 (both) or ECC83 (both). They would then use the two stages of the twin triode to drive a pair of EL84 output valves, presumably in Push-Pull. Once the valves are in, run some voltage tests. If possible, trace out the schematic as well, would certainly be of assistance. -F_D [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Please help identify rectifier
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