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Modular Amps
Egnater / Randall Modular Amps
Blowing my power fuse
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<blockquote data-quote="bruce egnater" data-source="post: 94458" data-attributes="member: 265"><p>Possibly a shorted power tube even though a tube fuse didn't blow. Please verify:</p><p>1) Power one/Standby off = Fuse does not blow.</p><p>2) Switch standby to play = main power fuse blows?</p><p></p><p>If this is what happens, do this:</p><p>1) Remove all 4 power tubes.</p><p>2) Install new main fuse.</p><p>3) Turn power on. Fuse does not blow.</p><p>4) Switch standby to play. If the fuse blows, your amp is broken and will need to be repaired. If the fuse does not blow, this would indicate one of your power tubes is shorted.</p><p>5) Turn standby and power off. Put one power tube back in. Repeat the above steps. If the fuse blows, that is a bad power tube. Remove the bad tube and put in a different one. If the fuse does not blow, put in the next power tube and repeat the procedure. When you put the "bad" tube back in the fuse will blow.</p></blockquote><p></p>
[QUOTE="bruce egnater, post: 94458, member: 265"] Possibly a shorted power tube even though a tube fuse didn't blow. Please verify: 1) Power one/Standby off = Fuse does not blow. 2) Switch standby to play = main power fuse blows? If this is what happens, do this: 1) Remove all 4 power tubes. 2) Install new main fuse. 3) Turn power on. Fuse does not blow. 4) Switch standby to play. If the fuse blows, your amp is broken and will need to be repaired. If the fuse does not blow, this would indicate one of your power tubes is shorted. 5) Turn standby and power off. Put one power tube back in. Repeat the above steps. If the fuse blows, that is a bad power tube. Remove the bad tube and put in a different one. If the fuse does not blow, put in the next power tube and repeat the procedure. When you put the "bad" tube back in the fuse will blow. [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
Blowing my power fuse
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