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Egnater / Randall Modular Amps
RM20B - Constantly Blowing External Fuse - PLEASE HELP!!
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<blockquote data-quote="schismatic" data-source="post: 117458" data-attributes="member: 931"><p>Many thanks for your reply Rob.</p><p></p><p>When checking the HT fuse (250mA) I checked that there was a resistance present across it. I believe it to be 100% in tact because it presented a resistance to me on my meter, and I have added some weight to this through a visual inspection which shows what appears to the eye as an in tact fuse. So for the purposes of this discussion now, we should assume the HT fuse to be operating correctly.</p><p></p><p>I have double-checked each time that my voltage selector is properly lined up for the correctly line voltage. For me in the UK, that is 240V. I'm absolutely sure it is correct.</p><p></p><p>I have tried removing all tubes and re-inserting them, but this did not solve my problem.</p><p></p><p>The only thing I haven't tried is adjusting the bias prior to powering on, however I was under the impression I couldn't bias without power on (my knowledge of the circuitry is not excellent!). </p><p></p><p>I however am expecting that the mains fuse will once again blow, which will lead me to your final suggestion - a pro needs to look at it.</p></blockquote><p></p>
[QUOTE="schismatic, post: 117458, member: 931"] Many thanks for your reply Rob. When checking the HT fuse (250mA) I checked that there was a resistance present across it. I believe it to be 100% in tact because it presented a resistance to me on my meter, and I have added some weight to this through a visual inspection which shows what appears to the eye as an in tact fuse. So for the purposes of this discussion now, we should assume the HT fuse to be operating correctly. I have double-checked each time that my voltage selector is properly lined up for the correctly line voltage. For me in the UK, that is 240V. I'm absolutely sure it is correct. I have tried removing all tubes and re-inserting them, but this did not solve my problem. The only thing I haven't tried is adjusting the bias prior to powering on, however I was under the impression I couldn't bias without power on (my knowledge of the circuitry is not excellent!). I however am expecting that the mains fuse will once again blow, which will lead me to your final suggestion - a pro needs to look at it. [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
RM20B - Constantly Blowing External Fuse - PLEASE HELP!!
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