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Gigmods Module Mods
question about power tube bios
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<blockquote data-quote="webrthomson" data-source="post: 140731" data-attributes="member: 3087"><p>Hey - it depends on the type of tube in question (actually the tubes watts dissipation rating) and the plate voltage of the amp - for the technical stuff see the eurotubes generic bias link here:</p><p></p><p><a href="http://www.eurotubes.com/eurotubes-Generic-How-To-Bias-Video-Marshall.htm" target="_blank">http://www.eurotubes.com/eurotubes-Generic-How-To-Bias-Video-Marshall.htm</a></p><p></p><p>Randall / egnaters suggested bias's are as follows (for the RM100/RM50/Mod100/Mod50):</p><p></p><p>6L6/5881 28mV to 35mV </p><p>EL34/6CA7 30mV to 38mV </p><p>E34Ls 35mV to 45mV </p><p>6550 35mV to 45mV</p><p>6V6 (JJ Only) 18mV to 22mV</p><p></p><p>(KT88's are bias'ed as 6550's)</p><p></p><p>From the RM100 manual here:</p><p></p><p><a href="http://geartunes.s3.amazonaws.com/gear/owners%20manual/RM100manual.pdf" target="_blank">http://geartunes.s3.amazonaws.com/gear/owners manual/RM100manual.pdf</a></p><p></p><p>And the Mod50 manual here:</p><p></p><p>http://www.bandslink.com/randall/Egnater%20MOD50%20Manual%20(3-07).pdf</p><p></p><p>Hope that helps - any questions let us know</p></blockquote><p></p>
[QUOTE="webrthomson, post: 140731, member: 3087"] Hey - it depends on the type of tube in question (actually the tubes watts dissipation rating) and the plate voltage of the amp - for the technical stuff see the eurotubes generic bias link here: [url]http://www.eurotubes.com/eurotubes-Generic-How-To-Bias-Video-Marshall.htm[/url] Randall / egnaters suggested bias's are as follows (for the RM100/RM50/Mod100/Mod50): 6L6/5881 28mV to 35mV EL34/6CA7 30mV to 38mV E34Ls 35mV to 45mV 6550 35mV to 45mV 6V6 (JJ Only) 18mV to 22mV (KT88's are bias'ed as 6550's) From the RM100 manual here: [url]http://geartunes.s3.amazonaws.com/gear/owners%20manual/RM100manual.pdf[/url] And the Mod50 manual here: http://www.bandslink.com/randall/Egnater%20MOD50%20Manual%20(3-07).pdf Hope that helps - any questions let us know [/QUOTE]
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Modular Amps
Gigmods Module Mods
question about power tube bios
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