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Modular Amps
Egnater / Randall Modular Amps
RM22 preamp tubes!
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<blockquote data-quote="JKMV12" data-source="post: 92326" data-attributes="member: 2019"><p>well the one closest to the input jack is the V1 (first two gain stages). </p><p></p><p>The larger tubes are the output/power tubes. </p><p></p><p>The preamp tube closest to the power tubes is the phase inverter. </p><p></p><p>the remaining tube (most likely in close proximity to the FX loops) is the loop buffer. </p><p></p><p>you should put a 5751 in the phase inverter spot. it cleaned up the noise in my amp. i haven't messed with the loop buffer (i don't use the loop). i have a Tungsol 12AX7 in the V1 but that is just me. Penta Labs has some good tubes. you can also try a 5751 in the V1 if you want similar tone to the 12AX7 with less gain. personally i would keep this one a 12AX7 and make the changes in the modules themselves. </p><p></p><p>hope this helps...</p></blockquote><p></p>
[QUOTE="JKMV12, post: 92326, member: 2019"] well the one closest to the input jack is the V1 (first two gain stages). The larger tubes are the output/power tubes. The preamp tube closest to the power tubes is the phase inverter. the remaining tube (most likely in close proximity to the FX loops) is the loop buffer. you should put a 5751 in the phase inverter spot. it cleaned up the noise in my amp. i haven't messed with the loop buffer (i don't use the loop). i have a Tungsol 12AX7 in the V1 but that is just me. Penta Labs has some good tubes. you can also try a 5751 in the V1 if you want similar tone to the 12AX7 with less gain. personally i would keep this one a 12AX7 and make the changes in the modules themselves. hope this helps... [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
RM22 preamp tubes!
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