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Tweaking the Soldano SLO Nakid Amp

373 views· 12 likes· 31:27· Mar 14, 2026

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Today the Tone Priest improves his newly constructed Simplified Soldano SLO Nakid clone by adding a thermistor, a varistor, changing out the 5881's for JJ 6V6S tubes and wiring the first gain stage in parallel. If this amp ain't broken we'll fix it until it is! https://patreon.com/TonePriest https://ko-fi.com/tonepriest https://tone-priest.creator-spring.com/ Thermistor - Mouser #: 527-CL80 MOV - Mouser #: 652-MOV-10D201KKTR Crenova 890Z Multimeter (Amazon affiliate link) - https://amzn.to/4s4bK5i = = = = = = = This and all Tone Priest videos are for edu-tainment purposes only. Vacuum tube amplifiers can have lethal voltages in excess of 700 volts. Capacitors can retain a deadly charge even when an amplifier is turned off and unplugged. Videos are not instructional nor do they advocate anyone doing any kind of repairs on their gear. Nobody should do electrical work on anything for any reason ever. Keep your hands and belongings inside the car at all times. tonepriest@gmail.com

About This Video

Welcome back to Tone Priest, where I take a perfectly good Simplified Soldano SLO “Nakid” clone and keep fixing it until it’s broken. In this video I’m doing some quality-of-life upgrades and a couple “let’s see what happens” experiments after discovering my plate voltage was screaming hot—around 460+ volts. That’s way past what a traditional 6V6 datasheet wants to see (350V max), so I talk through why tube suffixes matter (5881 WXT vs vintage-style 5881), and I try a set of JJ 6V6S tubes because they’re built more like a small 6L6 and are rated for higher voltage. Before I even swap tubes, I add two protection parts that I think are basically no-brainers: a CL80 NTC thermistor to gentlify the inrush current (especially with diode rectification and big filter caps), and an MOV across hot/neutral on the switched side of the power switch to clamp nasty voltage spikes. Then I bias up the JJ 6V6S (about 464V on the plates, ~19.6mA, roughly 65%) and do some listening—less “balls” than the 5881s, but still ripping. And because I can’t leave well enough alone, I also wire the unused V1 triode in parallel (with separate grid stoppers, lowered to 47k) to drop noise and change the feel a bit. Nothing exploded, no sparks, no smoke—so I’m calling it a win.

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