Bias guitar amp without probe
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Since 2006 we have offered a single octal bias probe for use with a Multimeter. We will continue to offer these because in conjunction with a Multimeter this is the most cost effective tool for measuring true plate current allowing you to accurately bias your amp. These probes are $25.00 and available in our online store and can be used with 6V6 - E元4 - E元4II - E34L - KT77 - 6CA7 - 6L6 - 6L6GC - KT66 - 6550 and KT88 tubes. I didnt remember this from playing around with the same amp model (JCM 800) in Amp 2, so I removed the FX plugin from my insert and replaced it with the Amp plugin. We try to keep a carton or two of our $10.00 "Cheap Multimeters" on hand and if you see them in the online store they are in stock. The noise was registering about 20 db below the guitar/amp levels on the master fader meter, which is just insane. If you have lost your instruction sheet for one of these probes you can find a copy HERE. No switches, no batteries, no knobs! And only $99.00 See it in action in our latest "How To" Bias Video! The ET “Pro One” Octal Bias Probe. In 2012 we introduced the ET “Pro One” Bias Probe. It is unique in the fact that it shows you both the plate current and plate voltage simultaneously and it is completely self- contained with no switches or batteries. It is phantom powered using an extremely small amount of the AC voltage and current produced by the amplifier it is being used to test. The amount of voltage and current used is in fact so small that you could literally power up one hundred of our ET “Pro One” Bias Probes with the average guitar amp without any noticeable drain on the transformer. Simply remove one of your power tubes, install the probe, which indexes exactly like the tube does with the timing key on the guide pin, then install the tube in the top of the probe. Make sure you have a speaker load connected to the amp and then power the amp up.
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