Want a very smooth and rich tone with less grit? This is the Gold Pin Option Retube Kit for the Egnater Tourmaster Heads and Combo Amps. The preamp section uses eight Gold Pin ECC83S's with one balanced for the phase inverter in V8. The default power tubes are a matched quad of the JJ Electronic 6L6GC’s but you can configure this kit to use the JJ 5881's by clicking on the "Customize" button.
These are adjustable bias amps and all you need to check and adjust the bias is a Multimeter to use with the test points.