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B52 ST60 High Gain Option
Price: $221.50
B52 ST60 High Gain Option
Product Details
Want all the gain you can get? This is the High Gain Option Retube Kit for the B52 ST60. The preamp section uses one ECC81 to replace the 12AT7, a standard ECC83S in V5 and four handpicked High Gain ECC83S's with one balanced for the phase inverter in V6. The kit includes a GZ34 rectifier tube and the default power tubes are a matched pair of the JJ 6L6GC’s but you can configure this kit to use the JJ 5881’s by clicking on the "Customize" button! 
The ECC81 is located in V4 which is the fourth preamp tube away from the input jack. The Balanced High Gain ECC83S is located in V6 which is the closest preamp tube to the power tubes.


These are all adjustable bias amps and all you need to check and adjust the bias is a Multimeter if you're using the B52 method. A more accurate method is to use a bias probe and a Multimeter, or our all-in-one Eurotubes "Pro One" bias probe that reads both the plate current and the plate voltage simultaneously. These are available under the "Related Products" tab.


You can use our Generic bias video for reference which we did on a Marshall 800 and the procedure is the same.

The video below explains the difference between bias probe types






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