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Choke mod 149.00

​Output transformer upgrade 195.00

​Choke and output transformer upgrade 295.00

​Convert preamp to 102 or 183 style circuit 299.00

​Convert preamp to 102 or 183 style circuit and choke mod 399.99

​Convert to 102 or 183 style circuit, choke and output mod 499.00

4-6v6 40w $1599.00

1/2 power switch $55.00
12w 15w 20w 30w 50w all available
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