Replacement Valve Kit for Marshall SV20H (2 x JJ ECC83 1 x JJ Balanced ECC83 ...
£142.42
2 x Selected Premium Grade JJ ECC83 preamp valves. 1 x Selected Premium Grade JJ Balanced ECC83 for the phase inverter in position V3 (this is the one furthest from the input jack and closest to the power valves).