Hi there I bought a pair of these converters from Thomann, Europe. I have this Matchless Lightning replica, but with 6V6 output, instead of EL84. Converting this amp to EL84 with the adapters just does not work. With the GZ34 rectifier, I get 'some' sound/signal, with 5R4 rectifier, I get NO signal/sound. PV with 5R4 rectifier is around 400, with the GZ34 it will be higher (did not measure).Any clues on why this does not work. Something to do with the fact the Lightning is not originaly a 6V6 amp, though it works perfectly with the 6V6. Try a 6L6 to EL84-converter...?Thxs for any thoughts..