Hello. I'm fairly new to AK, but a while ago I bought a Sony TA-F7 VFET amplifier, which was restored by the previous owner (including a recap). I'm not a technical expert, but I gather that replacement VFETs are very difficult to find, so if one blows then it's probably curtains for the amp. From my reading on AK, this is less likely to happen if the other components in the amp are kept in good condition. At the moment the amp sounds great. However, for future reference does anyone know an expert technician in the UK who would be able to work on this amp? I would like to keep it serviced periodically. If the technician is based in the South East (I'm in Colchester) that would be even better, as it would avoid having to mail the amp.