"When I got the amp a couple of years ago, I had it fully serviced by my good friend Theo Argiriadis as it was producing some noise from its speaker outputs. Theo knows these amps inside out, and carefully checked out the amplifier, replacing some tired capacitors and resistors in the process. He also recommended fitting a standby switch to the rear of the amp to allow the amp to warm up before switching on the HT circuit and hence prolong the life of the valves (the new switch on the rear engages mains power, the original front switch turns on HT). After testing, he commented that this was one of the best Cadets he'd heard. We decided to leave the original Mullard output valves and Brimar preamp valves for the time being as they were still within spec and sounded good. Since this service, the amp has had occasional use and has performed faultlessly."