THE GREAT MULLARD MAGIC BLOG
MULLARD BATTERY VALVES
Even though the National Grid came on stream in 1947, the public electricity supply in the UK was a real hotch - potch of AC/DC offered at differing voltages -...
MULLARD BATTERY VALVES
Even though the National Grid came on stream in 1947, the public electricity supply in the UK was a real hotch - potch of AC/DC offered at differing voltages -...