THE GREAT MULLARD MAGIC BLOG
WHAT'S INSIDE A VALVE? (iii)
Let's look at the PINCH today. The PINCH is something borrowed from incandescent lamp manufacture and is where lead-in wires pass through a valve envelope in a cleverly wedge shaped...
WHAT'S INSIDE A VALVE? (iii)
Let's look at the PINCH today. The PINCH is something borrowed from incandescent lamp manufacture and is where lead-in wires pass through a valve envelope in a cleverly wedge shaped...