UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Valve equivalents

Rileyman · 26th Nov 2020, 9:56 pm

This discussion has prompted me to mention the long-obsolete Philco-badged PenDD61 , one of which I found last week whilst clearing some space in my less-than-pretty shed . Sadly , a basic test showed a very low gm !
It was actually a Mazda AC/2PenDD , but with a 6.3v. heater to match the American valves in a U.K. built set. It was said to be a "concession" to the B.V.A.
Or has someone been pulling my leg ?

26th Nov 2020, 9:56 pm	#9
Rileyman Pentode Join Date: Sep 2018 Location: Maldon, Essex, UK. Posts: 228	Re: Valve equivalents - electrically This discussion has prompted me to mention the long-obsolete Philco-badged PenDD61 , one of which I found last week whilst clearing some space in my less-than-pretty shed . Sadly , a basic test showed a very low gm ! It was actually a Mazda AC/2PenDD , but with a 6.3v. heater to match the American valves in a U.K. built set. It was said to be a "concession" to the B.V.A. Or has someone been pulling my leg ?