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

Chindit · 13th Feb 2019, 2:56 pm

That gold valve is definitely one of the 2 volt filament types that were used in so many WW2 manpack sets. As I mentioned, my HAC set used an AR8 with grey metallising. This looks like an ARP12 pentode, as many of these were made with gold metallising and straight-sided envelopes. I don't think I've ever seen a gold, straight-sided AR8 - all mine are either grey or green.
I've still got the original valve and all the bits (including the octal-based Denco coil) - just need a new chassis! I must have 're-purposed' the original.
Certainly back in the 70s, noise levels were lower and, operated from batteries, these valves perform very well with a wonderfully silent background.
You'll find scans of various HT batteries on the net; they can be printed out, glued to a cardboard backing and used to make a very convincing reproduction HT battery that would be perfect for your set.

13th Feb 2019, 2:56 pm	#12
Chindit Tetrode Join Date: Feb 2011 Location: Bishop Auckland, County Durham, UK. Posts: 97	Re: HAC Regen receiver PSU That gold valve is definitely one of the 2 volt filament types that were used in so many WW2 manpack sets. As I mentioned, my HAC set used an AR8 with grey metallising. This looks like an ARP12 pentode, as many of these were made with gold metallising and straight-sided envelopes. I don't think I've ever seen a gold, straight-sided AR8 - all mine are either grey or green. I've still got the original valve and all the bits (including the octal-based Denco coil) - just need a new chassis! I must have 're-purposed' the original. Certainly back in the 70s, noise levels were lower and, operated from batteries, these valves perform very well with a wonderfully silent background. You'll find scans of various HT batteries on the net; they can be printed out, glued to a cardboard backing and used to make a very convincing reproduction HT battery that would be perfect for your set.