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

Cobaltblue · 14th Jul 2018, 8:37 am

Don't know about military use bit its. QP21 or 240QP in Cossor coding and certainly Cossor used in at least two models the 485 and the 583 as a QPP output valve it gave higher power output for less average HT consumption at the expense of higher LT consumption. Very commonly used by many manufacturers of battery sets in the late 1930s

Cheers

Mike T

14th Jul 2018, 8:37 am	#2
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,879	Re: VR35 valve Don't know about military use bit its. QP21 or 240QP in Cossor coding and certainly Cossor used in at least two models the 485 and the 583 as a QPP output valve it gave higher power output for less average HT consumption at the expense of higher LT consumption. Very commonly used by many manufacturers of battery sets in the late 1930s Cheers Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk