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Station X · 23rd Aug 2019, 5:47 pm

The "bottom pin" as you call it of a VMS4B valve is pin 2 the control grid. A gram input could be connected here, but things don't look right to me. You have three pins all connected together, which is indicative of a common earth connection rather than an input.

It would help if you could post a picture showing the lettering on all the sockets.

23rd Aug 2019, 5:47 pm	#2
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: ALBA model 70 Radiogram nothing happening at gram socket. The "bottom pin" as you call it of a VMS4B valve is pin 2 the control grid. A gram input could be connected here, but things don't look right to me. You have three pins all connected together, which is indicative of a common earth connection rather than an input. It would help if you could post a picture showing the lettering on all the sockets. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.