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

sunthaiboy · 13th Nov 2017, 2:10 pm

I have just acquired a very interesting and well built "Pantry Transmitter" from the deceased estate of an EX BBC Engineer (David Dunmall). It has taken some time to identify the function of all of the valves and the unusual tuning arrangements. It is a wonder to behold, especially when powered up. HT 1000V+, a pair of VR150's for screen stabilization of the twin 807's plus a VR105 for the driver stage. It must use a linear class of O/P stage as there is no high level modulation. It radiates at a touch under 4 MHz (Xtal derived), so into a dummy load only. Not quite sure of the function of the jam-jars, they don't improve the safety aspects!

David will be much missed, he was a real character and top notch engineer who has provided other lovely items that are on display at Criggion MW Radio Station.

13th Nov 2017, 2:10 pm	#1
sunthaiboy Retired Dormant Member Join Date: Jun 2011 Location: Crew Green, Powys, Wales, UK. Posts: 68	Monster Pantry Transmitter I have just acquired a very interesting and well built "Pantry Transmitter" from the deceased estate of an EX BBC Engineer (David Dunmall). It has taken some time to identify the function of all of the valves and the unusual tuning arrangements. It is a wonder to behold, especially when powered up. HT 1000V+, a pair of VR150's for screen stabilization of the twin 807's plus a VR105 for the driver stage. It must use a linear class of O/P stage as there is no high level modulation. It radiates at a touch under 4 MHz (Xtal derived), so into a dummy load only. Not quite sure of the function of the jam-jars, they don't improve the safety aspects! David will be much missed, he was a real character and top notch engineer who has provided other lovely items that are on display at Criggion MW Radio Station. Attached Thumbnails