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Old 10th Nov 2022, 10:25 am   #5
Philips210
Nonode
 
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,579
Default Re: Rather grim Thorn 1400 - Marconiphone 4649

Nick's set looks to be a good project and is coming along very well.

I also like the 1400 it's a good reliable chassis that was easy to work on. Thorn usually came up with a design that was easily serviceable and thus well accepted. Their jelly pot LOPTs were great and a shame other manufacturers didn't take a leaf out of Thorn's book.
The only potential safety issue with the 1400 was the position of the line output and efficiency diode valves when the chassis was swung open, a possible zap hazard! I've had one of two zaps from LOPT valve top caps but not from a 1400. ISTR one was a Pye hybrid and the other a Decca Bradford 10 series. They learned their lesson when the 1500 chassis was released with those valves on the opposite side of the chassis.

That Goldstar tube looks healthy. I actually put one in a Philips 300 where the original Mullard tube developed an internal short that couldn't be removed. The GS tube gave a lovely sharp picture and lasted many years.

Regards,
Symon
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