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

Niechcial,Steve · 6th Oct 2017, 10:01 pm

I picked this set up on Ebay and it looks like it has been dry stored and is generally in excellent condition. The problem that is driving me mad is the width slowly creeping in on both sides. After an hour of operation it's in about an inch on both sides on both standards.
I've checked by substitution every component in the output stage except the LOPT and the scan coils (tried several new valves). Scoping the drive to the PL36 shows it remains stable throughout. No drop on the HT line
I'm beginning to think it must be the LOPT but I've never known one do this. The EHT is good with no blooming.
Anybody got any ideas?

6th Oct 2017, 10:01 pm	#1
Niechcial,Steve Hexode Join Date: Jan 2007 Location: Beckenham, London, UK. Posts: 373	KB VC1 width problem I picked this set up on Ebay and it looks like it has been dry stored and is generally in excellent condition. The problem that is driving me mad is the width slowly creeping in on both sides. After an hour of operation it's in about an inch on both sides on both standards. I've checked by substitution every component in the output stage except the LOPT and the scan coils (tried several new valves). Scoping the drive to the PL36 shows it remains stable throughout. No drop on the HT line I'm beginning to think it must be the LOPT but I've never known one do this. The EHT is good with no blooming. Anybody got any ideas?