Re: Focus on 475 scope


John
 

I've had (bad) noise on the traces of 453 series scopes when the EHT section cover was missing. So it may be worth checking the following on hte "bad" scope:

1. EHT screening all in place and all screws tight.
2. Ditto all earthing screws on pcb(s), and coax lead screens checked/ wiggled.
3. Wiggle transistors in their sockets to clean contacts.

John

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