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HP 1741A oscilloscope - restoration project

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mayeri:
Hi TekFan,
Thanks for the quick response.  I thought it will not be too easy…
In storage mode I get a good picture in only one position:  PERSISTANCE min., BRIGHTNESS min.
The storage controls (PERSISTENCE and BRIGHTNESS) do absolutely no effect in CONV mode. That’s ok.

mayeri:
I show the rest:

mayeri:
PERSISTANCE

SeanB:
I have a dead storage scope mainframe somewhere....... Think the tube still works.

mayeri:
Does this phenomenon show an obviously defective tube?  I would trust in the TekFan’s experience firstly…
Tube replacement would be?  Then the spot remains…
Despite the spot it could be used in conventional mode.

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