--- In TekScopes@..., "Larry Christopher" <tektronix@...>
wrote:
Hi Andy,
I will try to help you with some of your questions:
Especially, can the PSU be bench-tested separately, or will there
be unexpected effects (underload)?
You will have an unexpected effect - it won't work. The AC for the
power supply, as well as its filament supply, comes from the 555.
You mean, the heater transformer in the 555 case feeds back to...
reading the PSU/Scope interface schematics already cost me a pack of
paracetamol... guess I'll need another pack... and an A3 printer... I
realize Tek also made some :)
Wonder whether it makes the PSU behave if I tell it "there is this
fine lass I know and like who wants a guitar amplifier..." :)
I am aware that I will probably need to take out and
reform all the lytics....
No reason to do this, these do not give a problem.
Are they different except in quality from Radio/TV lytics (which I'd
only kickstart into operation after 10 years rest with a pair of goggles)?
What happens if I operate the unit with only one vertical, or only
one
horizontal, or one only each...? Don't want to switch on and fry
everything in one session :)
Should be no problem, one beam will be weird but no damage.
Oh, and BAMA does not have any 21A/22A schematics... oh well
again...
These are in the 555 manual. Get the correct manual.
The 555 Manual on BAMA is for the pre-7000 serials.... no -A timebases...
Luckily I have reason to think the person who gave it to me has the
original manuals and just forgot to include them....
And finally... what ARE the differences between different serial
numbers of the PSU? It is often claimed they are not
interchangeable... why?
Different serial number ranges used different AC wiring. Best to use
the PSU that came with the scope originally. Same with the 551.
Larry Christopher
www.theoscilloscopestore.com
Home of The Fridge!
