The bottom will power up okay with the top OFF as long as you have minimum load. I suspect that it will power up with all four plug ins. If not, add a 1 amp or so load to the 5v line.
Jerry Massengale
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-----Original Message-----
From: jerry massengale j_massengale@... [TekScopes] <TekScopes@...>
To: TekScopes <TekScopes@...>
Sent: Sun, Dec 7, 2014 9:24 am
Subject: Re: [TekScopes] 7704A -just a quickie
The bottom will power up okay with the top as long as you have minimum load. I suspect that it will power up with all four plug ins. If not, add a 1 amp or so load to the 5v line.
Jerry Massengale
-----Original Message-----
From: Keith Smith kahsmith@... [TekScopes] <TekScopes@...>
To: TekScopes <TekScopes@...>
Sent: Sat, Dec 6, 2014 11:09 am
Subject: [TekScopes] 7704A -just a quickie
Hi,
I'm just getting started on a 7704A that has a few problems. There will
probably be a few more questions to follow but first off I need to know if
I can safely power it up with the top half disconnected and removed. I
don't want to cook anything!
The plugins (7A26, 7A16A, 7B85 & 7B53A) all appear to work fine in my 7603.
In the 7740A I'm not getting good vertical signal throughput, the vertical
position controls do nothing and the calibrator signals are badly
attenuated. PS looks good for voltage (will check ripple tonight). It was
full of prairie dust (Calgary). I'm hoping the worst of the problems will
be dirty board inter-connects.
Thanks!
Keith
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