Re: Tektronix 492BP


John Miles
 

It's not a question of them being set incorrectly, it's a question of whether their contacts actually match their settings.

The DIP switches used by Tek in this era are extremely failure-prone due to aging. But normally they are OK until they're toggled on or off for the first time in 20+ years. You can rule out the switches by checking them with an ohmmeter to see if the ones that are in the 'OPEN' position are actually open (i.e., med/high resistance across the contacts.) Likewise for the others, with ~0 ohms expected across the contacts for the switches that are closed.

-- john, KE5FX

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Mike Yepes
Sent: Thursday, January 14, 2021 8:54 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tektronix 492BP

The only boards with dip switches are the memory board and the vertical
digital storage board. I have no idea which ones supposed to be on or off.


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