Re: Another scope 7854
yOn Thu, 4 May 2017, David @DWH [TekScopes] wrote:
Wow! I want to be you when I grow up! C375 was indeed shorted. I understand why this affects the gain, and would be able to follow it better if it were a modern OpAmp rather than discreet transistors (I can't visualize those as well yet).
I got a suitable replacement from my local store and will swap it out later today.
The occasional triggering glitch I think must by the cam finger switches on the AC/DC/GND/DC Offset switch. I got them to go away on channel 1 through exercising the switch, but channel 2 still has this glitch. I need to figure out the best way to physically access these to clean them with as little disassembling as possible. Will have a look at that too.
Thanks so much for the help.
Also, in addition to the averaging the 7854 does have the cursors and measurements built-in over the 7904. They are actually relatively easy to use, about the same as my 2232, though having a knob for the cursors is nicer than the buttons.