So I am finally working up the nerve to put an AA501 on the bench and run it through its checks. From a preliminary check in It looks like the voltage section is working well and tracking with my

Tks for the feedback Panos, I'm afraid I'll have to go through the calibration process. Em 26/12/2019 19:37, Panos escreveu:

One of the calibration procedures produces those series of dots when setting the vertical limits, if I remember correctly. It would appear that whatever initiates that procedure is somehow "stuck

If memory serves me correctly, the package for a 2N5911 has a different lead configuration from the 151-1032-00 Tek part. I'm also going to note that all my references for this part are labeled

Hi. From your video I think that your Grid Bias setting is too high or out of range. The sure is that the dots in the bottom of the screen indicate a loss of your calibration settings. :-( Panos

The 7S14 uses a 2K resistor in series with each battery. 20uA photocurrent implies a slope resistance of around 2.5K for a photodiode with n =2. This more than doubles the series resistance and adds

Hello everybody, I just bought this Tektronix 2465 oscilloscope here in Brazil. When turned on, you can see blinking dots on both, upper and down fields, that show the unit status - see my video on

Sorry, LH1262 is correct. LCs were a different family Tom

Been a long time since visiting TekScopes. In the mean time I restored over half a dozen 455 scopes, the ignored 50 MHz sibling of the 465M (heh, heh, much easier to work on with plug in

Oh, LH1262, not LC1262. Short-circuit current is a few uA, I wonder what it puts out at a couple volts. There are lots of PV-output SSR's, many of which put out more, but still only 10-20uA max.

Can you confirm that part number, Tom? Mouser returns zero hits on "LC1262". And what's the output current? This is probably one of those photovoltaic-output SSR's like I mentioned a moment

There are isolated gate drivers, but it turns out that Mouser's parts in this category require a floating power supply. But there are SSR's with a photodiode array output, also intended for driving

Those will have a common ground, so will still contribute to ground loop induced voltages --> noise. Or are there opto coupled drivers? The opto solutions float like a battery and only have some

How about a power MOSFET gate driver IC? There are lots of those around. Dave Wise

I haven't been following too closely, but just remembered some old Western Electric parts that Vishay still makes. These may be of value to consider for this mercury battery replacement. Take a look

Bruce Griffiths wrote: Leon Robertson wrote: A lot has been written about this subject over the years and several people showed their (photovoltaic) suggestions. Examples: - A few years ago, Ed Breya

Good Morning! Here is an update on my Type 576 Curve Tracer HV Transformer replacement project. I have completed the testing phase without a problem. The transformer and unit ran for a total of 135

That's 2 series connected silicon photodiodes with a shunt capacitor per battery. Bruce

You'll need to series stack a couple of silicon photodiodes for that to work. The photocurrent will need to be around 50 microamps or so to keep the output resistance low enough. A shunt capacitor may

Would a led to photodiode optocoupler work? Leon Robinson    K5JLR Political Correctness is a Political Disease. Politicians and Diapers should be changed often and for the same reasons.