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Hi Attilio, You're almost there. The 2095 MHz LO should be just fine - remember it's controlled by the crystal oscillator, as long as the PLL is working. So, it looks like you just need to lower the

Hi guys, I was checking my 485 against calibration 1kHz and 1MHz signals. - 1kHz is nicely displayed by the scope. - 1Mhz is not giving me a "perfect" square wave. I hooked up my cheap FY32124S

Try pushing in the 20MHz bandwidth limit switch. I prefer setting the focus and astigmatism controls with a sine wave displayed and the 20MHz bandwidth switch pushed in. -- Bob Haas

Thanks Raymond, I can’t dish out that kind of money for a UPS at the moment. Thanks for the tip and explanations anyway.

0.08Ω I did that on both scopes. The results on both are: From ground inside the scopes to: 1 - Ground cord terminal = 0.12 2 - Hot lead

Hello everybody Ed, I understood the matter of the finger on the oscillator at 52.500 MHz, putting the finger the oscillation frequency is lowered to 52.497 MHz and I can recover the track by acting

Hi Stephen, That's why I came up with a "UPS" (Uninterruptible Power Supply) in my previous message. The kind I had in mind is a self-contained shoebox-sized device, containing a battery and an

Raymond, I would gladly try this and do what Jouko suggested. However, I don’t have neither a car battery nor an inverter at my disposal at this time.... As a matter of fact, I don’t even own a

The beeswax transformers look like they are globbed with beeswax. The epoxy transformers either have a clear to slightly brown milky varnish over the wires and tape, or are molded in brown epoxy.

I'm not at all convinced that this is the way to proceed. Should you consider trying it, make sure that the output voltage and waveform are reasonably OK. Many affordable inverters are lacking in this

Back in the late '60's, Wavetek used the 2N3438 in place of zeners, Then Fairchild changed their process, and suddenly the breakdown voltage was raised about a volt. Suddenly, everything coming to

On Thu, Feb 25, 2021 at 12:38 AM, Jouko Koskinen wrote: Interleaved. > > Hi Stephen, > > That means getting a 12V car battery and inverter which generates 230V AC. > In that way you are disconnected

Hi Stephen, That means getting a 12V car battery and inverter which generates 230V AC. In that way you are disconnected from possible mains distribution problems. You mentioned that now you have 2

Thank you Ed. I will definitely do what Steven helpfully suggested. It had apparently never been opened before. There are no signs of any mistreatments, dents, or anything. It’s pretty clean. As far

How do you do that?

I have the same question. I also curious to know if anyone has tried to use one of the current 8kx8 EEPROMs (I'm thinking the 5V 150ns 28TSSOP AT28C64, ~$4) along with a 24DIP adapter to build a

I have a long history with Rifa PME271 X2 caps. Actually, an explosive history. My standard replacement is the Vishay 338x or 339 series - much higher voltage ratings at 310VAC and 440VAC. Replacement

It is what I read about and I think I read it in Peter Keller's book, which I haven't with me where I currently am. Raymond

I have Peter Keller's book, but have not reached that part of the book. I may have experienced this phenominon on my 7623A which had been sitting for a long time. I had stored the scope for about 6

I thought I read about the recovery process that may happen in long-unused CRT's by just leaving them on for a time, even without temporarily increasing filament voltage in Peter Keller's book. OTOH,