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On Fri, Nov 23, 2018 at 05:11 PM, Chuck Harris wrote: > > I have to wonder what were your settings for H Voltage, and > V Current, Supply voltage and load impedance, and your step size. > > You can

Hi Craig. The question of isolation transformer never really goes away. If you continue earthing of say an isolating transformer case to a ‘consumer’ case when servicing consumer/appliances you

I have to wonder what were your settings for H Voltage, and V Current, Supply voltage and load impedance, and your step size. You can curve trace a 3055 at amps of current, or you can trace it at

That again. No it's not an absolute requirement that there is a ground connection to the output of an isolation transformer. In fact european standards absolutely demand that there not be one. The

For whatever it might be worth, I tried six variations of 2N3055 on a 577 that has had only enough repairs to keep it functioning. The 3055's varied with a 3055H and a 3055HV mixed in with epitaxial

Hi All The CATS (Crawley Amateur Transmitting Society) rally is correctly known as the CATS Bazaar, it was not last month but is was held on the 15th November. If you are into Amateur Radio or T&M kit

I'm not at all surprised - a 2N3055 is a power transistor with a very large junction area. So it has a very high capacitance. I'd have to look it up, but one of Tek's curve tracer manuals sets out a

That part is good. That is a bit on the nasty side. I'm more concerned not with the doubling of traces (which could be argued), but the lack of blanking showing through. Is there a blanking waveform?

This has, as one recommendation, using an isolation transformer. However, it is an absolute requirement that there is ground continuity between primary and secondary of an isolation transformer. Think

Still working on my 577 (see my other post regarding power supply restoration). Voltages are all good now (after replacing all electrolytic caps and tantalums on the power supply and collector supply

Hi, It is a 5L4N Accessory. Some clues are given in its Manual. Greetings, Egge Siert

I bought a Hantek dual trace 200 mhz scope about a year ago. It cost about 350 bucks. I also have a couple of 465 scopes. The Hantek has its advantages in some situations. Of course be reminded it is

Randy, Please read my entire mail and then respond appropriately. Dennis Tillman W7PF

I recently "inherited" two 2215 Tek scopes both dead... Both have cover screws missing.... Unit #1: Someone ripped the anode lead off the CRT! Is there any way way to reattached the anode lead to the

On Tue, Nov 13, 2018 at 07:31 PM, Chuck Harris wrote: > > I had a consulting contract years ago to help a > Swedish company with a problem they had in converting > from European 240V to the USA 120V.

Thanks a lot everybody. It seems just for my 2465B it's not a very useful part... But the link from Dale Chayes was very interesting i didn’t find it. Thanks Rolf

I to would like this link if available.

The “low” side of every BNC instrument I’ve looked at closely is tied to the AC power ground. Sometimes there are good reasons to disconnect that ground and make a measurement that is not

It would only work if your input was already floating, say for example a TPS2024 or scope meter, and allow you to attach two probes in a differential configuration. The shell is unlikely to present a

On Fri, 23 Nov 2018 04:26:56 -0800, you wrote: For measuring AC ripple at 120 Hz, I'd look at the ripple, but triggered on line. Measure anything that stands still.... Ought to get you close. Harvey