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A bit O/T but that's not a "China" thing but an industry thing. Can't blame the Chinese for that one. I have done it myself to avoid the regulatory capture that is the FCC/IC, etc.

Radio transmitting 4 watts, channel 20, no modulation. I did the test on a Siglent SSA3032X with BBIs span with and without an amp. Never saw anything. Using a Bird variable RF sampler between radio and dummy load. At that span with an RF sampler knocking 50dB off its in the noise +20dBm on the...

I checked a few older 8719 radios I have here that have the S042P and they did not have any leakage that I could see. I ran it into a 100W amp and checked again and still no discernible 7.8 or 35Mhz leakage. I can't say I have ever seen VCO or carrier osc leakage out of one of these radios...

There is that. I can't remember the last time I have seen in my short time looking at CB repair videos where someone shows EVERYTHING. They all seem to cut them off at ~52Mhz. The trickery is very real. I can't understand why Siglent is supposedly endorsing him, if that's to be believed.

He doesn't know how to use the instrument. I need to know more but watching his videos is cancer, especially after the antenna video. Attenuation is likely needed. He could be running 1kW of his nasty signal thru a sample port that may generate a still dangerous level of RF for the instrument...

Wait. A properly designed and built amplifier? I never understood why these guys like BBI and friends can't make something at least halfway decent. Now the antenna thing is gold.

People that try this stuff with linear power supplies are almost always after one of two mystical creatures that can be proofed long before you even think about swapping parts: 1. More power 2 Cooler operation They see something like more current handling and think.. more power, or it must run...

You can do a pass/fail test with something like the 370 because it's GPIB. Just a matter of making a jig if required and writing the software. The reason devices like the DCA can't do pass/fail is they don't know anything about the DUT. If you write an application for the 370 you can insert the...

I have heard the "I can get it to within 1Hz by ear" from several techs. BS, plain and simple. Can you get it to within 10s of Hz by ear? Sure. That's actually good enough. We are talking about AM or SSB here. They are not that critical. It's not QAM or some other digital signal that requires...

The DCA55 read just a touch higher but that's within a margin of error. We really don't care about such small differences. It's good enough and close enough. The only thing it does not do is more than a few mA unlike the RCA or the Tek 370. The RCA or the Tek are where I go if I really question...

Paralysis thru analysis. Too much noise... A comparison of tools. Test subject is a 2SC1969 (original NOS) DCA55 = 48 RCA WT-501A = ~46 Super Cricket = ~47 Some Chinese thing I have with a ZIF socket = 47 Tek 370 Curve tracer (numbers crunched) = 47 All tested with < 5mA Most of these...

Those transistor checkers are good for basic tests... like does it look like a transistor, etc. Also for the unknowns - what does it think this part is.. Not sure why you can't get a good portable tester anymore. Probably because it can't fit in a pocket. I still have several made by Leader...

Keep digging Rabbi. You might guess correctly one day.

Nope. Not interested.

BS. It's not worth arguing with you. I can point out a half a dozen problems with your god's "tuned bench" and why it's nowhere near "NIST compliant" but you will find an excuse for every. single. one. Or claim that I/we don't know the laws of physics. Why don't you leave these people to their...

Wrong thread @Handy Andy ? I call that a senior moment :)

It depends on what you mean by test equipment. I actually have very few pieces of test equipment that go inline. Most of the time you are sampling a signal, not directly influencing it.

Having all of those jumpers should not affect the SWR in any meaningful way. If it does you have a problem. The length also should not matter .. but here is a really good answer regarding that. https://www.worldwidedx.com/threads/coax-length.234057/page-2#post-642422 Edit: I want to add that...

Doing that in logic would be rather large, unless implemented in a HDL. That would be like using C4 to kill ants, not to mention the time to design it. A microcontroller is the way to go for something like this. That RF performance has to be improved or your receiver is going to sound like...

Doc Terminus is another one that comes to mind.