Parametric amplifiers use varactor bridges in some way that... I don't understand fully either. Some trick that allows you to cheat physics regarding noise floors by charging a weak signal into a variable capacitor when it is set at high capacitance, then you lower the capacitance and force the voltage up that way and sample it. The part around 28:00 could certainly be a bridge of varactors.
Guess at around 22:00: The big resistors there are MEANT to heat it up, the whole case acts as a thermostat. Would explain why you need a big relay also. Is there some temperature sensor to be found?
Before low noise HEMTs were available, parametric amplifiers were used as low noise input preamplifiers. So here, the waveguide is actually the input, and the MBC box is the paramp with varactors. The stuff above is the "pump" generator, which has to run at a higher frequency, as you can see from the tiny waveguide with the tuning screws. How does a paramp work? Imagine an air capacitor that you charge up to some voltage. The charge will cause an attractive force between the capacitor plates. Now, if you pull the plates apart, you will work against that force, adding energy to the capacitor. With an AC signal, you can periodically push and pull the plates, to amplify it. Instead of pumping the capacitor, you can use a varactor, and "pump" it with voltage. Pramaps are obsolete today, because you can make a simpler LNA with modern HEMTs (high electron mobility transistors), found in every SAT-TV LNB. The only time I encountered a paramp, was in a Marconi S600 radar, which worked in L band, and used a X band pump. Marko Cebokli
That grey blob whit gold tracks U tracks on alumina ceramics (or teflon) is a interdigital filter. By the size of them frequency is well ower 1 Ghz (near 10Ghz). Black boxes whit straight screws are most likley RF isolators. First box to waweguide looks like a filter whit some kind of mixing chamber as well since RF signal is coming from golden component as well. That litle box whit three gold windows welded and pass thru capacitors coud be what we are looking for.
It's a parametric amplifier, so the first mystery box likely has some high frequency varactors being pumped by the millimeter wave pump oscillator with the tiny waveguides. A 1300MHz parametric amplifier required 9-10GHz pumping oscillator. So this thing likely has a tens of GHz high power oscillator. If the waveguide flanges are standard and not custom, it is possibly WR-28 (meant for 26 - 40GHz), but the sections look thinner than that. So it could be WR-19, which is the smallest size with normal square waveguide flanges. WR-19 is rated for 40 - 60GHz use and that sounds feasible for an X-band preamplifier. And that I know at least one dude with a 47GHz high power Gunn-oscillator pulled from some surplus parametric amplifier. Is the waveguide flange input to the box 1.12inches wide at the wide part (WR-112, 7-10GHz) or 0.90 inches wide (WR-90, 8.2 - 12.4GHz)? The N-type output connector is rated for 12GHz max. WR-112 could be microwave link or satcom use. WR-90 is far more likely to be radar related.
That looks to be high quality, all metal and quality electronics, All metal case to stop jamming and more protection from shrapnel from being shot down.
4:39 j'ai du mal à comprendre vos intentions : j'ai posté en commentaire le nom de l'Iranien, du Chinois et du Russe ( trouvé en 5mn ,merci google) et mon post a été supprimé ... par vous où par youtube ?
not necessarily, there are many ways how to smuggle . Even US military components are in Russia recently sold by HU company in US via Spa8n, Serb, ... to RU
well rest of the world outside eu/usa does not realy care with embargo... everything produced in china... and they is in a same trading alliance in the brics.
If you would like to learn more about the internals of a device like this I strongly suggest you search for "La Labo De Michael" because he goes really in depth on these things about all the parts and how it all works.
Really InTeReStiNg. Thank you for speaking in English. Much appreciated. Very COoL servo (gear stack and billet housing). You know now that you've taken it apart I don't think the company will honor the warranty Cheers from So.Ca.USA 3rd House On the Left.
@@GlutenEruption Well, I noticed that the Chinese online store now refuses to supply some electronic components to us in Belarus because of sanctions, as well as to Russia. Although if you set Kazakhstan in the settings, then everything will be found at once. Belarus is not at war against Ukraine, but there are sanctions on us too
motor looks very like a common inkjet printer motor as well, no surprise to have an existing commercial motor there, making it cheaper to make. Case looks like it is spin cast, not machined, the tooling marks are from the original mould, the rounded off soft corners on the marks are a give away. Might have some minor work done on it to finish it, but definitely a spin cast item. At least that donation to the Ukrainian war effort will not go to waste.
ANR is automatic (or active) noise reduction - this is indicated by a gold rather than black front panel. To get the benefit of ANR you need to use the green rather than the black Clansman PTT and headsets. ANR reduces vehicle noise on the intercom and radio. Monitor and working are connected to left and right earphones (the Clansman headset is stereo with separate pins for left and right earphone) so you can hear one radio net in each ear or one radio net and intercom.
I used to recharge the desiccant bags in a small toaster at 150°f for a few hours until the crystals turned blue. I used them in an underwater camera. Thanks for the teardown.
Chat GPT says "Active-In Commission warfare," known as ACTIC in the British military context, refers to a covert form of warfare or military strategy involving unconventional or irregular tactics. This can include intelligence operations, sabotage, psychological operations, and other methods designed to destabilize or weaken an enemy without direct or open engagement.
This is NOT from Sirena-3, this is a forward hemisphere antenna from SPO-15LM!!!!! It's from aircraft like MiG-29 and Su-27, it was never used on MiG-21
