What’s On the Bench Tonight (OBT)

Raptor is 2D Thrust Vectoring Capable, Indo-Russian SU30MKI [NATO REPORTING: Flanker H] can do 360 degree, it is insane [ When Russian Aerodynamics meets Indian Avionics and Control Laws]


I highly doubt Raptor will ever need to dog fight honestly , it is invisible to X Band Radar , Enemy BVR Missile cannot even lock on it let alone shooting down at distance.

If u get good luck , keeping up with F119 throwing over 156KN of Thrust.
 
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India's space agency Apparently started testing LOX/Methane Engine which is VTVL Capable,
Plus Methane can be made for Biomass!
May be someday i can launch my homemade rocket with small satelite from my backward to
look at Aliens, that some dreams which i will make reality in my late 30s.
Anyone here knows about Hacksmith Industries? They even made Light Saber from Star Wars.
 
I was going through my bench drawers and I see a neat project that SuzyJ designed for a 5W Diamond Amp with a bunch of parallel BTJ outputs. She was kind enough to send me the boards all the way from Oz back in 2017. I have all the actives purchased in Mouser bags still. The passives I’ll have to scrounge up. But maybe this is a fun little project to try in the new year?

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That’s a lot of little parts for a 5W amp. Maybe headphone duties or a very high sensitivity speaker.
 
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Hi Folks,
I have a new product I have been working on called the SnubWay. It’s a parallel plug in AC mains noise filter to help reduce SMPS noise contamination in your audio system. It’s a parallel 5 filter tuned LRC circuit that I designed in LTSpice. It should work from 10kHz to 1MHz. In practice it will also have lightning surge protection using a varistor/gas discharge tube (GDT) on the same circuit. I made a video to demonstrate how it works here.


The reduction will depend on the impedance of your offending noise source and the higher, the better. I assumed for the purposes of this demo that it is 1kohm.

Here is a render of an early concept. We are getting it quite a bit smaller, down to three or four stacks of PCBs now.
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More than 30 dB. But, how much two? In series is easy but in parallel.. != 60 dB
It’s a parallel plug in you cannot put in series. If you want more attenuation, the other product I am designing, which is a series design with 4 CLC filters in series achieves -130dB. Literally a Line Noise Black Hole (LNBH).

But that is a series system. There is an In and an Out plug - so not as compact or convenient.

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On the bench tonight I am repairing an old mechanical travel alarm clock (circa 1970’s a Westclox - made in Brazil). I haven’t touched it in 30 years and it stopped working long ago. It has sentimental value so I decided to see if I could fix it. I just used some pure ethanol in a dropper and cotton swabs to clean up the gunked bearings around the balance wheel and escapement. Added some household sewing machine oil thinned with alcohol on the bearings. Works again and still keeps fairly accurate time given it ishand wound. The alarm bell is amazingly loud.
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It’s a parallel plug in you cannot put in series. If you want more attenuation, the other product I am designing, which is a series design with 4 CLC filters in series achieves -130dB. Literally a Line Noise Black Hole (LNBH).

But that is a series system. There is an In and an Out plug - so not as compact or convenient.

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But it is the most effective, as long as so much excess filtering does not penalize the dynamics.

As is known, the Magnat MA 900 hybrid integrated (December 2022) in my second audio system required a third Schaffner filter to have a great sound, in addition to many hours of break-in of the JJ 12AT7 tubes and, perhaps, the electrolytic capacitors.