Comment: Re:Good to hear from you! (Score 1) 10
Comment: Re:Good to hear from you! (Score 1) 10
Comment: Re:Lots of failures there. (Score 1) 297
Comment: Re:Lots of failures there. (Score 1) 297
Comment: Re:The answer appears to be a yes. (Score 2) 297
You have to be joking or you've forgotten what we're talking about. This is an apogee kick motor (to use GPS parlance) to take a 2 ton space vehicle to a circular 22,000 mile orbit. GPS, having half the orbit and half the weight, has an AKM which is not small. It's huge. It has to be due to the amount of firing it's intended to do. I tried Googling an image to show my point, but unfortunately, the AKM is on the "non-sexy" side of the SV and, hence, no photos. We're not talking about
That said, yes I believe the author was undermined by a bad source, or at least the Air Force Magazine article I read which is cited. He is quoted as saying it was a surprise that hydrazine had a warm-up period, and made it sound as if the 50th was flying this bird alongside operable satellites. We've known for over 40 years hydrazine is more consistent when pre-warmed. This is why GPS fires up pre-heaters before every stationkeeping maneuver. Pre-heating gives more reliable, and predictable vectors.
Comment: Re:The answer appears to be a yes. (Score 2) 297
Comment: Re:Is your parting line supposed to be a critisism (Score 4, Insightful) 182
Comment: Re:Is your parting line supposed to be a critisism (Score 2) 182
Comment: Re:They may be mocking the price but (Score 1) 369
With a wavelength of just under 10 miles for a 15kHz signal, the necessity of shielding is a matter of how long your speaker cable is.
Most people seem to have speaker wires that make great quarterwave dipole antennas annoyingly near the 15M / 10M / 6M ham radio bands or the 11M CB band. The problem is some classical, lets say, pre 00s audio output final power amps have something of a rectifying effect on the incoming RF. So you end up hearing clearly every trucker who drives by. Trivially fixed with a bit of shielded coaxial cable. Assuming your negative speaker lead either can be grounded, or already is grounded, a couple minutes with a swiss army knife and a length of old antenna / cable tv coaxial cable will either result in a trip to the ER if you have low DEX statistics, or a nice shielded speaker wire ready to install.
You can also spend some dough on RF ferrite chokes, but frankly its usually cheaper to use scrap cable, assuming you have some laying about.
If anyone reads this and decides to try it, be very careful. I'm somewhat certain grounding a speaker wire will do very bad things depending on the Class of Amp you're using for your home stereo. In other words, I would not try this under most circumstances and with 100% knowledge you might "let the ghost out" of your amps IC board.