He has called for NASA to get out of the Earth Sciences area (after all, that AGW stuff is all a Chinese hoax), and focus on making Mars Great again or something....
where the wires from the pins need to pass into the evacuated envelope. The rest of the vacuum-tight enclosure IS the metal can itself. The first metal tubes used tiny individual glass/metal eyelets for each pin, but later ones used a glass "button stem" that held all the lead-in wires in a single piece of glass.
Shortly after the metal tubes were introduced by RCA, some other manufacturers introduced the "MG" types, which were as you describe, a conventional glass tube covered with a metal can. This was done in an attempt to appear "cutting edge" with the then modern technology, but not wanting to invest in the specialized production machinery needed, and to avoid licensing the technology from RCA.
So can we skip the right-wing talking points, please? Tube manufacturing was certainly no more toxic than semiconductor fabs are (one of the most toxic industries around), and they aren't going away because of EPA regs.
US tube manufacturing died because the market for tubes went away VERY quickly once solid state devices took over in the late '60s/early '70s.
One example would be RCA, who introduced their first 100% solid state (except for the CRT) color TV sets in 1969, and closed their receiving tube plants (the largest in the US) by 1976.
With 15-20 tubes in a typical color TV set, there was a HUGE replacement market for receiving tubes and many US manufacturers each with several plants to meet the demand. Typically you would need to replace 2-3 tubes a year in a TV you used regularly. Self service tube testers (and replacement tubes) were found in drugstores and hardware stores for folks who wanted to try fixing their own sets.
Once tubes went away in new sets, the market for replacement tubes evaporated within a few years as the older tube sets hit the landfills. The relative handful of tubes still being sold were made in short runs from 1 or 2 US manufacturers who stuck it out until the '80s making a handful of types that still had some demand, but these quietly died by the early '90s, when the US military stopped supporting most of their tube-based gear and flooded the surplus market with warehouses full of unused tubes.
Tubes are still made in the US by a handful of manufacturers, but they are specialized devices used in high powered transmitters, radar, particle accelerators, and such. The ordinary receiving type tubes used in audio gear are largely made in the former Soviet bloc, which kept the remnants of their tube industry alive longer than the West did, preserving much of the manufacturing and raw materials infrastructure needed to serve the modern (much smaller) market for receiving tubes.
But generally only the exotic special purpose and transmitting types. The commodity 12AX7s and 6L6s for guitar amps are all made offshore, due to the low profit margins. The only audio types being made in the US are Western Electric 300B triodes, which are still being made in limited numbers for the high-$$$ audiophool market.
Although it would generally be overscored when written, and sent as one long character (...-.-) Use as a reference to a deceased operator is secondary.
The end of contact turn-over prosign is usually sent in lieu of the prosign K or the prosign at the very end of the last transmission from the transmitting station, to indicate the termination or end of a particular contact (conversation) between two stations, thus turning the communications channel over to other users. The prosign may be interpreted in English as, this station will be "silencing key". Often when terminating a contact with the prosign, a transmitting station may continue listening on the communications channel for calls from other stations.
Playing music over the CB bands is a clear violation of the applicable rules, and voices coming through your toaster is a pretty clear indication that the CB is putting out considerably more than the allowable RF power level. of 4 watts AM or 12 watts for SSB.
For better or worse, most ham operators these days use commercially made equipment, which is tested for spectral purity, so any significant output on broadcast or cellular bands is highly unlikely.
What often causes amateur band RFI/TVI nowadays is lack of filtering/shielding in cheap consumer electronics, to allow them to reject signals outside of their operating bands. Such "frills" are among the first design features eliminated in order to lower the selling price at WalMart.
If the ham operator is putting out a clean signal, within legal power limits, then this type of interference is strictly the problem of the person being interfered with. Most hams are more than willing to lend a hand resolving the problem just to be a good neighbor, but they have NO legal responsibility to go off the air or repair design deficiencies in your TV, router, or whatever. And the FCC will simply point out the Part 15 regs that lay this all out. Your consumer electronics cannot interfere with any licensed service (like ham radio), and must accept any interference FROM a licensed service.
and the biggest "attack vector" against cell phones would be the "stingray" being deployed by your local police department.
But sure, we have to crack down on ham radio so you can feel safe. Because somebody who wants to secretly jam communications is going to put up a big, obvious antenna installation in order to do so.
when they invent a way to make radio waves stop at state borders. Until then, federal (and international) regulations are the only ones that make sense.
And some people say that the Muslim population refuses to assimilate and adopt American ways of life. What could be more truly American than self-enrichment via litigation?
"Micronta" didn't make anything. It was a brand name that Tandy used on clocks, multimeters, and other test equipment, which were generally made by Asian subcontractors.
AFAIK, RS never offered a line powered digital clock as a kit. Certainly not the one repackaged by this kid. There are several sites online which compare his project to the original clock. It does appear to have been nothing more than removing the guts and putting them in another box.
On the contrary, I have built MANY Heathkits, up to and including a 70s era 25" color TV and a "Hero Jr" robot.
But Heathkit was a separate company, never a Tandy/Radio Shack brand, like Micronta, Radio Shack's kit line were called "ArcherKits", and were nowhere near as nice as Heathkits....
âoeThe Chairperson shall be responsible for ensuring that the national officers and staff of the Democratic National Committee maintain impartiality and even-handedness during the Democratic Party Presidential nominating process.â
I knew she wouldn't PICK Bernie (as if he would have accepted), and had a strong feeling she wouldn't go with Warren (wouldn't want another woman with better progressive bonafides sharing her spotlight). But to go with Someone as pro-TPP and pro-establishment as Tim Kaine is an obvious sign that she is just assuming that the progressive wing of the electorate will just fall in line anyway, and that any concessions given to Sanders in the platform process will be tossed aside immediately after the election. Trying to court moderate repugs who dislike Trump is more important to her than solidifying her own party, especially when it might make the big $$$ donors uneasy.
Between her VP pick and the latest Guccifer document dump detailing the DNC's program of sabotaging the Sanders campaign, I am hoping that Bernie takes a page from Ted Cruz' playbook and uses his keynote speech at the convention to urge progressive voters to vote their conscience, and go for Jill Stein!
Nixon couldn't successfully cover up a simple burglary involving a handful of people, but he was able to cover up a fake moon landing involving tens of thousands?
Slashdot Mirror
Cheech and Chong noticed this years ago....
https://www.youtube.com/watch?...
He has called for NASA to get out of the Earth Sciences area (after all, that AGW stuff is all a Chinese hoax), and focus on making Mars Great again or something....
http://arstechnica.com/science...
I would ASSume that the helium is used to pressurize the fuel and oxidizer tanks. Would be stored as a liquid to save space...
where the wires from the pins need to pass into the evacuated envelope. The rest of the vacuum-tight enclosure IS the metal can itself. The first metal tubes used tiny individual glass/metal eyelets for each pin, but later ones used a glass "button stem" that held all the lead-in wires in a single piece of glass.
Shortly after the metal tubes were introduced by RCA, some other manufacturers introduced the "MG" types, which were as you describe, a conventional glass tube covered with a metal can. This was done in an attempt to appear "cutting edge" with the then modern technology, but not wanting to invest in the specialized production machinery needed, and to avoid licensing the technology from RCA.
So can we skip the right-wing talking points, please? Tube manufacturing was certainly no more toxic than semiconductor fabs are (one of the most toxic industries around), and they aren't going away because of EPA regs.
US tube manufacturing died because the market for tubes went away VERY quickly once solid state devices took over in the late '60s/early '70s.
One example would be RCA, who introduced their first 100% solid state (except for the CRT) color TV sets in 1969, and closed their receiving tube plants (the largest in the US) by 1976.
With 15-20 tubes in a typical color TV set, there was a HUGE replacement market for receiving tubes and many US manufacturers each with several plants to meet the demand. Typically you would need to replace 2-3 tubes a year in a TV you used regularly. Self service tube testers (and replacement tubes) were found in drugstores and hardware stores for folks who wanted to try fixing their own sets.
Once tubes went away in new sets, the market for replacement tubes evaporated within a few years as the older tube sets hit the landfills. The relative handful of tubes still being sold were made in short runs from 1 or 2 US manufacturers who stuck it out until the '80s making a handful of types that still had some demand, but these quietly died by the early '90s, when the US military stopped supporting most of their tube-based gear and flooded the surplus market with warehouses full of unused tubes.
Tubes are still made in the US by a handful of manufacturers, but they are specialized devices used in high powered transmitters, radar, particle accelerators, and such. The ordinary receiving type tubes used in audio gear are largely made in the former Soviet bloc, which kept the remnants of their tube industry alive longer than the West did, preserving much of the manufacturing and raw materials infrastructure needed to serve the modern (much smaller) market for receiving tubes.
But generally only the exotic special purpose and transmitting types. The commodity 12AX7s and 6L6s for guitar amps are all made offshore, due to the low profit margins. The only audio types being made in the US are Western Electric 300B triodes, which are still being made in limited numbers for the high-$$$ audiophool market.
http://www.westernelectric.com...
Other remaining US tube manufacturers include CPI/Eimac:
http://www.cpii.com/division.c...
and MU, Inc. :
http://www.mu-inc.com/webstore...
, who apparently hang on making small runs of tubes to support aging military gear...
https://www.youtube.com/watch?...
https://www.youtube.com/watch?...
Although it would generally be overscored when written, and sent as one long character (...-.-) Use as a reference to a deceased operator is secondary.
Per Wikipedia: https://en.wikipedia.org/wiki/Prosigns_for_Morse_code
The end of contact turn-over prosign is usually sent in lieu of the prosign K or the prosign at the very end of the last transmission from the transmitting station, to indicate the termination or end of a particular contact (conversation) between two stations, thus turning the communications channel over to other users. The prosign may be interpreted in English as, this station will be "silencing key". Often when terminating a contact with the prosign, a transmitting station may continue listening on the communications channel for calls from other stations.
Playing music over the CB bands is a clear violation of the applicable rules, and voices coming through your toaster is a pretty clear indication that the CB is putting out considerably more than the allowable RF power level. of 4 watts AM or 12 watts for SSB.
For better or worse, most ham operators these days use commercially made equipment, which is tested for spectral purity, so any significant output on broadcast or cellular bands is highly unlikely.
What often causes amateur band RFI/TVI nowadays is lack of filtering/shielding in cheap consumer electronics, to allow them to reject signals outside of their operating bands. Such "frills" are among the first design features eliminated in order to lower the selling price at WalMart.
If the ham operator is putting out a clean signal, within legal power limits, then this type of interference is strictly the problem of the person being interfered with. Most hams are more than willing to lend a hand resolving the problem just to be a good neighbor, but they have NO legal responsibility to go off the air or repair design deficiencies in your TV, router, or whatever. And the FCC will simply point out the Part 15 regs that lay this all out. Your consumer electronics cannot interfere with any licensed service (like ham radio), and must accept any interference FROM a licensed service.
and the biggest "attack vector" against cell phones would be the "stingray" being deployed by your local police department.
But sure, we have to crack down on ham radio so you can feel safe. Because somebody who wants to secretly jam communications is going to put up a big, obvious antenna installation in order to do so.
when they invent a way to make radio waves stop at state borders. Until then, federal (and international) regulations are the only ones that make sense.
https://en.wikipedia.org/wiki/Campaign_for_%22santorum%22_neologism
http://www.npr.org/2016/09/09/...
With all the corporate crime going on, it is easy to get your scumbags mixed up....
Can you imagine what kind of backups we will see at airport security lines when they start dragging giant wooden horses through the metal detectors?
http://vivoleum.com.yeslab.org...
spilled his bong in the pool again...
And some people say that the Muslim population refuses to assimilate and adopt American ways of life. What could be more truly American than self-enrichment via litigation?
Heathkit built a micrometer? That needs a power supply?
"Micronta" didn't make anything. It was a brand name that Tandy used on clocks, multimeters, and other test equipment, which were generally made by Asian subcontractors.
AFAIK, RS never offered a line powered digital clock as a kit. Certainly not the one repackaged by this kid. There are several sites online which compare his project to the original clock. It does appear to have been nothing more than removing the guts and putting them in another box.
On the contrary, I have built MANY Heathkits, up to and including a 70s era 25" color TV and a "Hero Jr" robot.
But Heathkit was a separate company, never a Tandy/Radio Shack brand, like Micronta, Radio Shack's kit line were called "ArcherKits", and were nowhere near as nice as Heathkits....
So what does a Micronta clock have to do with Heathkit?
DNC worked with Hillary, and favored Hillary. Why should they not, when they dont decide the candidate, and the people do.
Why shouldn't they? Their own bylaws and rules (Article 5, Section 4) , for starters...
http://www.demrulz.org/wp-cont...
âoeThe Chairperson shall be responsible for ensuring that the national officers and staff of the Democratic National Committee maintain impartiality and even-handedness during the Democratic Party Presidential nominating process.â
I knew she wouldn't PICK Bernie (as if he would have accepted), and had a strong feeling she wouldn't go with Warren (wouldn't want another woman with better progressive bonafides sharing her spotlight). But to go with Someone as pro-TPP and pro-establishment as Tim Kaine is an obvious sign that she is just assuming that the progressive wing of the electorate will just fall in line anyway, and that any concessions given to Sanders in the platform process will be tossed aside immediately after the election. Trying to court moderate repugs who dislike Trump is more important to her than solidifying her own party, especially when it might make the big $$$ donors uneasy.
Between her VP pick and the latest Guccifer document dump detailing the DNC's program of sabotaging the Sanders campaign, I am hoping that Bernie takes a page from Ted Cruz' playbook and uses his keynote speech at the convention to urge progressive voters to vote their conscience, and go for Jill Stein!
Nixon couldn't successfully cover up a simple burglary involving a handful of people, but he was able to cover up a fake moon landing involving tens of thousands?