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Building a new shortwave tube radio
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Building a new shortwave tube radio
On 11/14/11 6:26 PM, John Smith wrote:
John Smith confessed once that he sleeps with a side arm under his pillow! Hey, in the military I learned to sleep with my weapon ... now that the streets of America are becoming a war zone with the aware population squaring off against the criminals, I'd suggest it to everyone! Not my rifle, but with my gun. |
Building a new shortwave tube radio
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Building a new shortwave tube radio
On 11/14/2011 5:24 PM, Howard Brazee wrote:
On 11/14/11 6:26 PM, John Smith wrote: John Smith confessed once that he sleeps with a side arm under his pillow! Hey, in the military I learned to sleep with my weapon ... now that the streets of America are becoming a war zone with the aware population squaring off against the criminals, I'd suggest it to everyone! Not my rifle, but with my gun. This is my weapon, this is my gun, the first is for fighting, the second for fun ... Regards, JS |
Building a new shortwave tube radio
On Nov 15, 9:31*am, Lord Valve wrote:
wrote: On Nov 14, 9:59 am, Lord Valve wrote: John Smith wrote: On 11/13/2011 2:19 PM, Lord Valve wrote: John Smith wrote: On 11/13/2011 10:25 AM, Lord Valve wrote: Don Pearce wrote: On Sun, 13 Nov 2011 08:38:28 -0700, Lord Valve * wrote: dave wrote: On Sun, 13 Nov 2011 11:39:03 +0000, Geoffrey S. Mendelson wrote: It is much more important to know exactly how long and how well your satellite is going to work than to hope to get longer by using a technology that might last longer, but will more probably die unexpectedly when struck by a cosmic ray burst. Sometimes you can not predict how long a satellite will be used. A friend of mine worked on a civilian satellite for a defense contractor and just before the division was sold off, cleaned out any old documents and files they had on it. Since the satellite he had worked on was way past its expected life (but still in use), the contracts had long expired, the work was not classified and a new improved one was due to be launched in a few days, he was told to dump it all. A few days later, the booster exploded on the pad, and the replacement was destroyed. The sattelite was kept running for many years, although there were no documents on what to do or how it was built. Geoff. What good is a diagram if the unit is 24,000 miles in the air? It had better *not* be in the air... *;-) Besides - I saw mention upthread of using the ambient vacuum with just the tube elements, rather than a typical evacuated glass (or other material) enclosure...is the vacuum in geosynchronous orbit really hard enough? It would seem to me that there are probably plenty of gas molecules floating around at that height, even if it would still qualify as a "soft" vacuum. *Anybody? Lord Valve For all sorts of other reasons, standard enclosed tubes are used. Main reasons are first to contain the electrons so other metalwork doesn't get involved, and second to maintain the correct physical positioning. The helix is of very fine tolerance in both pitch and positioning. Space is certainly hard enough, but the environment around a satellite is frequently not space, but a diffuse cloud of exhaust gas which would extinguish a TWT immediately. d Ah. Good point! Satellites do indeed need to use propellant of some sort to keep in position; I didn't think of that at all. *And it would seem that even if the ambient vacuum were hard enough, conventional construction of the TWT would be needed to keep contaminants out of it during the satellite assembly process down on Terra firma. But I must admit, the idea of using ambient vacuum tickles my fancy a bit. *;-) Lord Valve I don't recall anyone ever claiming there was no enclose on the devices ... just the reasons for enclosing them the way we do on earth is now gone ... Regards, JS Do you actually read this ****, or have you been into the medicine cabinet? Lord Valve shrug I usually don't read imbecilic stuff ... such as yours. *But, if I do, I certainly do not take it seriously ... perhaps you will have better luck with others. Regards, JS Oh. So, you're just another garden-variety ****. *shrug Y'all have a Real Nice Day now, y'heah? Got guns? Lord Valve American - so far- Hide quoted text - - Show quoted text - John Smith confessed once *that he sleeps with a side arm under his pillow! He can't keep it on the nightstand like everyone else? You don't want a pistol in the sack with you...you might blow your balls off by accident. *Although, in his case... Got guns? Lord Valve American - so far- Hide quoted text - - Show quoted text - I'll prempt the probability that LV will call me a **** and say to all, respectfully as any gentleman can, that when I am a ****, I know it, and so LV needn't tell me about it. Is LV getting WORSE as he's gettin older? wer'e into about 3 posts from him with the firstie dissing JS for imbecilic reasons, during a detailed discussion regarding 10,993.5 ways of building a radio and including side issues of tubes used in satellites. Innocent stuff. And who'd have guessed so many would have sprung from the woodwork to discuss tubey radio thingies when most ppl here thought only 3 people read r.a.t most days? Anyway, then after such brevity from LV, we get stuff about guns, and being American. I reckon LV is frightened witless about the world outside himself. I invite him to calm down, nobody is about to force him to be un- american, and probably nobody would find it interesting to do a home invasion at LV's house. Surely both activities would be boring, no? Fat lotta good it does to have a shooter under the pillow when ya snoring ya head off while someone steps out the window with the family silver. Well, plasma TV set maybe. But lemme tell ya, one does sure wake up fast when ya reach fo the gun while half asleep and ya shoot ya ****ing dick off. Dozen madder; being dickless at 60 yo probably improves a man. But such an event does has ya thinkin fast about a doctor - **** the TV set, let 'em have the darn thang. Funny thing, I never had no need to ever even consider gettin a gun. Jus' no need. There's no need for a front fence, and no need for any dog. There used ta be a shiela livin 5 doors away down my street who used to have a couple of those horrible little yappie terriers. Story was that some bloke got slightly too amarous with her when she was 17, about 20 years before and she never got over it. She had one of those figures and a face that had blokes jus thinkin only one thing, but she just couldn't handle any man's advance. Anyway, kids round our way would chuck small rocks at her house windows whenever they walked past, and this set off the dogs, and that'd set off her neighbours, and they'd harrange the poor bitch about her 2 noisy dogs and all dogs and humans involved took an hour to calm down. Comical it was. Anyway, she musta moved because we don't cop the yap-yap or the argy-bargy neighbours any more. Lucky it was that nobody had a gun, and that nobody shot anyone, deliberately, or by mistake. Such is life in Austrayan suburbs, where of course there are always a few ppl who have gorn astray, as ppl do, but remarkably, there is very little blood on the footpaths. Patrick Turner. |
Building a new shortwave tube radio
Patrick Turner wrote:
On Nov 15, 9:31 am, Lord Valve wrote: wrote: On Nov 14, 9:59 am, Lord Valve wrote: John Smith wrote: On 11/13/2011 2:19 PM, Lord Valve wrote: John Smith wrote: On 11/13/2011 10:25 AM, Lord Valve wrote: Don Pearce wrote: On Sun, 13 Nov 2011 08:38:28 -0700, Lord Valve wrote: dave wrote: On Sun, 13 Nov 2011 11:39:03 +0000, Geoffrey S. Mendelson wrote: It is much more important to know exactly how long and how well your satellite is going to work than to hope to get longer by using a technology that might last longer, but will more probably die unexpectedly when struck by a cosmic ray burst. Sometimes you can not predict how long a satellite will be used. A friend of mine worked on a civilian satellite for a defense contractor and just before the division was sold off, cleaned out any old documents and files they had on it. Since the satellite he had worked on was way past its expected life (but still in use), the contracts had long expired, the work was not classified and a new improved one was due to be launched in a few days, he was told to dump it all. A few days later, the booster exploded on the pad, and the replacement was destroyed. The sattelite was kept running for many years, although there were no documents on what to do or how it was built. Geoff. What good is a diagram if the unit is 24,000 miles in the air? It had better *not* be in the air... ;-) Besides - I saw mention upthread of using the ambient vacuum with just the tube elements, rather than a typical evacuated glass (or other material) enclosure...is the vacuum in geosynchronous orbit really hard enough? It would seem to me that there are probably plenty of gas molecules floating around at that height, even if it would still qualify as a "soft" vacuum. Anybody? Lord Valve For all sorts of other reasons, standard enclosed tubes are used. Main reasons are first to contain the electrons so other metalwork doesn't get involved, and second to maintain the correct physical positioning. The helix is of very fine tolerance in both pitch and positioning. Space is certainly hard enough, but the environment around a satellite is frequently not space, but a diffuse cloud of exhaust gas which would extinguish a TWT immediately. d Ah. Good point! Satellites do indeed need to use propellant of some sort to keep in position; I didn't think of that at all. And it would seem that even if the ambient vacuum were hard enough, conventional construction of the TWT would be needed to keep contaminants out of it during the satellite assembly process down on Terra firma. But I must admit, the idea of using ambient vacuum tickles my fancy a bit. ;-) Lord Valve I don't recall anyone ever claiming there was no enclose on the devices ... just the reasons for enclosing them the way we do on earth is now gone ... Regards, JS Do you actually read this ****, or have you been into the medicine cabinet? Lord Valve shrug I usually don't read imbecilic stuff ... such as yours. But, if I do, I certainly do not take it seriously ... perhaps you will have better luck with others. Regards, JS Oh. So, you're just another garden-variety ****. shrug Y'all have a Real Nice Day now, y'heah? Got guns? Lord Valve American - so far- Hide quoted text - - Show quoted text - John Smith confessed once that he sleeps with a side arm under his pillow! He can't keep it on the nightstand like everyone else? You don't want a pistol in the sack with you...you might blow your balls off by accident. Although, in his case... Got guns? Lord Valve American - so far- Hide quoted text - - Show quoted text - I'll prempt the probability that LV will call me a **** and say to all, respectfully as any gentleman can, that when I am a ****, I know it, and so LV needn't tell me about it. Is LV getting WORSE as he's gettin older? wer'e into about 3 posts from him with the firstie dissing JS for imbecilic reasons, during a detailed discussion regarding 10,993.5 ways of building a radio and including side issues of tubes used in satellites. Innocent stuff. And who'd have guessed so many would have sprung from the woodwork to discuss tubey radio thingies when most ppl here thought only 3 people read r.a.t most days? Anyway, then after such brevity from LV, we get stuff about guns, and being American. I reckon LV is frightened witless about the world outside himself. I invite him to calm down, nobody is about to force him to be un- american, and probably nobody would find it interesting to do a home invasion at LV's house. Surely both activities would be boring, no? Fat lotta good it does to have a shooter under the pillow when ya snoring ya head off while someone steps out the window with the family silver. Well, plasma TV set maybe. But lemme tell ya, one does sure wake up fast when ya reach fo the gun while half asleep and ya shoot ya ****ing dick off. Dozen madder; being dickless at 60 yo probably improves a man. But such an event does has ya thinkin fast about a doctor - **** the TV set, let 'em have the darn thang. Funny thing, I never had no need to ever even consider gettin a gun. Jus' no need. There's no need for a front fence, and no need for any dog. There used ta be a shiela livin 5 doors away down my street who used to have a couple of those horrible little yappie terriers. Story was that some bloke got slightly too amarous with her when she was 17, about 20 years before and she never got over it. She had one of those figures and a face that had blokes jus thinkin only one thing, but she just couldn't handle any man's advance. Anyway, kids round our way would chuck small rocks at her house windows whenever they walked past, and this set off the dogs, and that'd set off her neighbours, and they'd harrange the poor bitch about her 2 noisy dogs and all dogs and humans involved took an hour to calm down. Comical it was. Anyway, she musta moved because we don't cop the yap-yap or the argy-bargy neighbours any more. Lucky it was that nobody had a gun, and that nobody shot anyone, deliberately, or by mistake. Such is life in Austrayan suburbs, where of course there are always a few ppl who have gorn astray, as ppl do, but remarkably, there is very little blood on the footpaths. Patrick Turner. Well, I.... **** it, it's too complicated to explain. Hit the archives if you're interested. I haven't shot anyone so far, and I'm not planning on it. However, they day ain't over... BTW, you're a ****. I mean that in the nicest possible way, of course; no more than the usual amount of offense is intended. Hopefully Mr. Jute is reading this, so my efforts won't go entirely unappreciated... Got guns? (See http://en.wikipedia.org/wiki/Got_Milk%3F ) Lord Valve American - so far (you figure it out) |
Building a new shortwave tube radio
Wow, I lit a loaded fart off here, didn't I?
First, I said use a Hallicrafters band switch and an Eddystone dial because there's probably a market for those with old Hallicrafterses with bad bandswitches and with regen builders respectively. The problem with the Hallicrafters band switch replacement market is that there are so many DIFFERENT ones, if they were all the same they'd be reproduced. Remember rotary switches are modular, to a degree, the company that makes them builds them out of mostly off the shelf parts, and in fact you CAN get new ones built, but the problem is that they cost more than the value of most hallicrafters radios, since they have to put them together as one offs. 500 units takes the price from $400 to $25-50 each. At twenty five bucks a shot you could sell a couple hundred in six months....IF you had a unit that went into enough popular radios. Eddystone dials are a similar thing. The market has to be a mix of nostalgia and survival mentality. Yes, a solid state radio can be made EMP proof, or highly resistant, but it takes some doing. As far as power in such a situation....In the old days they used car batteries for heater voltages and a stack of dry cells, a dynamotor or a vibra-pack for B+.. Look carefully at the old Collins and National sets. They developed it to something of a fine art. As an aside, any "survivalist" with half a brain has buried a couple of solid state complete radios as well as a pile of surplus semiconductors useful post-Blast in old ammo cans. A stash of common bipolar and FETs, silicon diodes, common chips for radios and whatnot, buried under ground could be more valuable than gold and at a hell of a lot lower current acquisition price today. Some discussion on which types would be interesting. I don't consider myself a survivalist but I have a couple of guns and some ammo buried along with a couple of full jerry cans of 100LL avgas (it doesn't go bad) and some electronic stuff, plus some garage sale Craftsman tools, some spools of wire from a motor shop (short ends), and a couple things I won't mention. Better safe than sorry I figure. |
Building a new shortwave tube radio
Australia got stupid with its gun laws when they let the 'sheilas'
vote. We got Prohibition under similar circumstances. Female suffrage was a great idea...NOT! |
Building a new shortwave tube radio
On Nov 16, 2:18*am, wrote:
*Wow, I lit a loaded fart off here, didn't I? *First, I said use a Hallicrafters band switch and an Eddystone dial because there's probably a market for those with old Hallicrafterses with bad bandswitches and with regen builders respectively. The problem with the Hallicrafters band switch replacement market is that there are so many DIFFERENT ones, if they were all the same they'd be reproduced. Remember rotary switches are modular, to a degree, the company that makes them builds them out of mostly off the shelf parts, and in fact you CAN get new ones built, but the problem is that they cost more than the value of most hallicrafters radios, since they have to put them together as one offs. 500 units takes the price from $400 to $25-50 each. At twenty five bucks a shot you could sell a couple hundred in six months....IF you had a unit that went into enough popular radios. *Eddystone dials are a similar thing. *The market has to be a mix of nostalgia and survival mentality. Yes, a solid state radio can be made EMP proof, or highly resistant, but it takes some doing. *As far as power in such a situation....In the old days they used car batteries for heater voltages and a stack of dry cells, a dynamotor or a vibra-pack for B+.. *Look carefully at the old Collins and National sets. They developed it to something of a fine art. *As an aside, any "survivalist" with half a brain has buried a couple of solid state complete radios as well as a pile of surplus semiconductors useful post-Blast in old ammo cans. A stash of common bipolar and FETs, silicon diodes, common chips for radios and whatnot, buried under ground could be more valuable than gold and at a hell of a lot lower current acquisition price today. *Some discussion on which types would be interesting. *I don't consider myself a survivalist but I have a couple of guns and some ammo buried along with a couple of full jerry cans of 100LL avgas (it doesn't go bad) and some electronic stuff, plus some garage sale Craftsman tools, *some spools of wire from a motor shop (short ends), and a couple things I won't mention. Better safe than sorry I figure. ....so all this taken into consideration ... How much will this NEW TUBED RADIO cost to build ? Ten -to-fifteen grand ?? Or a hell of a lot more than that ??? |
Building a new shortwave tube radio
On 11/15/11 19:05 , flipper wrote:
On Fri, 11 Nov 2011 10:45:09 -0600, "D. Peter Maus" wrote: On 11/11/11 08:42 , Lord Valve wrote: If you are paranoid, you an even find stores in many places where you can buy a refurbished radio for cash and leave a fake name and address. Huh? Where are you posting from? Why would anyone need to leave his name and address - fake or otherwise - when purchasing a radio? Because cash transactions are coming under the scrutiny of authority, today. Louisiana just became the most recent state to require identity of purchaser in a cash transaction or a ban on the cash transaction. Even a used purchase from a flea market or a garage sale. You need to be more cautious and critical of Internet and media hype. And you need to make sure you're not talking to someone getting his information first hand from the legislators voting on the bill. It does not apply to non profits, flea markets, garage sales, persons solely engaged in the business of buying, selling, trading in, or otherwise acquiring or disposing of motor vehicles and used parts of motor vehicles, or wreckers or dismantlers of motor vehicles, dealers in coins and currency, dealers in antiques, gun and knife shows or other trade and hobby shows, and, well, anyone who isn't a "secondhand dealer" Actually, these are specifically what the law is intended to address. |
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