- Blank RF Probe tips - 16 Updates
- Where to find schematic for XAM Model 200 amp? - 5 Updates
- Using magnets with tiny SMD devices - any electronic concerns? - 3 Updates
| oldschool@tubes.com: Mar 27 02:46PM -0500 Do any companies sell those blank RF probe tubes with metal tips? I recall back in the 60s you could buy the entire probes with internal parts as kits. They came with the same basic "shell" but had different internal parts for different uses. The parts inside of them are basic. Normally one diode and a resistor(s) or cap, or both. I've found the schematics for several different probes, and I know that some people build them in a pill bottle, or ink pen shell, or whatever, but I'd like to find some of the REAL shells if they are sold. Anyone know? Thanks |
| Foxs Mercantile <jdangus@att.net>: Mar 27 02:56PM -0500 > I've found the schematics for several different probes, and I know that > some people build them in a pill bottle, or ink pen shell, or whatever, > but I'd like to find some of the REAL shells if they are sold. Heathkit and Eico come to mind, but they haven't been sold in over 40 years. -- Jeff-1.0 wa6fwi http://www.foxsmercantile.com --- This email has been checked for viruses by AVG. http://www.avg.com |
| oldschool@tubes.com: Mar 27 03:07PM -0500 On Mon, 27 Mar 2017 14:56:06 -0500, Foxs Mercantile <jdangus@att.net> wrote: >> but I'd like to find some of the REAL shells if they are sold. >Heathkit and Eico come to mind, but they haven't been sold in over >40 years. Yep, those are the schematics I have, and maybe some popular electronics magazine articles as well. I know this new generation of fat lazy kids are too lazy to build kits, but probes are still used even on modern electronic test gear. I'm sure there are some technicians, experimenters and some older guys who still want to build a special needs probe, and need a plastic shell with tip to do so.... Someone must sell them.... |
| Foxs Mercantile <jdangus@att.net>: Mar 27 03:57PM -0500 > there are some technicians, experimenters and some older guys who still > want to build a special needs probe, and need a plastic shell with tip > to do so.... Someone must sell them.... Lets put a stop to this bullshit right now. There is no shortage of "Kids" (either in the classic teen bracket, or by you're implied definition of anyone else under 60) building kits. The kit companies of yesteryear and their kits aren't in business any more. The big thing now is Arduino, Instructables and the Makers. As much as you hate "Anything Chinese" the bottom line is you can't compete against them either. Heathkit is back and trying to sell kits again. Tell me why I should pay $149 for an transistorized AM radio. And after all your bellyaching about "I want tubes" I see you bought a used MAX Model 200. That has neither any vacuum tubes in it, nor was it manufactured in the US. Oh, and all the prices you remember? Multiply them by roughly ten for the value in today's currency. That $14 Heathkit something? $149 now. So quite playing Rip Van Winkle and bitching that it's not the '60s any more. -- Jeff-1.0 wa6fwi http://www.foxsmercantile.com --- This email has been checked for viruses by AVG. http://www.avg.com |
| oldschool@tubes.com: Mar 27 05:34PM -0500 On Mon, 27 Mar 2017 15:57:27 -0500, Foxs Mercantile <jdangus@att.net> wrote: >Lets put a stop to this bullshit right now. I asked a simple question, if you cant answer it, maybe someone else can. I only asked because I dont know much about what companies sell what. It's been years since I dealt with electronics companies other than radio shack. And yea, I like tube stuff, but I bought a XAM solid state amp. So what, that's my business, not yours.... It's a lot better than those crappy computer speakers. Regardless, I buy what I damn well please, and you dont have any decisions in what I buy or do. Nor do I really need your opinions. I asked if anyone knows if any stores sells blank probe tips, not for opinions of how to live my life, which is none of your damn business anyhow. I could spend a whole day googling for these probes, so I asked for some advice. If you cant answer a simple question, dont answer...... |
| Foxs Mercantile <jdangus@att.net>: Mar 27 06:00PM -0500 >> Lets put a stop to this bullshit right now. > I asked a simple question, if you cant answer it, maybe someone else > can. No, you didn't ask a simple question. You decided to bitch about fat lazy kids. Previously, you asked a simple question and you got an answer. Then you went off on one of your pointless rants bitching how things aren't like they used to be. And for the record, I don't give a shit what you do. But you come here asking for help, then you sit and bitch and argue about the help you get. -- Jeff-1.0 wa6fwi http://www.foxsmercantile.com --- This email has been checked for viruses by AVG. http://www.avg.com |
| Foxs Mercantile <jdangus@att.net>: Mar 27 07:10PM -0500 Here's two RF probe kits for about $15 each. <http://www.qrpkits.com/rfprobe.html> And <http://www.ebay.com/itm/142283510722> -- Jeff-1.0 wa6fwi http://www.foxsmercantile.com --- This email has been checked for viruses by AVG. http://www.avg.com |
| "pfjw@aol.com" <pfjw@aol.com>: Mar 27 05:21PM -0700 You are making it far too easy. A basic search found these and two other links to them. Give a man a fish.... Agreed on the BS factor however. When it is convenient to whine about China, let's whine. When it is convenient to use their products, go for it. XAM products were part of the initial foray in the race for the bottom. That $0.99 pair of underwear as it were. To mix a metaphor, the rest of the camel inevitably followed. And here we are. Peter Wieck Melrose Park, PA |
| oldschool@tubes.com: Mar 27 10:59PM -0500 On Mon, 27 Mar 2017 18:00:38 -0500, Foxs Mercantile <jdangus@att.net> wrote: >> can. >No, you didn't ask a simple question. You decided to bitch about fat >lazy kids. It's the truth, and I have a thing called "Freedom of speech"! >Previously, you asked a simple question and you got an answer. Then >you went off on one of your pointless rants bitching how things aren't >like they used to be. Things are what they are, that dont mean I have to like them.... >And for the record, I don't give a shit what you do. >But you come here asking for help, then you sit and bitch and argue >about the help you get. Here is some shopping advice for you. Quit buying your ties from China, they are too tight and they are cutting off the blood to your brain!!! |
| oldschool@tubes.com: Mar 27 11:30PM -0500 On Mon, 27 Mar 2017 17:21:00 -0700 (PDT), "pfjw@aol.com" <pfjw@aol.com> wrote: >d here we are. >Peter Wieck >Melrose Park, PA This XAM was made in Taiwan, which I know is darn near the same as China, but it was made around 1970, and made quite well. The entire case is metal, and well made. For my stereo, I like tube amps and want more power, but for a computer sound system, I just want to hear what is coming out of the computer. My laptop has practically no volume at all from it's internal speakers. Now I can actually hear it, and I am pleased with the sound. I spent almost twice what I paid for the XAM about a year ago, for some of the so called "computer speakers". They had poor sound, and they quit working after 7 months. My prior ones lasted maybe 2 years, and they had crappy sound too. Sure, I had the speakers that I am using on this XAM, but I know this system will outlast any of those cheap computer speakers and it's still small enough to haul around easily. When I saw it, I knew that is was what I was looking for. And it suits me well for the intended use. Not to mention it was cheap. Even without a schematic, I am sure I can fix it. Particularly since it has real power transistors for the output stage, not those damn ICs that usually can not be replaced, because they are not available. But I'd still like to have a schematic if I can locate one. |
| oldschool@tubes.com: Mar 28 12:56AM -0500 On Mon, 27 Mar 2017 19:10:24 -0500, Foxs Mercantile <jdangus@att.net> wrote: ><http://www.qrpkits.com/rfprobe.html> >And ><http://www.ebay.com/itm/142283510722> Now we're getting somewhere...... I particularly like the one from qrpkits. And at a good price. I downloaded the PDF for it, and it's very complete. I also browsed their other kits. Lots of interesting stuff.... Thank You! |
| "pfjw@aol.com" <pfjw@aol.com>: Mar 28 04:15AM -0700 XAM equipment of that vintage often (very nearly always) used germanium transistors - so be very careful of the part numbers. Peter Wieck Melrose Park, PA |
| Baron <baron@linuxmaniac.net>: Mar 28 03:31PM +0100 > guys who still want to build a special needs probe, and need a > plastic shell with tip > to do so.... Someone must sell them.... I used to make mine from copper and gas water pipe with Tuffnel plugs at the ends and copper nails for the tip. Nowadays I would heat shrink a cover on them. -- Best Regards: Baron. |
| Foxs Mercantile <jdangus@att.net>: Mar 28 10:25AM -0500 <http://www.ebay.com/itm/132140338092> -- Jeff-1.0 wa6fwi http://www.foxsmercantile.com --- This email has been checked for viruses by AVG. http://www.avg.com |
| analogdial <analogdial@mail.com>: Mar 28 04:13PM >>No, you didn't ask a simple question. You decided to bitch about fat >>lazy kids. > It's the truth, and I have a thing called "Freedom of speech"! It's always been true! Damn kids today!! "The children now love luxury. They have bad manners, contempt for authority; they show disrespect for elders and love chatter in place of exercise." attributed to -- Socretes!! I rembember being one of those damn kids back in the late 60s and early 70s. Promised myself to try not to grow up into a geezer. I suppose I'll be retiring one of these days. Maybe I'll make an attempt at Ardino programming or apps or something. Or maybe I'll just sit on the porch and yell "Get off my lawn!!". Sort of a coin toss. |
| analogdial <analogdial@mail.com>: Mar 28 04:24PM > but I'd like to find some of the REAL shells if they are sold. > Anyone know? > Thanks The probe in the old ARRL handbooks was in the sort of shield and socket used with 7 pin tubes. The pin connectors were removed from the socket and a long screw was installed through the center tube of the socket. All the RF probe parts were installed on a terminal strip which was held to the socket by the screw which also served as the tip of the probe. |
| "pfjw@aol.com" <pfjw@aol.com>: Mar 27 10:24AM -0700 ElectroVoice job-shopped for several house brands, including XAM. You may have luck pursuing that avenue. Peter Wieck Melrose Park, PA |
| Michael Black <et472@ncf.ca>: Mar 27 01:37PM -0400 |
| "pfjw@aol.com" <pfjw@aol.com>: Mar 27 10:49AM -0700 On Monday, March 27, 2017 at 1:29:31 PM UTC-4, Michael Black wrote: > "Xam" was a real product name? Sure was. EJ Korvette's An early, much smaller version of WalMart. Vornado was their appliance brand - which survived the demise of Korvette's. Peter Wieck Melrose Park, PA |
| oldschool@tubes.com: Mar 27 02:40PM -0500 On Mon, 27 Mar 2017 10:49:12 -0700 (PDT), "pfjw@aol.com" <pfjw@aol.com> wrote: >Vornado was their appliance brand - which survived the demise of Korvette's. >Peter Wieck >Melrose Park, PA I never heard of EJ Korvette's, but it appears that's the source of these amps according to what you guys replied. But yes, XAM was a real product name. (The story about Max the dog, backwards is interesting). The photo of this amp, which I posted the URL in the original message on here, shows what I have. It's a nice amp for what it is.... Nothing fancy, just a basic amp with decent sound. I am still wondering if Olson electronics may have sold them later on, I know most Olson stuff was closeouts from other companies. I loved Olson, it was a fun place with great deals. Either way, it looks like I will never find a schematic for this amp, but I thought I'd ask anyhow. |
| analogdial <analogdial@mail.com>: Mar 28 03:56PM > it was a fun place with great deals. > Either way, it looks like I will never find a schematic for this amp, > but I thought I'd ask anyhow. I don't think Olson ever sold XAM products. But I was leafing through an early 70s Olson catalog and I saw a Teledyne stereo which looked almost exactly like our old cheesy XAM stereo. The Teledyne sold for considerably more than the XAM, however. I seem to recall our XAM was made in Japan but it could have been Taiwan. Here's a few articles on EJ Korvette: http://pleasantfamilyshopping.blogspot.com/search/label/Korvettes |
| "pfjw@aol.com" <pfjw@aol.com>: Mar 27 12:27PM -0700 On Sunday, March 26, 2017 at 9:18:50 PM UTC-4, mike wrote: > Transients from turning the electromagnet on and off can create voltage > in nearby conductors. Sensitive inputs might not like that. Hall Effect > sensors might not like magnetism either. Good to raise the question - which deserves an answer that addresses it directly. Magnetic fields are largely dissipated when bridged. Which is why horseshoe magnets, as one obvious example are bridged when shipped. A bar between N & S., that is. DO try this at home. Take the typical cartoon-type horseshoe magnet and iron filings (in a bag for the purposes of neatness). With the bar and without the bar. When a magnetic parts-picker is holding its part, it is bridged. The electromotive coil is sitting between the two poles which are gapped at the proper size to pick up the part in question. The part-in-place dissipates extraneous fields, is demagnetized by the shifting field applied to it, and when the system shuts off (dropping the part) also absorbs and dissipates the transient - which ain't much nohow, anyway. Thank goodness for high-school science. We learned things as they apply to real life every single day. And a lot of cool stuff, too. Such as making gunpowder (elementary), gun cotton (nitrocellulose, not so easy) and much more. The teacher ran the course parallel to our history courses with a little bit of physics thrown in. So, we made "Egyptian Ice" in hot weather, a Rhodesian hoist, Prince Rupert's drops, Archimedes' screw (as well as displacement and specific gravity experiments, split rocks without tools, and much much more. Teaching that kind of science is probably a lost art - who would let little Jilly or Johnny around glacial sulphuric acid, much less the 'fixins' for gunpowder these days? But I can tell you exactly how a Lift Pump works, how it is different from a Force Pump, and its lifting limits. And we learned about the differences between the Atkinson cycle and the Otto cycle in 1967. As well as the ten (10) reindeer... How you can tell an American anywhere under any conditions... much longer, but related stories. The former is disclosable to the general public, the latter not - for obvious reasons. Peter Wieck Melrose Park, PA |
| Chris Jones <lugnut808@spam.yahoo.com>: Mar 28 10:52PM +1100 On 25/03/2017 02:30, N_Cook wrote: > while first solder dab. > Any devices a definite no-no for high local magnetism? , presumably some > SMD termination metal is not ferrous for one thing. Some RF ferrites probably wouldn't like it. I remember reading warnings about that. I doubt you would encounter those often. |
| Chris Jones <lugnut808@spam.yahoo.com>: Mar 28 11:37PM +1100 On 26/03/2017 05:55, N_Cook wrote: >> SMD termination metal is not ferrous for one thing. > While at it, any problems with fine chip geometries in cameras, fancy > phones and computers, passing through airport X-ray scanners? http://www.intersil.com/content/dam/Intersil/documents/an15/an1533.pdf |
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