- humming CFL - 7 Updates
- Make your own toobs! - 2 Updates
- 16 X 64 SCROLLING LED MATRIX - 1 Update
| micky <NONONOmisc07@bigfoot.com>: Jun 03 02:18PM -0400 In alt.home.repair, on Mon, 3 Jun 2019 06:15:07 -0400, Biff Tannen >> the hum? >Probably expensive but if the lievertising is to be believed, these might fix your problem. >https://www.geniecompany.com/garage-door-openers/accessories/led-light-bulb.aspx It's $19/2 of them, at Home Depot and Amazon, and Amazon has one for almost $10. Thanks. Expensive but a good idea. Bob, there's one other bulb in the package. I'll try that As I said, with the CFL the interference could be lessened by turing the radio off frequency a little**, but with the first LED bulb, I turned the tuning knob a half turn in each direction, from maybe 88 to 92 MHz FM. and the hum was the same everywhere, twice as loud as the sound had been. It's interesting that it interfered with FM reception, which is less vulnerable than AM, but it appeears, not invulnerable. **An advantage to analog tuning over digital tuning. |
| "Rod Speed" <rod.speed.aaa@gmail.com>: Jun 04 05:43AM +1000 "micky" <NONONOmisc07@bigfoot.com> wrote in message news:1moafep953ip7tia30stj7p433o793q735@4ax.com... > Bob, there's one other bulb in the package. I'll try that > As I said, with the CFL the interference could be lessened > by turing the radio off frequency a little**, That's because it was a relatively weak harmonic of the chopping frequency. > but with the first LED bulb, I turned the tuning knob a half turn in each > direction, from maybe 88 to 92 MHz FM. and the hum was the same > everywhere, twice as loud as the sound had been. That's because the designer was stupid enough to use a chopping frequency that's right in that band. > It's interesting that it interfered with FM reception, which is > less vulnerable than AM, but it appeears, not invulnerable. Yeah, particularly with that powerful a signal. |
| Peeler <troll@trap.invalid>: Jun 03 10:25PM +0200 On Tue, 4 Jun 2019 05:43:29 +1000, cantankerous trolling geezer Rodent Speed, the auto-contradicting senile sociopath, blabbered, again: >> It's interesting that it interfered with FM reception, which is >> less vulnerable than AM, but it appeears, not invulnerable. > Yeah, particularly with that powerful a signal. No shit, eh, senile wisenheimer? <tsk> -- FredXX to Rot Speed: "You are still an idiot and an embarrassment to your country. No wonder we shipped the likes of you out of the British Isles. Perhaps stupidity and criminality is inherited after all?" Message-ID: <plbf76$gfl$1@dont-email.me> |
| Bob F <bobnospam@gmail.com>: Jun 03 09:26PM -0700 On 6/3/2019 11:18 AM, micky wrote: > It's $19/2 of them, at Home Depot and Amazon, and Amazon has one for > almost $10. Thanks. Expensive but a good idea. > Bob, there's one other bulb in the package. I'll try that Another model or brand is more likely to make the needed difference. |
| devnull <devnull@127.0.0.1>: Jun 04 06:22AM -0400 On 6/4/19 12:26 AM, Bob F wrote: >> almost $10. Thanks. Expensive but a good idea. >> Bob, there's one other bulb in the package. I'll try that > Another model or brand is more likely to make the needed difference. Check with the local electric utility. Most have a free obamabulb program for libtard sponges. |
| Mark Lloyd <not@mail.invalid>: Jun 04 11:08AM -0500 On 6/3/19 1:18 PM, micky wrote: [snip] > been. It's interesting that it interfered with FM reception, which is > less vulnerable than AM, but it appeears, not invulnerable. > **An advantage to analog tuning over digital tuning. In the eighties I had an old TV (non cable ready). I found that by setting it to channel 7 and misadjusting the fine tuning, I could get channel 22 (cable midband, frequency just below that of ch. 7). BTW, you could get ch. 6 sound on an FM radio. -- Mark Lloyd http://notstupid.us/ "I refuse to be labeled immoral merely because I am godless." [Peter Walker on alt.atheism] |
| danny burstein <dannyb@panix.com>: Jun 04 04:13PM >setting it to channel 7 and misadjusting the fine tuning, I could get >channel 22 (cable midband, frequency just below that of ch. 7). >BTW, you could get ch. 6 sound on an FM radio. You still can (well, the analog channel 6). This is used, even today, by a bunch of "radio stations" (in quotes 'cuz, see below..) who are technically licensed as low power analog tv channel 6 (which is still allowed) but in reality are using that slot to give them a decent range audio/radio signal at 87.7 FM. Note that while the official FM (in the US) band starts a bit higher, most - especially those with tuning dials - will let you hear this one, too. Info on a typical station: https://en.wikipedia.org/wiki/WNYZ-LP -- _____________________________________________________ Knowledge may be power, but communications is the key dannyb@panix.com [to foil spammers, my address has been double rot-13 encoded] |
| jjhudak4@gmail.com: Jun 03 05:49PM -0700 On Sunday, June 2, 2019 at 7:48:36 PM UTC-4, Cursitor Doom wrote: > I didn't know people still do this... > https://www.youtube.com/watch?v=dRI0ZLTP6_0 Yes, they do...the fellow here is extremely talented...even produced curves for his tubes. https://www.youtube.com/watch?v=EzyXMEpq4qw I lived not very far from the Sylvania tube factory in Pennsylvania. Quite a few articles on the net about it and the physics and metallurgy that went into designing and fabricating high quality electron tubes. It was generally acknowledged that Sylvania tubes equaled or surpassed RCA tubes in quality and long-life. In a wild day dream one week I did quite a bit of searching of what it would take to create a high quality tube factory equal to what sylvania had. To actually put the equipment in place and the associated know how. It seemed to me that a lot of the 'art' (craftsmanship) has been lost and would need to be relearned, thus making a business endeavor extremely risky. It also seemed that some of the underlying physics/chemistry/metallurgy would have to be rediscovered. That put it out of my scope of knowledge. I can see an ad in IEEE spectrum: Wanted - electronics engineer/physicist experienced in electronic vacuum tube design and fabrication. Don't think I'd get many takers. Looks like will have to subsist on Russian and Chinese 'knock-offs'... Well, it was a nice dream... |
| Phil Allison <pallison49@gmail.com>: Jun 03 07:47PM -0700 > I can see an ad in IEEE spectrum: Wanted - electronics engineer/physicist experienced in electronic vacuum tube design and fabrication. Don't think I'd get many takers. > Looks like will have to subsist on Russian and Chinese 'knock-offs'... > Well, it was a nice dream... ** In the late 1970s when the Sylvania tube factory closed, the manufacturing equipment was offered at auction and the purchaser was Hartley Peavey of the Peavey Electronics Corporation - maker of thousands of tube guitar amps. His idea was to manufacture runs of tubes commonly used in audio amplifiers and sell them under his brand to other amp makers and the public. Then the Soviet Union collapsed, as predicted by Ronald Reagan, making Russian tubes available to the rest of the world at prices lower than the cost of production in the USA. Many of these were near identical to popular RCA and GE types or were easily enough adapted to match them in term of pin out etc. The Chinese had already bought up machinery from Europe and were making similar tubes of very ordinary quality at low prices too. AFAIK the Sylvania machinery is sitting in storage somewhere in the US. The Russians had always been making tubes of good quality for home and military consumption so the engineering knowledge was in place while the Chinese OTOH had a bit of learning to do. .... Phil |
| fynnashba@gmail.com: Jun 03 04:41PM -0700 > I have an arduino mega 2560 and wants to use it to drive a 16x64 LED array but the outputs are not enough, Is there any way i can achieve this? Thank you. Thank you everyone, I am going to try all ya suggestions |
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