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#11
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Safelight bulbs??
On 5/9/2009 2:42 PM K W Hart spake thus:
Will the series diode work with a compact fluorescent lamp? I think either the clipped sine wave or the decereased voltage might not let the bulb work Although the clipped sine wave might not be a problem.. *Please* don't top post. Won't work (well) with most CFLs. Should work OK with dimmable CFLs. By the way, it isn't a clipped sine wave; it's a half-wave rectified sine wave. "Murray" wrote in message ... A 1 amp diode in series with the bulb will reduce the wattage (but not by half). Try a 1N4004. 400V @ 1amp. About 10c or less. Murray Geoffrey S. Mendelson wrote: Richard Knoppow wrote: AKA Beehive lamp. Get the smallest wattage compact fluorescent lamp you can obtain and use some layers of plain writing paper over the filter or inside against the filter. The compact fluoresent lamps have some after glow but that should not be a problem for a safelight. I don't think they run hot enough to cause problems with the paper. Thanks, and to everyone who suggested something. I went to another lighting store today and found a bunch of GE 15 watt bulbs (made in Hungary).I bought six, so I am set for a long time. I'm still thinking about the other possibilites as I need more safelights, and I doubt that there more Beehive lamps around (here). -- Save the Planet Kill Yourself - motto of the Church of Euthanasia (http://www.churchofeuthanasia.org/) |
#12
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Safelight bulbs??
"Bob AZ" wrote in message ... The smallest incadescent bulbs that are still common here are 40 watt bulbs. What is everyone else doing for safelights? Thanks in advance, Geoff. Geoff bulbnam.com is your best friend for bulbs. Failing that send me some .jpgs of what you have and I am sure I have what you need. Bob AZ USA Shouldn't that be bulbman.com? |
#13
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Safelight bulbs??
Sorry, been away -late answer. The quick answer is 'NO'.
Fluoros work to a completely different system. That's why the usual dimmers warn against using them to control fluoros. Incandescent only. Get a fluoro specific dimmer. A diode actually extends the lifetime of a normal bulb. Murray K W Hart wrote: Will the series diode work with a compact fluorescent lamp? I think either the clipped sine wave or the decereased voltage might not let the bulb work Although the clipped sine wave might not be a problem.. "Murray" wrote in message ... A 1 amp diode in series with the bulb will reduce the wattage (but not by half). Try a 1N4004. 400V @ 1amp. About 10c or less. Murray Geoffrey S. Mendelson wrote: Richard Knoppow wrote: AKA Beehive lamp. Get the smallest wattage compact fluorescent lamp you can obtain and use some layers of plain writing paper over the filter or inside against the filter. The compact fluoresent lamps have some after glow but that should not be a problem for a safelight. I don't think they run hot enough to cause problems with the paper. Thanks, and to everyone who suggested something. I went to another lighting store today and found a bunch of GE 15 watt bulbs (made in Hungary).I bought six, so I am set for a long time. I'm still thinking about the other possibilites as I need more safelights, and I doubt that there more Beehive lamps around (here). Geoff. |
#14
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Safelight bulbs??
On 5/23/2009 7:24 AM Murray spake thus:
Sorry, been away -late answer. The quick answer is 'NO'. Fluoros work to a completely different system. That's why the usual dimmers warn against using them to control fluoros. Incandescent only. Get a fluoro specific dimmer. A diode actually extends the lifetime of a normal bulb. Actually, you got it a little backwards. No such thing as a "fluorescent-specific" dimmer. What you *can* get are dimmable fluorescents, that work with any dimmer. Please don't top-post. K W Hart wrote: Will the series diode work with a compact fluorescent lamp? I think either the clipped sine wave or the decereased voltage might not let the bulb work Although the clipped sine wave might not be a problem.. "Murray" wrote in message ... A 1 amp diode in series with the bulb will reduce the wattage (but not by half). Try a 1N4004. 400V @ 1amp. About 10c or less. Geoffrey S. Mendelson wrote: Richard Knoppow wrote: AKA Beehive lamp. Get the smallest wattage compact fluorescent lamp you can obtain and use some layers of plain writing paper over the filter or inside against the filter. The compact fluoresent lamps have some after glow but that should not be a problem for a safelight. I don't think they run hot enough to cause problems with the paper. Thanks, and to everyone who suggested something. I went to another lighting store today and found a bunch of GE 15 watt bulbs (made in Hungary).I bought six, so I am set for a long time. I'm still thinking about the other possibilites as I need more safelights, and I doubt that there more Beehive lamps around (here). -- Found--the gene that causes belief in genetic determinism |
#15
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Safelight bulbs??
I see your request not to top post - unfortunately my
program displays from the top, down, and I don't have to scroll all the way thru countless repetitions of previous postings to get to the actual new message. BTW - never seen dimmable fluoros here (Australia) only dimmers labeled as suitable for fluorescent lamps, But since I don't look all that often you are doubtless correct. Murray David Nebenzahl wrote: On 5/23/2009 7:24 AM Murray spake thus: Sorry, been away -late answer. The quick answer is 'NO'. Fluoros work to a completely different system. That's why the usual dimmers warn against using them to control fluoros. Incandescent only. Get a fluoro specific dimmer. A diode actually extends the lifetime of a normal bulb. Actually, you got it a little backwards. No such thing as a "fluorescent-specific" dimmer. What you *can* get are dimmable fluorescents, that work with any dimmer. Please don't top-post. K W Hart wrote: Will the series diode work with a compact fluorescent lamp? I think either the clipped sine wave or the decereased voltage might not let the bulb work Although the clipped sine wave might not be a problem.. "Murray" wrote in message ... A 1 amp diode in series with the bulb will reduce the wattage (but not by half). Try a 1N4004. 400V @ 1amp. About 10c or less. Geoffrey S. Mendelson wrote: Richard Knoppow wrote: AKA Beehive lamp. Get the smallest wattage compact fluorescent lamp you can obtain and use some layers of plain writing paper over the filter or inside against the filter. The compact fluoresent lamps have some after glow but that should not be a problem for a safelight. I don't think they run hot enough to cause problems with the paper. Thanks, and to everyone who suggested something. I went to another lighting store today and found a bunch of GE 15 watt bulbs (made in Hungary).I bought six, so I am set for a long time. I'm still thinking about the other possibilites as I need more safelights, and I doubt that there more Beehive lamps around (here). |
#16
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Safelight bulbs??
Murray wrote:
I see your request not to top post - unfortunately my program displays from the top, down, and I don't have to scroll all the way thru countless repetitions of previous postings to get to the actual new message. I am sorry things work out that way for you. There are two problems, and only one of them is yours. 1.) When responding, the responder should delete all unnecessary material from the post to which he is responding. Usually, retaining only the context needed to make the response understandable is enough. 2.) When responding, either respond at the bottom or, when appropriate, immediately after the part to which you are currently responding (when you are responding to several parts of the original message). -- .~. Jean-David Beyer Registered Linux User 85642. /V\ PGP-Key: 9A2FC99A Registered Machine 241939. /( )\ Shrewsbury, New Jersey http://counter.li.org ^^-^^ 09:15:01 up 65 days, 15:29, 3 users, load average: 4.09, 4.33, 4.31 |
#17
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Safelight bulbs??
"Jean-David Beyer" wrote
1.) When responding, the responder should delete all unnecessary material from the post to which he is responding. Usually, retaining only the context needed to make the response understandable is enough. If only they would.... Unfortunately, so many people will not snip the countless lines of old material, making top posting almost necessary. Those who vehemently condemn top-posting, claiming it's "against the rules," and citing "netiquette" and all that, should instead go after the many posters who leave 600 lines of old, already outdated and now irrelevant material from several different previous postings... and then respond with a two-liner. That's even worse. Having to scroll, scroll, scroll just to get to the next response is a real nuisance, thanks to those bottom posters who do it badly. Regardless of all that... ;-) I remember starting out printing b&w a million years ago at age 12 with the aid of a Kodak safelight that probably used 4w nightlight bulbs. The kit came with three large translucent domes of red, green, and orange. Printing my own stuff was fun. |
#18
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Safelight bulbs??
On 5/29/2009 12:01 PM Howard Lester spake thus:
"Jean-David Beyer" wrote 1.) When responding, the responder should delete all unnecessary material from the post to which he is responding. Usually, retaining only the context needed to make the response understandable is enough. If only they would.... Unfortunately, so many people will not snip the countless lines of old material, making top posting almost necessary. Those who vehemently condemn top-posting, claiming it's "against the rules," and citing "netiquette" and all that, should instead go after the many posters who leave 600 lines of old, already outdated and now irrelevant material from several different previous postings... and then respond with a two-liner. That's even worse. Having to scroll, scroll, scroll just to get to the next response is a real nuisance, thanks to those bottom posters who do it badly. That's still not any justification for top-posting. When I advise to bottom post, that *implicitly* includes trimming the text before posting. You'd thing that would go without saying, but as you say, too many idjits just blindly quote the entire damn previous message, sometimes adding only a line or two at the bottom. Like they say, it ain't rocket science ... -- Found--the gene that causes belief in genetic determinism |
#19
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Safelight bulbs??
Jean-David Beyer wrote:
: Murray wrote: : I see your request not to top post - unfortunately my : program displays from the top, down, and I don't have to : scroll all the way thru countless repetitions of : previous postings to get to the actual new message. : : I am sorry things work out that way for you. There are two problems, and : only one of them is yours. : 1.) When responding, the responder should delete all unnecessary material : from the post to which he is responding. Usually, retaining only the context : needed to make the response understandable is enough. : 2.) When responding, either respond at the bottom or, when appropriate, : immediately after the part to which you are currently responding (when you : are responding to several parts of the original message). These days I find that I prefer top posting to bottom posting. It makes threads easier to read. Back in the days before threaded newsreaders I admit it was easier to read a post when the reply was at the bottom. -- ------------------- Keep working millions on welfare depend on you |
#20
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Safelight bulbs??
Rebecca Ore wrote:
: In article : , : Murray wrote: : I see your request not to top post - unfortunately my : program displays from the top, down, and I don't have to : scroll all the way thru countless repetitions of : previous postings to get to the actual new message. : : Get a real newsreader and learn how to snip. You may try finding a newsreader capable of threading. Having to scroll to the bottom of a post to read the new content is a pain. It's much easier if the new content is on the top of the post. -- ------------------- Keep working millions on welfare depend on you |
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