View Full Version : Using CRT to keep lunch warm
kf6myv
10-18-2006, 04:50 AM
I occasionaly wrap up a food item and when I get to work place it on top of the CRT monitor. When I unwrap it there is usually one area where the tin foil is a tad grayish. Is the foil changing somehow do to that little amount of heat or is it something else http://www.qrz.com/iB_html/non-cgi/emoticons/rock.gif
Stupid I know but saw it again today had to ask. Probably poisoning myself http://www.qrz.com/iB_html/non-cgi/emoticons/wow.gif
I guess I have seen hot foil before and it does color a bit but the CRT is rather low on the heat.
If you rub your finger along the discoloration does it come off? Best guess is that the aluminum foil is being oxidized or metal-sputtered through the vents of the CRT.
As an aside, I used to wrap hot dogs, soup cans, whatever, in aluminum foil and stick it in the engine compartment of my old VW Bug; 20 minutes of driving and I had piping hot food...though one time a can of chicken noodle soup exploded back there. Try explaining to the mechanic servicing your engine that one!
wb7dmx
10-18-2006, 05:24 AM
right, I remember hearing stories of people wrapping a full meal in foil and putting it on the manafold and soon have a full roast pork dinner with potatoes and veges.
W4ETE
10-18-2006, 05:26 AM
In the Army, I used to warm my meals on the heater ducts in my tracked vehicles during the winter... In the desert, I just put the meals on top of the vehicles.
Quote[/b] (kf6myv @ Oct. 16 2006,22:50)]Stupid I know but saw it again today had to ask. Probably poisoning myself #http://www.qrz.com/iB_html/non-cgi/emoticons/wow.gif
Best use of this smiley to date! KUDOS! We have actually used barrel covers on the injection units of injection molding machines as warmers for lunch in years gone by. With a large variety of presses and a wide range of material processed, you can usually find one that would even satisfy Goldie Locks for that 'just right' warmth.
KI4PEQ
10-18-2006, 06:36 AM
No one warms their dinner on a transmitter anymore? Or a dummy load?
K8MHZ
10-18-2006, 01:42 PM
Is the picture on your CRT getting any dimmer? You could be leaking pixels and they are collecting on the metal foil.
Don't throw them out! If your scanner ever runs out of pixels you will be glad you kept them.
n1ydx
10-18-2006, 02:29 PM
Howdy,
Previously in the army we had two teletype machines go bad.
Maintenance found grilled ham and cheese sandwiches on the motors and the cheese leaked into the motors.
Try explaining that to procurement office.
N1YDX - Sarge
kf6myv
10-18-2006, 02:41 PM
Usually on the inside. I have one cookn now I'll have to check it when I open it up.
kl7aj
10-18-2006, 03:14 PM
Quote[/b] (kf6myv @ Oct. 17 2006,21:50)]I occasionaly wrap up a food item and when I get to work place it on top of the CRT monitor. When I unwrap it there is usually one area where the tin foil is a tad grayish. Is the foil changing somehow do to that little amount of heat or is it something else #http://www.qrz.com/iB_html/non-cgi/emoticons/rock.gif
Stupid I know but saw it again today had to ask. Probably poisoning myself #http://www.qrz.com/iB_html/non-cgi/emoticons/wow.gif
I guess I have seen hot foil before and it does color a bit but the CRT is rather low on the heat.
It's nuclear radiation from the plutonium used in the CRT.
kl7aj
10-18-2006, 03:16 PM
Quote[/b] (ku4my @ Oct. 17 2006,22:36)]Quote[/b] (kf6myv @ Oct. 16 2006,22:50)]Stupid I know but saw it again today had to ask. Probably poisoning myself #http://www.qrz.com/iB_html/non-cgi/emoticons/wow.gif
Best use of this smiley to date! KUDOS! We have actually used barrel covers on the injection units of injection molding machines as warmers for lunch in years gone by. With a large variety of presses and a wide range of material processed, you can usually find one that would even satisfy Goldie Locks for that 'just right' warmth.
My dad was on a seagoing tug in WWII, and they always kept a pot of coffee on the engine manifold. Learnt how to drink hisself some real strong coffee.. http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif
eric
http://www.msnbc.msn.com/id/14174161/
WA5VQM
10-18-2006, 05:18 PM
Probably dust particles that were ionized from the high voltage in the CRT driver circuit.
W4HAY
10-18-2006, 08:30 PM
It's the same thing that happens when you cover food with aluminum foil in the oven -- acids in the food oxidize the foil.
w2amr
10-18-2006, 10:25 PM
Quote[/b] (KI4PEQ @ Oct. 17 2006,23:36)]No one warms their dinner on a transmitter anymore? Or a dummy load?
You can on my transmitters.
n2ize
10-18-2006, 10:39 PM
Quote[/b] (KI4PEQ @ Oct. 17 2006,23:36)]No one warms their dinner on a transmitter anymore? Or a dummy load?
Why not ?? I still do. Enough heat blowing out the top of the Globe King 500
to keep a hot sandwich nice and warm.
w2amr
10-18-2006, 10:46 PM
Quote[/b] (n2ize @ Oct. 18 2006,15:39)]Quote[/b] (KI4PEQ @ Oct. 17 2006,23:36)]No one warms their dinner on a transmitter anymore? Or a dummy load?
Why not ?? I still do. #Enough heat blowing out the top of the Globe King 500
to keep a hot sandwich nice and warm.
Don't tell me you finally got that thing up and running?
KI4PEQ
10-18-2006, 11:34 PM
Quote[/b] (n1ydx @ Oct. 18 2006,09:29)]Howdy,
Previously in the army we had two teletype machines go bad.
Maintenance found grilled ham and cheese sandwiches on the motors and the cheese leaked into the motors.
Try explaining that to procurement office.
N1YDX - Sarge
Some of the message traffic was so cheesy that it melted onto the motors? http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif
n2ize
10-18-2006, 11:54 PM
Quote[/b] (w2amr @ Oct. 18 2006,15:46)]Quote[/b] (n2ize @ Oct. 18 2006,15:39)]Quote[/b] (KI4PEQ @ Oct. 17 2006,23:36)]No one warms their dinner on a transmitter anymore? Or a dummy load?
Why not ?? I still do. Enough heat blowing out the top of the Globe King 500
to keep a hot sandwich nice and warm.
Don't tell me you finally got that thing up and running?
Oh yeah, it runs. Loaded it into the antenna just fine. Then I ran some audio into it while I had it loaded into a dummy load. Piss weak audio though as I didn't have much in the way of a modulator going . I need a pair of 572B's and a nice piece of modulation iron. I do have some 811A's and a peice of iron thatis barely big enough but that combo will just about barely cut it. Oh well, better something than nothing. The Viking 2 is fine and I just started digging into the Valiant again.
w2amr
10-19-2006, 08:13 AM
Quote[/b] (n2ize @ Oct. 18 2006,16:54)]Quote[/b] (w2amr @ Oct. 18 2006,15:46)]Quote[/b] (n2ize @ Oct. 18 2006,15:39)]Quote[/b] (KI4PEQ @ Oct. 17 2006,23:36)]No one warms their dinner on a transmitter anymore? Or a dummy load?
Why not ?? I still do. #Enough heat blowing out the top of the Globe King 500
to keep a hot sandwich nice and warm.
Don't tell me you finally got that thing up and running?
Oh yeah, it runs. Loaded it #into the antenna just fine. Then I ran some audio into it while #I had it loaded into a #dummy load. Piss weak #audio though as I didn't have much in the way of a modulator going . #I need a pair of 572B's and a #nice piece of #modulation iron. I do #have some #811A's and a peice of iron thatis barely #big enough but that #combo will just about barely cut it. Oh well, better something than nothing. #The Viking 2 is fine and I just started digging into the Valiant again.
I think #572B's are overkill, the 811's should work fine with the right mod iron. I am running 811's in my 500.
n2ize
10-19-2006, 10:20 AM
572B's would probably give me more breathing room and some more ooomph. . But 811A's will work fine and I'll probably use them to get things underway.
w2amr
10-19-2006, 10:27 AM
Quote[/b] (n2ize @ Oct. 19 2006,03:20)]572B's would probably give me more breathing room and some more ooomph. . But 811A's will work fine and I'll probably use them to get things underway.
And the 811's are a lot cheaper
n2ize
10-19-2006, 10:42 AM
Quote[/b] (w2amr @ Oct. 19 2006,03:27)]Quote[/b] (n2ize @ Oct. 19 2006,03:20)]572B's would probably give me more breathing room and some more ooomph. . But 811A's will work fine and I'll probably use them to get things underway.
And the 811's are a lot cheaper
Very true. Plus I have a pair of 811's on hand right now.
w2amr
10-19-2006, 10:43 AM
Quote[/b] (n2ize @ Oct. 19 2006,03:42)]Quote[/b] (w2amr @ Oct. 19 2006,03:27)]Quote[/b] (n2ize @ Oct. 19 2006,03:20)]572B's would probably give me more breathing room and some more ooomph. . But 811A's will work fine and I'll probably use them to get things underway.
And the 811's are a lot cheaper
Very true. Plus I have a pair of 811's on hand right now.
What are you using for low level audio?
n2ize
10-19-2006, 10:56 AM
Quote[/b] (w2amr @ Oct. 19 2006,03:43)]Quote[/b] (n2ize @ Oct. 19 2006,03:42)]Quote[/b] (w2amr @ Oct. 19 2006,03:27)]Quote[/b] (n2ize @ Oct. 19 2006,03:20)]572B's would probably give me more breathing room and some more ooomph. . But 811A's will work fine and I'll probably use them to get things underway.
And the 811's are a lot cheaper
Very true. Plus I have a pair of 811's on hand right now.
What are you using for low level audio?
I'm still going to have to do some rewiring on the modulator deck so I'll probably use something similar to what was in there (but with a little more oomph). I won't really need a speech amp because I am getting enough amplification out of my extrernal audio chain so all I'll need is a audio driver.
kl7aj
10-19-2006, 03:04 PM
Quote[/b] (w2amr @ Oct. 19 2006,01:13)]Quote[/b] (n2ize @ Oct. 18 2006,16:54)]Quote[/b] (w2amr @ Oct. 18 2006,15:46)]Quote[/b] (n2ize @ Oct. 18 2006,15:39)]Quote[/b] (KI4PEQ @ Oct. 17 2006,23:36)]No one warms their dinner on a transmitter anymore? Or a dummy load?
Why not ?? I still do. #Enough heat blowing out the top of the Globe King 500
to keep a hot sandwich nice and warm.
Don't tell me you finally got that thing up and running?
Oh yeah, it runs. Loaded it #into the antenna just fine. Then I ran some audio into it while #I had it loaded into a #dummy load. Piss weak #audio though as I didn't have much in the way of a modulator going . #I need a pair of 572B's and a #nice piece of #modulation iron. I do #have some #811A's and a peice of iron thatis barely #big enough but that #combo will just about barely cut it. Oh well, better something than nothing. #The Viking 2 is fine and I just started digging into the Valiant again.
I think #572B's are overkill, the 811's should work fine with the right mod iron. I am running 811's in my 500.
Dang...when I think of all the modulation transformers I GAVE AWAY. http://www.qrz.com/iB_html/non-cgi/emoticons/sad.gif Well, at least they all ended up in nice homes....I think.
It may be cheating, but some of those toroidal power transformer cores actually make decent modulation iron. Of course, you don't get the nice "lamination rattle" that you do in a classic transformer. I realized it's not a real radio if you can't hear the laminations rattle, but it works in a pinch. http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif
eric
n2ize
10-19-2006, 05:29 PM
Quote[/b] (kl7aj @ Oct. 19 2006,08:04)]Quote[/b] (w2amr @ Oct. 19 2006,01:13)]Quote[/b] (n2ize @ Oct. 18 2006,16:54)]Quote[/b] (w2amr @ Oct. 18 2006,15:46)]Quote[/b] (n2ize @ Oct. 18 2006,15:39)]Quote[/b] (KI4PEQ @ Oct. 17 2006,23:36)]No one warms their dinner on a transmitter anymore? Or a dummy load?
Why not ?? I still do. Enough heat blowing out the top of the Globe King 500
to keep a hot sandwich nice and warm.
Don't tell me you finally got that thing up and running?
Oh yeah, it runs. Loaded it into the antenna just fine. Then I ran some audio into it while I had it loaded into a dummy load. Piss weak audio though as I didn't have much in the way of a modulator going . I need a pair of 572B's and a nice piece of modulation iron. I do have some 811A's and a peice of iron thatis barely big enough but that combo will just about barely cut it. Oh well, better something than nothing. The Viking 2 is fine and I just started digging into the Valiant again.
I think 572B's are overkill, the 811's should work fine with the right mod iron. I am running 811's in my 500.
Dang...when I think of all the modulation transformers I GAVE AWAY. http://www.qrz.com/iB_html/non-cgi/emoticons/sad.gif Well, at least they all ended up in nice homes....I think.
It may be cheating, but some of those toroidal power transformer cores actually make decent modulation iron. Of course, you don't get the nice "lamination rattle" that you do in a classic transformer. I realized it's not a real radio if you can't hear the laminations rattle, but it works in a pinch. http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif
eric
Good modulation xfmrs are hard to find these days. You can get them via Peter Dahl but you pay good money, especially if you need something to modulate the older 500W or Kilowatt plate rigs.
yep, I have heard of some guys getting some results using those toroidal cores. There's even one guy who reports that he has had good luck converting old TV power transformers into mod transformers. Supposedly it works quite well and can come in handy in a pinch where you're trying to salvage/restore an old 50 - 200 watt class plate rig (i.e. apache, valiant, etc.).
For me playing around with the old rigs is a way to escape the day to day grind of the modern solid state digital world.. http://www.qrz.com/iB_html/non-cgi/emoticons/biggrin.gif
Link TV to Mod Xfmr (http://amwindow.org/tech/htm/tvtomod.htm)
w2amr
10-19-2006, 09:05 PM
Quote[/b] (n2ize @ Oct. 19 2006,03:56)]Quote[/b] (w2amr @ Oct. 19 2006,03:43)]Quote[/b] (n2ize @ Oct. 19 2006,03:42)]Quote[/b] (w2amr @ Oct. 19 2006,03:27)]Quote[/b] (n2ize @ Oct. 19 2006,03:20)]572B's would probably give me more breathing room and some more ooomph. . But 811A's will work fine and I'll probably use them to get things underway.
And the 811's are a lot cheaper
Very true. Plus I have a pair of 811's on hand right now.
What are you using for low level audio?
I'm still going to have to do some rewiring on the modulator deck #so I'll probably use #something similar #to what was in there (but with a little more oomph). I won't really need a speech amp because I am getting enough amplification out of my extrernal audio chain so #all I'll need is a audio driver.
Cool, I can't wait to hear it.
w2amr
10-19-2006, 10:43 PM
Quote[/b] (n2ize @ Oct. 19 2006,03:56)]Quote[/b] (w2amr @ Oct. 19 2006,03:43)]Quote[/b] (n2ize @ Oct. 19 2006,03:42)]Quote[/b] (w2amr @ Oct. 19 2006,03:27)]Quote[/b] (n2ize @ Oct. 19 2006,03:20)]572B's would probably give me more breathing room and some more ooomph. . But 811A's will work fine and I'll probably use them to get things underway.
And the 811's are a lot cheaper
Very true. Plus I have a pair of 811's on hand right now.
What are you using for low level audio?
I'm still going to have to do some rewiring on the modulator deck #so I'll probably use #something similar #to what was in there (but with a little more oomph). I won't really need a speech amp because I am getting enough amplification out of my extrernal audio chain so #all I'll need is a audio driver.
Just out of curiosity I checked RF Parts and the prices for 572b's isn't all that bad.
link (http://www.rfparts.com/572bprices.html)
kf6myv
10-20-2006, 03:36 PM
Well last two attempts didnt have any discoloring. I'll go w/ the oxidizing affect though.
Cookies on dash from that link, nice! And look she only has two eyes http://www.qrz.com/iB_html/non-cgi/emoticons/wow.gif
Globe King 500! http://www.qrz.com/iB_html/non-cgi/emoticons/biggrin.gif Here is a nice site I am sure you have all seen http://home.att.net/~wa5cmi/gk500.htm I would love to have one of those babies.
Look at my details. I coulda fired up a serious lunch w/ that shelter if I still had it.