**GRUMPY**
Administrator/The Boss 
Classic Radio Operator Olde Timer 8220 [/color][/center]
"The King of Ping"
Posts: 4,342
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Post by **GRUMPY** on Jun 7, 2008 10:25:17 GMT -5
It's already 91 degrees here and it isn't even noon yet  We're in for a long four days here with temperatures in the mid to upper 90's and high humidity 
My wife and daughter leave for the beach in the morning until Wednesday, while I stay at home with the dogs 
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Sandbagger
Administrator/The Boss
Posts: 6,247 
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Post by Sandbagger on Jun 7, 2008 10:54:19 GMT -5
Right from winter to summer in a couple of weeks time...... And I'm fighting off a sinus infection and basically feel like dirt. So it looks like I'm hanging out with my best friend, the air conditioner..... |
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Post by hillbilly1987 on Jun 7, 2008 11:04:05 GMT -5
ya its geting hot here to guys and im still used to winter!!
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**GRUMPY**
Administrator/The Boss
Classic Radio Operator Olde Timer 8220 [/color][/center]
"The King of Ping"
Posts: 4,342
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Post by **GRUMPY** on Jun 7, 2008 13:56:28 GMT -5
100.6 at my place in the shade @ 2:50pm. In the sun it is 117.3 #medium-smiley-013#
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bolo
Ratchet Jaw
Posts: 63
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Post by bolo on Jun 7, 2008 14:32:32 GMT -5
Grumpy,
I think you have the right idea. Stay in the air conditioning. 95 degrees in Allentown.
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Post by Tinker53 on Jun 9, 2008 17:18:23 GMT -5
The workplace inside today was 90º, and that was it for me. I have A/C in my office, but I always seem to be needed out in the shop more. Of course, last Saturday the 7th, was my 2 meter antenna installation day. I started in the late morning and ended around 2:00pm. In the morning, the sun isn't on that side of the house so it was ok...sort of. But when finishing up, whew!!! That sun hit that spot and I was drenched. I almost jumped in the neighbor's pool! |
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Post by hillbilly1987 on Jun 9, 2008 17:31:30 GMT -5
The workplace inside today was 90º, and that was it for me. I have A/C in my office, but I always seem to be needed out in the shop more. Of course, last Saturday the 7th, was my 2 meter antenna installation day. I started in the late morning and ended around 2:00pm. In the morning, the sun isn't on that side of the house so it was ok...sort of. But when finishing up, whew!!! That sun hit that spot and I was drenched. I almost jumped in the neighbor's pool! hahaha thats funny |
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**GRUMPY**
Administrator/The Boss
Classic Radio Operator Olde Timer 8220 [/color][/center]
"The King of Ping"
Posts: 4,342
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Post by **GRUMPY** on Jun 10, 2008 18:27:08 GMT -5
We're getting blasted with storms here for the past two hours. Heavy T-Storms, winds to 56mph and hail the size of golf balls. The temp got to 99 here today, it is down to 72 right now and more storms are on the way 
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Post by Tinker53 on Jun 10, 2008 21:53:14 GMT -5
We got slammed up here earlier. Lots of wind, hail, and noisy lightning. I was the dog's best friend..... ;D |
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Post by giboni on Jun 12, 2008 19:19:43 GMT -5
Yup its hot in Brooklyn have a giant 3 horse powered fan blowing.Keeps this tube and me Nice and cool He He. ;D   |
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Post by Night Ranger on Jun 12, 2008 21:03:32 GMT -5
Yup its hot in Brooklyn have a giant 3 horse powered fan blowing.Keeps this tube and me Nice and cool He He. ;D That looks like a 4-1000a. |
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Post by giboni on Jun 12, 2008 21:12:49 GMT -5
He He
Thats good! this tube is allegedly able to last for about 30 years.In fact can be run at 7500 plate voltage all day.So if one can get the Iron you are looking at about 4,000 watts output with a good driver.its cheap to.Like 150 to 250.Your electric bill will get high unless you have Three phase Iron and 3phase from the wall.
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Post by BionicChicken on Jun 12, 2008 22:26:46 GMT -5
I ran a 4-1000A pull from WRBC, AM station, in Jackson, Ms in an amp I had. Peter Dahl transformer, vacuum variables, vacuum relays, everything overkill. Had 6250 VDC on the plate at 2 amps continuous. Air socket, blower, chimney the whole works. I drove it with a SB 1000 Heathkit. The amp would key 600-2000 depending on drive and keep the 5K slug of a Bird 43 at 4500 all day and night. Running 220 vac with a 30 amp dedicated line, single phase. I hate I ever got rid of it. Something about the mercury contactor when you turned the HV on had a nice sound to it and with it being instant on to boot. I had it for several years and never saw the wattage drop and the last I heard about it the guy was still hammering on it with the same tube. They are tough.
BC
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Sandbagger
Administrator/The Boss
Posts: 6,247
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Post by Sandbagger on Jun 13, 2008 9:19:01 GMT -5
He He Thats good! this tube is allegedly able to last for about 30 years.In fact can be run at 7500 plate voltage all day.So if one can get the Iron you are looking at about 4,000 watts output with a good driver.its cheap to.Like 150 to 250.Your electric bill will get high unless you have Three phase Iron and 3phase from the wall. This has me confused. According to the spec sheet, a single 4-1000 is rated for a 6000 volt plate maximum (As a CW or FM class C amp 5500 volts if modulated). At that plate voltage, the maximum plate power output is given as 3400 watts. So how can one exceed factory specs by 25% and still expect a long service life? Also bear in mind that the rated power output is the peak power out. In AM service, the dead-key carrier power would have be divided by 4 (850 watts) for proper modulation headroom. The informal "rule of thumb" that we used to use is that whatever the number of the "big tube" was, you doubled that and that was what you could expect for peak power out (3-500z=1000 watts PEP, 4-1000=2000 watts PEP etc.) This almost reminds me of those claims of "400 watts" from a 2SC-2879......... |
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Post by giboni on Jun 13, 2008 10:51:41 GMT -5
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Post by Tinker53 on Jun 13, 2008 11:59:31 GMT -5
That's a tube?  ? Geeez.....with those coily things in there, it looks more like a still.....  ;D har, har.... Well, at least now I know what that glowing light is across the Hudson! ;D  |
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Post by Night Ranger on Jun 13, 2008 14:29:36 GMT -5
The informal "rule of thumb" that we used to use is that whatever the number of the "big tube" was, you doubled that and that was what you could expect for peak power out (3-500z=1000 watts PEP, 4-1000=2000 watts PEP etc.) This almost reminds me of those claims of "400 watts" from a 2SC-2879......... The plate dissipation verses output depends on class of service as well. Seems like I remember the 4-1000a being rated at about 3000 watts plus in class AB1 grid driven service in one of my ARRL Radio Amateur handbooks. RFParts shows 6000 plate volts with .7 amps plate current gives 3400 watts out RMS. The RFParts data matches the datasheet values for maximum values. www.rfparts.com/tubespecs.htmland here is the datasheet. www.g8wrb.org/data/Amperex/4-1000A.pdfIn GG class B service the drive is about 130 watts in for about 1300 watts out if I remember correctly. I think the plate voltage listed in the ARRL handbook was around 3000 volts for GG. |
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Post by BionicChicken on Jun 13, 2008 20:58:03 GMT -5
That's a nice amp. Very nice build. The only thing I see needed is a chimney on the tube. Kudos' to whoever built it....they did a great job. It is something you should be proud of to own.
BC
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Post by giboni on Jun 27, 2008 23:10:03 GMT -5
A person like myself is not likely to be around in thirty years unless they come up with some kind of rejuvenation treatment.The Main Transformer in this Unit has a few combinations of output taps and the circuit after it handles the higher voltage.So what if I burn out out a tube in 3 year instead of thirty because I run it at 7,000 to 10,000 volts at the plate?I got six spares with this Beast.  ;DAll I need is a Lead Suit and I will be fine!  |
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We're in for a long four days here with temperatures in the mid to upper 90's and high humidity 
?
;D har, har....