Re: SX-62 Part Needed
Hello. I am in need of a mechanical part for my SX-62B. The dial pointer travels on it and the whole unit moves side to side to allow for the dial pointer reset. Mine is pictured below and as you can
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Markus Thomerson K5UFO DRO3
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#31542
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Edited
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Re: Ballast Resistors? Source?
I take the point about the wattage. I will go to a 10W resistor in the appropriate resistance.
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Richard Oscoda
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#31541
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Re: Ballast Resistors? Source?
If Jim is right about R-68 {I have not looked at the circuit} we should be worried about R68 wattage. As Jim says. A related thing; when these were produced, what was the rated temperature rise and
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don Root
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#31540
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Re: Ballast Resistors? Source?
Richard, thanks for getting me untangled. I am studying for tech, I was a novice back in 1980, so relearning things. I asked about the 300 Ohm pair in series because I can find 300 Ohm Axial Ceramic
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Richard Oscoda
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#31539
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Re: Ballast Resistors? Source?
Jim, thanks for setting me straight. I realize I would need to wire two 300 Ohm in series to get 600 Ohms. I can find 300 Ohm 5W 10 percent Axial Ceramic Cement Power Resistors easily enough but have
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Richard Oscoda
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#31538
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Re: Ballast Resistors? Source?
In SERIES, parallel will give you half the value. Maybe this was a typo. Generally speaking the closer the tolerance the better, i.e. 5% is better than 10% but the actual value is what is important.
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Richard Knoppow
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#31537
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Re: Ballast Resistors? Source?
This is not a precision circuit so the extra money spent for a 5% part means little, 10% is good enough. I think that you mean to parallel two 600 ohm 5 watt resistors to make up a 300 ohm 10 watt
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Jim Whartenby
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#31536
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Re: Ballast Resistors? Source?
Checking the math and calculating resistor power ratings using the voltages found in the manual:Power (R43) = (265v - 150v)^2 / 6000 ohms = 2.2 watts, which at 5w is a X2 safety margin.? OKPower
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Jim Whartenby
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#31535
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Edited
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Re: Ballast Resistors? Source?
Thanks for the supply lead. The soldering is messy because I was removing a huge yellow capacitor that is not on the schmatic. Showing my ignorance; can I create a 600ohm Axial Ceramic Cement Power by
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Richard Oscoda
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#31534
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Re: Ballast Resistors? Source?
I buy most of my resistors and caps from Dave at https://www.justradios.com/ Less expensive then Digikey and Mouser. Take some time and tidy up that soldering as well¡¡¡. Tom W3TA Sent:
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thoyer
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#31533
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Edited
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Re: Ballast Resistors? Source?
Amazon, eBay, Mouser [email protected]> wrote:
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Dave Jordan
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#31532
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Edited
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Ballast Resistors? Source?
Hello all, I am rebuilding a Hallicrafters SX-122. ?Two of the three ballast resisters are broken. ?Where do I find replacemets?
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Richard Oscoda
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#31531
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Edited
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FS: Hallicrafters S-15 SX-15 (?) Sky Challenger Receivers, Spare Silver Sky Challenger Dial, Spare Hallicrafters Nameplate
I have two of these. Receiver #1: in poor condition, some missing electrical components and connectors. Enclosure is poor, with a meter hole cut into the front panel, additional non-original front
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Dale WB3BEF
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#31530
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HT46 meter needed.
I need a meter for a hallicrafters ht46 transmitter. It was damaged in the process of being shipped. Please, can any one help?? message here or direct to rholstiaticlouddotcom? ? replace at with @?
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Robert Holsti
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#31529
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WANTED SX-146
Looking for a Hallicrafters SX-146; working or not, lone or buy. Walt Cates, WD0GOF https://wd0gof.com/Hallicrafters A majority of acceptance is not proof of correctness.
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waltcates
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#31528
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Re: Power distribution, was: 2-wire, unpolarized outlet ?
Hi Richard, yes the problem is terminology and it is not just because many people are abusing words; it¡¯s because for the last 10 decades there have been people fooling with generators and
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don Root
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#31527
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Re: Power distribution, was: 2-wire, unpolarized outlet ?
Jim you forgot about Romagnosi [Gian Domenico Romagnosi] In 1802 was fooling with volta¡¯s pile, and made a needle move [lots of debate] later . 1820 Orstead gets all the credit. Then what about
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don Root
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#31526
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Re: Power distribution, was: 2-wire, unpolarized outlet ?
I think you can include a number of others to your list, for instance Steinmetz. I am not sure Sarnoff should be included among inventors and scientists. He was something of a genius business man but
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Richard Knoppow
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#31525
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Re: Power distribution, was: 2-wire, unpolarized outlet ?
Don, you now have me confused. I suspect the terminology used may be the cause. DC does not have phase. I am not sure how a three-wire DC system works. Since AC and DC are quite different I don't see
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Richard Knoppow
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#31524
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Re: Power distribution, was: 2-wire, unpolarized outlet ?
DonAccording to Mr. A.I. Google, the grounding of the neutral line became mandatory with the 1913 update to the NEC.? Grounding of the building service was not explicitly required until 1918.? It
By
Jim Whartenby
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#31523
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