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KD3Y last won the day on September 10

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About KD3Y

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    Amateur Extra
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  1. Officers is always blaming us poor lowly enlisted guys for everything. ;)
  2. They sell the replicas Jim, fairly cheap. If you're looking for a genuine one you probably won't find it at a fair or antique shop. I understand eBay is full of fakes at genuine prices, so keep that in mind so you don't get "got". Depending on your taste and budget they vary from really nice expensive to not so expensive. A google search turns up a lot of modern replicas. https://www.chelseaclock.com/radio-room-clock https://www.cafepress.com/amradio.4040868
  3. Here's one from a British ship. It is marked for the 500 Khz (red) and 2.125 Khz (green) silent periods. So if you were in distress, you had the opportunity every 15 minutes to send an SOS uninterrupted by regular traffic, on one freq or the other.
  4. I'm got lucky with my local repeater. The county EMS and police have their racks in the same building and use the same tower. So there's 1,000 gallons of fuel and a standby generator. My repeater isn't going without power if any fuel can be had.
  5. Self deploying is too much like volunteering.....I learnt my lesson already..... "I need three volunteers"......"What for First Sarn't?......."Now I need two volunteers".
  6. It's a clock for a radio operators room on a ship. Prior to the Titanic, there were no "rules" for radio. Every company sort of did what they wanted to do and any power level they wanted concerning radio. After the Titanic loss, the Radio Act of 1912 was passed and regulations were made. One of those regulations were all ships at sea and all coastal stations had to have a 24-hour radio watch. If you recall, the closest ship to the Titanic was the Californian, but it's radio operator had closed the radio room and gone to bed. So he never received the Titanic's SOS call. The Californian was within 10 miles of the Titanic and could have most likely saved everyone had the radio operator been at his post. One of the new regulations was that there were designated times of radio silence. They were denoted by the red wedges on the clock. Because back then, with the spark gap, and everyone doing what they wanted to do regarding transmitting, SOS signals were often walked on or just not heard. The "emergency" frequency was designated 500 KHz by the Radio Act of 1912 and the +15 to +18 minutes and +45 to +48 minutes after each hour were "radio silence" where all radio operators on ships were required to stop transmitting and listen for SOS calls. They later added the 2125 Khz in the 1940's and those times were 0 to +3 and +30 to +33 minutes after the hour. Those radio silence periods were denoted with green wedges, so later ships clocks had both red and green wedges on it. Any radio operator transmitting during the radio silence periods would hear "QRT SP" (Stop sending - Silent period!) and he might lose his coveted ships job and be reassigned to a land station. After the titanic disaster, some guy, I forget who, invented a radio device. It didn't transmit, it only listened. They were installed on all ships. When an operator keyed four four-second dashes at one second intervals, the machine would flash lights and ring loud bells automatically. So if the Marconi operator was asleep or away from his desk, all the noise and flashing lights would get his attention to the SOS call. I guess you could say it was the first EPIRB. The red sections around the outside of the dial indicate four-second dashes at one second intervals (the operator would hold the key down as the second hand traveled the red section and release it as it traveled the white section. I guess the idea was if your ship was sinking and you were in a panic, it was a visual aid so the ships radio operator would do it right to trigger the radio alarm on nearby ships. The Radio Act of 1912 required each ships radio room to have one of these clocks easily visible to the radio operator. Real clocks with this face from that era sell for $1,000 to $2,000 dollars. They were also fitted on aircraft during both world wars for the same reason. Maybe that's why he valued his since he was a pilot. Here's an image of the radio operators clock on the Liberty Ship SS John Brown.
  7. So I found this tide clock in a thrift store. About a pound of solid brass, not the thin tin brass stuff. I had seen them online for $160 but there wasn't a price tag on it. I asked the lady how much it was, expecting to hear $60 - $80 or so. She said the clock doesn't work and she'd take fifteen bucks for it. I couldn't get my wallet out fast enough. I bought a clock mechanism for ten bucks and did some photoshop work on some photo cardstock. Now I got a neat clock for the shack. ""CQD, CQD, this is Titanic......."
  8. KD3Y


    LMR-400 may be just as good or better UV protection as RG-213 but I didn't question it. I assumed if LMR-400 was newer and better than RG-213, the UV protection was probably there. The guy spoke of it in his video when he compared RG-8 family to RG-213. But I never realized until you just mentioned it that he never mentioned UV protection in his RG-213 to LMR-400 comparison. I believe for the price difference of thirty bucks it's worth the LMR-400. If it was 50 or 75 dollars difference, then it'd be a consideration. I especially appreciate the the EMI and RFI sensitivity advice. I'd like to stay as far away from EMI and RFI noise as I can.
  9. KD3Y


    Thank you Sir. My "longer version" had the details. But if what I've learned about coax is true (and correct me if it isn't) I had settled on LMR-400 but after watching some youtube videos on "which cable to use" and such, I was swayed to RG-213 by "the experts". That's just how it is when you don't know what you don't know. From what I understand, RG-58 is high loss in VHF & UHF, used mainly for runs less than 50 feet in frequencies above 100 Mhz and less than 50 feet for frequencies above 400 Mhz, often used for mobile radio installations in a vehicle. Readily available, cheap, but high loss. OK for short runs, such as mobile installations is vehicles but it's high loss in long runs. RG-8X is better than RG-58, Works well for 50 - 75 foot runs in UHF & VHF but still lossy. Medium price range. But quality varies with manufacturer. RG-8U was the military spec 52 ohm, better than RG-8X due to the larger diameter center conductor and suitable for 50-75 foot runs in the UHF & VHF frequencies. RG-213 replaced the mil spec RG-8U and has lower loss and better UV protection than the RG-8 family (which is why I considered it since half my run will be outside in the sun. LMR-400 is the best, very low loss and suitable for the Ghz range. Since I'm only using VHF and UHF right now, my man question was, am I wasting money on LMR for performance I'm not going to use when RG-213 will do the same thing. Not trying to be a cheap ass, I just don't see the need for paying extra for capabilities I'll probably never use. My run will be about 75 feet. Through the floor, across the crawlspace, through the foundation block, then 20 feet up the mast. Probably half that will be outside in the sun and salt air. If LMR-400 is what I need, then I don't mind spending the extra 30 bucks. I think I can rule out RG-58 obviously, and RG-8X, and probably RG-8U. So I was in a toss up over RG-213 or LMR-400. I also was concerned though I'm simply VHF and UHF now, I probably will go to HF in the future, and didn't want to have to re-run cable again in a year unless I had to. On a less bothersome note, for any interested, I updated my website last night and added my morse code practice key HERE. I still get an error when the user keys in some dot/dash combo that doesn't exist in morse code. I can't determine if it's my script that's returning the error or if it's a limitation on the cheap hosting I'm using and the server doesn't' know what to do in that case. Probably the later as it works fine local until I upload it to the server. Oh, and I usually drink Newcastle, so I'm a cheap date. 🙂 Anthony kt4obx
  10. KD3Y


    Maybe this post will go thru. The last one posted Thursday morning disappeared in the "Needs moderator approval" shredder. So rather than waste 15 minutes typing out a detailed, well explained paragraph, since it probably won't post this time either, I'll just cut to the chase. Can I use RG-213 for my radio to antenna run, about 75 feet, for UHF & VHF, or will LMR400 offer me something that RG-213 can't?
  11. KD3Y

    Antenna mast

    Thanks Jim. I learned more in the Infantry than just how to paint rocks and how to mow grass with a pair of scissors. ;)
  12. KD3Y

    Antenna mast

    Yeah that's what I was considering when I was thinking about how I'd do it. My buddy Larry up the road about 4 blocks has a similar antenna on a 40 foot tower in his backyard. That whole thing is iron. When I get it grounded and get my coax, I'll let you guys know what I learn so far as TX and RX.
  13. KD3Y

    Antenna mast

    Well. I can't manage a telephone pole by myself (I wish I could). I mounted a TV antenna on a 20 foot 4x4 a couple years ago for a lady down on the beach and the thing has bowed like a banana, so I'm limited in my options I suppose. So... I 'm in a compromise. I set two five-foot iron pipes into 5 feet of concrete for the base. I secured the mast with two 1/2 inch hard stainless bolts. I can remove one of the bolts and lay it down flat for maintenance or when the hurricanes blow. I haven't connected it yet as I still have to drive a ground rod and connect it. Right now it's basically a huge lighting rod beside the house. I suppose if the iron pipe does affect it, it'll still get me further than the 1/4 wave magnetic mobile sitting on top of the refrigerator right now. 'preciate all the input. At least I'll know what to expect when I get it finished, and what issues to look for.
  14. Thanks Jim. I ain't so sure society could handle more than one. The club really did have a great presentation on grounding VS bonding before the testing.
  15. I hope y'all will pardon me if I do a litttle bragging. Passed my Extra exam this morning. As you probably know, the exam is the "color in the bubble" type exam. I had Exam version #4. The VE uses the plastic thing with the holes in it to grade the exam. He was going down marking red on nearly every question. I sunk a little lower in my seat and was like, this ain't good. I really thought I did better than that. Then the other VE told him he was using the wrong plastic thing with the holes in it and needed to use the one for exam #4. Things brightened up for me when he used the plastic grader thing for exam #4. 🙂
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