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  • MitchellB's Avatar
    Today, 19:39
    MitchellB replied to a thread ALC cable to linear? in Accessories
    I admire anyone that can do CW. My CW skills are far from being of much used to me yet. It is a slow learn for me. I go though a few months of trying real hard to learn and give it up for a few months and go back again for more tortured learning. Right now I am in one of those off months where I have given up again. I was to the point I knew all the letters, numbers and some of the punctuation, but I had to receive very very slowly between characters to decipher them. I could send better than receive. I'll go back and dive into to it again at some point, maybe when the weather turns cold. I got my ARB704 interface yesterday and connected it to my FT847 STBY connection to test to see if the interface XMT light would switch on when I keyed up the transitive and it did. So I'm assuming it works, but I do not have an amp to test it with yet. Yea, I feel your pain about the getting old. My last antenna I put up was my 40-6m Windom and I tried to rope it off so that I would not need to climb a...
    10 replies | 416 view(s)
  • OldTube's Avatar
    Today, 19:30
    OldTube replied to a thread Kenwood Rx1000 in Antennas
    Just wanted to let you guys know that I got my new PL259 connectors and they work just fine. Just based on their design it was more intuitive as what to do. Soldered the tip and checked that I did not get the ground fibers touching the pin. Got it strung out late last night and what a difference. Was too late to get it up high very far but my signal meter on the R1000 was showing a very strong signal on each station received, something I had not seen before. Thanks to so many that stayed with me on this and offered their thoughts. Regards, Don
    24 replies | 642 view(s)
  • tgabi's Avatar
    Today, 17:45
    First, thanks Paul for your time. >Have you tracked down the noise to your computers - wideband antennas suffer badly from the rubbish that is everywhere nowadays. Yep, computers and networking gear do generate lots of noise. Fortunatelly the antenna is far from these - hence the 50ft of cable. >if your long wire has a counterpoise (how I hate this new term used so often) then this can often make it more prone to interference. I guess the way to start is to remove the antenna from the SDR and check that all noise >vanishes. Yes , did that. I guess I wasn't clear enough. If a put a large cap on across the input the noise floor goes below -110db. Without the cap the noise floor is somewhere above -90db.
    3 replies | 78 view(s)
  • sid's Avatar
    Today, 17:42
    sid replied to a thread Howdy in Introduce yourself
    Bill, Take a look at the TYT 8000D - brilliant for the money and much better than the budget Baofengs...:peaceful:
    4 replies | 143 view(s)
  • Obed's Avatar
    Today, 17:12
    icom makes a lot of rigs, in a wide price range....even back then... which rig? Is there an icom repair shop in your area or are you going to have to ship it? We had a local icom authorized repair center here until about a year ago... before they closed down they had a 50 to 75 dollar diagnostic fee... then you could decide if you wanted to repair it or not...
    1 replies | 39 view(s)
  • 5B4AJB's Avatar
    Today, 14:22
    For QRP levels of power it might be useful, probably not though... experiment! Those things can physically explode if they get over saturated for a long time, especially if you have a mismatch. Contain it if you want to use more than a few Watts and periodically check if its getting hot in use...
    1 replies | 64 view(s)
  • om1ava's Avatar
    Today, 13:33
    Hi everyone, Can I replace the above by disassembling DVI computer cable and use those ferrites as the choke on an antenna coax feed? I could stick it with a tape. Is the ferrite suitable for HAM radio purposes? Thanks Norbert
    1 replies | 64 view(s)
  • paulears's Avatar
    Today, 12:18
    Have you tracked down the noise to your computers - wideband antennas suffer badly from the rubbish that is everywhere nowadays. if your long wire has a counterpoise (how I hate this new term used so often) then this can often make it more prone to interference. I guess the way to start is to remove the antenna from the SDR and check that all noise vanishes. Local noise spread by the cables (usually along the screen) often gets into the SDR dongle via the USB cable, so removing the antennas often removes the signal and leaves lots of noise. Are you feeding the wire via a length of coax to get outside, then the wire goes from there? Again - if you can, remove the wire, leaving just the coax - how is the noise then? Add the long wire, and try again, then add your counterpoise and do it again. Bit by bit you build up your knowledge of the system. What will probably happen is that the noise might go up, but the signal goes up by much more, or vice-versa. Have you tried grounding your counterpoise (yuk) just...
    3 replies | 78 view(s)
  • tom3holer's Avatar
    Today, 12:09
    Hi, I have been away for over 25 years but just getting back into the hobbie. I have a Icom sitting on the self that I just plugged in and the display did not light up and after a couple of minutes I saw a small amount of smoke coming out of the bottom. Mt question is is it worth trying to have this rig repaired or should I just look for another used rig? Thank you, Tom K1FQY
    1 replies | 39 view(s)
  • Obed's Avatar
    Today, 11:09
    first thing I would suggest would be to make sure that everything is properly grounded. Each computer and receiver grounded separately not daisy chained.
    3 replies | 78 view(s)
  • paulears's Avatar
    Today, 08:16
    paulears replied to a thread An SWR query in Antennas
    Indeed - you pay for it!
    5 replies | 142 view(s)
  • maryhuang's Avatar
    Today, 05:45
    Already update it , thank u for your help
    9 replies | 23865 view(s)
  • tgabi's Avatar
    Today, 05:19
    Greetings, I'm new to ham radio so please don't be offended by the noob questions. So far I have a random wire antenna (and some counter-poise) feeeding an SDR trough 50ft of RG58. I have a FET preamp (homebrew) close to the antenna that also adapts the impedance. In the shack I have several computers - related to my day job - that are generating lots of noise. I'm wondering if there's anything I can do 1) reduce antenna noise (I know the SDR and the preamp are generating very little noise) and 2) get the antenna signal inside the shack without the use of the preamp so I can experiment during the winter with filters and other devices (like MFJ-1206). So far I haven't seen a receive-only antenna guide and I'm trying to understand what are my options. I don't plan to transmit anything for awhile and I don't mind re-doing the setup once I decide to transmit. So basically how can I move the preamp inside without adding more noise. Without the preamp the cable shield picks up lots of noise.
    3 replies | 78 view(s)
  • WA9WVX's Avatar
    Today, 03:40
    WA9WVX replied to a thread ALC cable to linear? in Accessories
    Hello Mitch, I know exactly what you mean with these Flu bugs ... when my XYL (WB9YCW) gets one, no matter what I do to avoid catching it, I normally do and in my case it hangs on for 2 weeks. She's always in the holiday spirit and says, It's better to Give than Receive! I've got to get her out of that mode. As far as your OCF Dipole being at 20,' no sense to raise it since it's working so well. I've got a friend who lives at the base of the Smoky Mountains in Tennessee that uses a IC-735 transceiver and a Collins 30L1 600 W PEP RF Amplifier and has worked stations all over the world using that combination of equipment, He an excellent CW Operator running 35 to 40 WPM has his DXCC and loves to contest. So when you do decide to purchase the AL800 RF Amplifier, I think you'll do just fine. I'll need to add RF Surge Protectors at the base of my tower to prevent the Lightning from entering the house. I need to locate a pair of "N" Type connectors for my older 7/8" Heliax for the 2 m / 70 cm band and dig...
    10 replies | 416 view(s)
  • mrfdes's Avatar
    Yesterday, 21:21
    mrfdes replied to a thread An SWR query in Antennas
    Interesting, thanks. To be quite honest, I don't believe in wasting available power. Why have 100 Watts (not that I have that many, mind you), and only use 40? 73.
    5 replies | 142 view(s)
  • K7KBN's Avatar
    Yesterday, 21:08
    Soldering iron keeps melting my plastic coat hangers! ;)
    3 replies | 107 view(s)
  • paulears's Avatar
    Yesterday, 21:08
    paulears replied to a thread An SWR query in Antennas
    No problem - if your VHF reading is fine, UHF will follow. I always like to think about VSWR being more about wasted power nowadays, as the radios seem pretty tolerant. You want everything to go out, and wasted power is well, just wasted! Paul
    5 replies | 142 view(s)
  • paulears's Avatar
    Yesterday, 21:04
    I find it very odd that people become hams to communicate with just one person. While I appreciate your need to communicate, ham radio just isn't a solitary hobby, so using a ham repeater and only talking to her occasionally to check it still works is not really that useful. My experience of natural emergencies in the UK goes back a fair while, and is thankfully rare, but when anything local happens, and in our location the issues are always tidal, being on the coast - the hardly ever used repeaters burst into life with the local hams suddenly popping up, listening and keeping everyone informed from the various locations they're at. My guess is that if an earthquake did hit your area, the same thing would happen and as your area is highly populated, I'd expect the repeaters to be very busy, and your chances of a meaningful chat with the wife are slim. I don't know about US repeaters, but none of the local ones here have battery backup, just a very short life UPS. In your area, maybe the earthquake thing...
    2 replies | 110 view(s)
  • mrfdes's Avatar
    Yesterday, 20:45
    mrfdes replied to a thread An SWR query in Antennas
    OK, thank you for this reply, paulears. I am a newbie to HAM Radio, the only experience I have that could be a bit relevant is what I learned on the 11 meter band (CB) many moons ago. Thanks again.
    5 replies | 142 view(s)
  • paulears's Avatar
    Yesterday, 20:40
    paulears replied to a thread An SWR query in Antennas
    No, not really. a wave for 2m, is a wave for 70 - so they work fine - in fact, my van antenna is cut for marine band, but VSWR wise, business band and amateur band are about the same either side and I can use the UHF business band channels too - VSWR rolls off quite gently either side and frankly radios are rarely that upset by VSWR that isn't ideal - the majority get a bit concerned when it gets to 3 or 4 to 1, and compensate by just rolling the power off. Most decent kit is designed to be used by twits who forget to plug the antennas in, and in nearly 40 years I've never had a hand held or mobile damaged by bad VSWR - the worst is that you don't get anyone reply. Of course, this assumes the radios are well designed - I've got a KT8900, and it doesn't get annoyed if I accidentally transmit without the antenna in!
    5 replies | 142 view(s)
  • paulears's Avatar
    Yesterday, 20:30
    Solder a coat hanger to a plug, and cover it in tape - just as good, and apart from the plug, free!
    3 replies | 107 view(s)
  • KA9UCN's Avatar
    Yesterday, 20:05
    KA9UCN replied to a thread First yagi in Antennas
    it will work fine
    4 replies | 220 view(s)
  • KA9UCN's Avatar
    Yesterday, 20:02
    www.amazon.com/dp/B075445JDF/ref=as_li_ss_tl?ie=UTF8&linkCode=sl1&tag=rsv0f-20&linkId=c5befe9ec40bfb429944bbedba8dd37e
    3 replies | 107 view(s)
  • mrfdes's Avatar
    Yesterday, 19:42
    mrfdes started a thread An SWR query in Antennas
    Hi, I just bought a QYT KT-8900D rig, which came with a Nagoya SP-45 VHF/UHF antenna. At the moment, I only have a Zetagi 201 SWR meter, which only goes up to 200 Mhz. I was wondering, since both bands are controlled from one antenna, if it is very likely that, when I have a correct SWR on VHF after adjusting the length of the antenna (if necessary), that the UHF SWR reading will be very wrong. Could anyone enlighten me on that, please? Thank you in advance.
    5 replies | 142 view(s)
  • N6OVZ's Avatar
    Yesterday, 18:16
    N6OVZ replied to a thread Howdy in Introduce yourself
    I have been looking a round a little on e-bay/amazon just to see what is what. Looks like the Chinese have made their presence known in the radio market. I saw a dual band HT for $27.00 with rechargeable battery and free shipping. And it had pretty good reviews. That's pretty wild! Yes sir, I remember packet. I fooled around with that for a while too. I see that Astron is still making power supplies. Prices seem about the same. I see a lot of cheap power supplies too. These must be the ones you were talking about. Thank you for your response. I feel a little lost in all of this. Bill
    4 replies | 143 view(s)
  • 5B4AJB's Avatar
    Yesterday, 17:40
    5B4AJB replied to a thread Howdy in Introduce yourself
    Erm, where to begin. No, seriously, not much. You'll find a whole lot more noise on the bands nowdays thanks to cheap switch-mode power supplies. A couple "new" Amateur allocations down under the Medium Wave band. Something rather nice on the flip side called SDR (Software Defined Radio), plus a whole heap of new data modes (you do remember packet radio, don't you? On the whole, quite a bit to get exited about, but using valve gear is nothing more than nostalgic due to the amount of noise/stations abound. Pretty much everything can be found on ebay now, go and buy a $50 pre-pay visa and knock yourself out!
    4 replies | 143 view(s)
  • sid's Avatar
    Yesterday, 17:22
    sid replied to a thread Howdy in Introduce yourself
    Welcome mate....
    4 replies | 143 view(s)
  • MitchellB's Avatar
    Yesterday, 16:03
    MitchellB replied to a thread ALC cable to linear? in Accessories
    Thanks for the compliment on the pic. Growing old sure ain't for the faint of heart. My wife was forced to take a flu shot last week where she works (she gets to retire in 3 months). The next day she got the flu and then I caught it from her. She got better in a couple days, but I am still fighting if. Sorry to hear about your hospital visit and hope all works out for the good soon. Maybe you can take a handheld in there and at least talk on your local repeaters. I also use a Windom cut for 40-6m pointing north/south, but it is not nearly high enough (only sitting on a 20' pole at the off-center), but tied off in a tree about 35-40' up. However I am surprised it does as well as it does. I used to have a homemade fan dipole. but the Windom has a lot less tie offs to dodge when mowing and seems to do just as good if not better. I am thinking about buying another 10' section of pipe and at least raising the off-center up to 30', but just not sure if I can get away with it without using extra tie...
    10 replies | 416 view(s)
  • K7KBN's Avatar
    Yesterday, 13:55
    Were you doing "Les Mis", or getting into a Quasimodo-like appearance for "Hunchback"? ;)
    7 replies | 234 view(s)
  • kc5fm's Avatar
    Yesterday, 10:58
    What would be wrong with LISTENING on one of those two repeaters (determined with your wife which one)? You say "KX6XXX listening" and she says "KX6YYY listening". You both know the other is fine. IF either of you have an emergency, call the Mayday on channel. You get help. You know help is coming, even if it is you who is the helper.
    2 replies | 110 view(s)
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