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  • normd's Avatar
    Today, 12:00
    normd replied to a thread G5RV question in Antennas
    tnx for the reply good to know it will work
    2 replies | 125 view(s)
  • Programmin's Avatar
    Today, 06:31
    Something I noticed today that maybe didn't happen before, The FT-65 doesn't keep on the same station if you turn it off and on. Put it on memory 010, turn it off and on and it is on memory 011. Turn off and on it is on 011. Turn it to station in memory 012, turn off and on it may be on station 013... etc. Any option or reason it does this from time to time? It seems it may do this just when in memory bank mode? (holding #BAND and selecting one)
    0 replies | 27 view(s)
  • paulears's Avatar
    Yesterday, 18:27
    paulears replied to a thread G5RV question in Antennas
    Free space is always the answer, although in practice, your version is much, much more common and worked fine for me for many years.
    2 replies | 125 view(s)
  • brandon lind's Avatar
    Yesterday, 17:51
    How far away does she work and what is the terrain like?
    1 replies | 75 view(s)
  • dtcboxfit's Avatar
    Yesterday, 08:16
    Hi Everybody, I haven't used a radio since my CB days 40 years ago. I've no idea wear radio technology is now o I need your help please. I am buying a house in a forest in Lithuania, a we will have a lot of land a surrounded by fir tree's me and my wife will need to be able to keep in touch with each other as we are doing stuff, so I need some help deciding on what type of hand held radios for local and a house to car radio so we can keep in touch when she goes to work Many thanks in advance
    1 replies | 75 view(s)
  • brandon lind's Avatar
    Yesterday, 02:21
    The 150w limit I suggested is for an infinite SWR. I agree, 400w should be fine if everything is fairly matched. I've often wondered if just a friction contact is sufficient. I suppose there is plenty of capacitive coupling even if the braid oxidizes. Never had a bad one to find out...
    6 replies | 129 view(s)
  • KC3KSB's Avatar
    Wed 20th Mar 2019, 23:49
    KC3KSB replied to a thread Handheld Radios FT-70 Select Memory Bank to Scan in Yaesu
    Your welcome. I printed this out and put it in my manual for the next time I need it.
    10 replies | 1672 view(s)
  • normd's Avatar
    Wed 20th Mar 2019, 19:11
    normd started a thread G5RV question in Antennas
    After a long break from ham radio I've decided to come back to the hobby and to keep costs down i am thinking of using a G5RV to start with. My question is if I install it as an inverted V does the 30' ladder line need to be in free space or will it be fine hanging down close to the gable end wall of my house.
    2 replies | 125 view(s)
  • WT4R's Avatar
    Wed 20th Mar 2019, 18:39
    WT4R replied to a thread Handheld Radios FT-70 Select Memory Bank to Scan in Yaesu
    Thank you!! I had the same problem and your workaround did the trick.
    10 replies | 1672 view(s)
  • Obed's Avatar
    Wed 20th Mar 2019, 10:58
    Obed replied to a thread newbie saying hi in Introduce yourself
    welcome to the forum.
    1 replies | 104 view(s)
  • WZ7U's Avatar
    Wed 20th Mar 2019, 04:52
    I just hog out the adapter a little bit to fit the size difference with a drill bit. I also just use friction for the shield connection. It works great for me! I've run up to 400 watts SSB/CW into RG-6 for quite a while now without detrimental effect that I can determine. I'm thinking you will have more trouble using an end fed antenna than using RG-6 coax (the catv quad shield stuff). Check with your local catv installers to see if they have a spool end they would rather give you than go to the dump with it.
    6 replies | 129 view(s)
  • stormtracker78's Avatar
    Wed 20th Mar 2019, 03:40
    Hello to all from the farthest point of Texas, Brownsville and South padre island. ive been into sw and ham radio for years and im in the process of getting ready to take the no tech license if omg I can get antenna theory down!!it all started for me when in 1975 when I was 5 years old my grandpa got me an orbiter satellite sw radio, hearing those stations overseas the bbc being my favorite I will never forget at that time it was strictly sw for my passion but when my dad passed away couple of years ago I made it a point to get my license as my dad grandpa and uncle all had ham licenses they were from Ohio my main family was from wads worth and Akron now that im married and settled im going to take advantage of the no tech my grandpas was a Morse code reader on the navy ships during ww2 and could read and talk with flashlights!! growing up I also started with scanners the old ones you bought the crystals for as well and various radio equipment right now I own a Grundig satellite 750 and bcd 396xt and 346xt...
    1 replies | 104 view(s)
  • brandon lind's Avatar
    Tue 19th Mar 2019, 19:44
    A mismatch between 50 and 75 ohms will yield an SWR of 1.5. In other words, 4% of whatever wattage encounters the mismatch will be reflected. At an SWR of 1.5, the mismatched loss in dB is 0.178, which is probably better than the loss in any broadband transformer you might buy. Go for it! Most 75ohm coax I am familiar with is used for TV and satellite hookup. Knowing these signals reach into the UHF region, I would assume the loss in these cables would be insignificant at HF, but the power levels they can handle are not great as they were designed for reception only. A quick look at the coax list in the ARRL handbook shows that typical 75ohm coax has a maximum Vrms of 300V. Since forward signals add to reflected ones to make the standing wave, we can assume a maximum forward voltage on these cables should be kept under 150Vrms. Since E^2\R=P, 300w at a total mismatch would yield a maximum standing voltage at the hot spots of 300V. So, to be safe, if you intend to TX on that cable, I would recommend...
    6 replies | 129 view(s)
  • stormtracker78's Avatar
    Tue 19th Mar 2019, 18:02
    thank you very much!! would you recommend rg8x or rg213/u or lmr 240 I heard rg213 i.e. great for the lower bands because of the solid core copper wire albeit because of transmission but should work for signal reception I think but really just want to get the right coax, almost 100 foot run but more like 70 I have 2 chokes mfj915 and my antenna cmc 0510r I was going to put a 20 foot or so jumper from antenna feedpoint of balun then at 20 foot mark the mfj 915 then a 50 foot run to a 3 foot jumper to receiver with the cmc 0510, also soldered versus crimped abr has crimped but good cable mp digital and dx have soldered any info on those? thanks again!!
    6 replies | 129 view(s)
  • OH8GAD's Avatar
    Tue 19th Mar 2019, 16:35
    Oh yeah, and welcome to the forum! :)
    6 replies | 129 view(s)
  • OH8GAD's Avatar
    Tue 19th Mar 2019, 16:32
    The specs give the input impedance at 50 ohms (link: https://www.universal-radio.com/catalog/commrxvr/0084spec.html), so I would stick with 50 ohm. Since you're not putting power into the cable, you're not going to damage anything, but from what I've read, 75 ohm stuff is generally much more lossy than 50 ohm cable. I think it is because the 75 ohm cables are usually made for broadcast receivers such as TV and FM radio, where power levels are much, much higher that trying to pull in an amateur station running 500 mW the other side of the globe on 20 metres. Also, I'm not sure about PL259/SO239 (laughingly called "UHF") connectors, but with N-type connectors (N, BNC & TNC), the centre pin for the 75 ohm type is wider than the 50 ohm version. So, if you put a 75 ohm plug into a 50 ohm socket, you risk damaging it.
    6 replies | 129 view(s)
  • stormtracker78's Avatar
    Tue 19th Mar 2019, 00:02
    I just got my alnico dxr8t in and also my qso king 117 foot end fed antenna with there 9:1un/un from bruce at maple leaf which coax would be the best im thinking of drf 400 but since its receive only receiver I am hearing 75 ohm is just as good and cheaper but if im right the end fed should match the receiver which I believe is 50ohms any advice would be so appreciated thanks!!
    6 replies | 129 view(s)
  • paulears's Avatar
    Mon 18th Mar 2019, 08:35
    What's reception like? Do you get a sharp peak in performance at the frequencies you think the antenna is resonant? Does the background noise shoot up at a certain frequency and then drop off again the other side - that will give you a clue if your antenna is actually working. If your antenna appears to function on the wanted bands, then I'd give it a shot - but if you need proof of matching, then wait for the VSWR meter and set your mind at ease - Me, I'd listen for somebody calling and respond to them and see what happens.
    5 replies | 253 view(s)
  • brandon lind's Avatar
    Sun 17th Mar 2019, 17:06
    The voltage in the service manual states: 7.2v nominal, 6-16v while on external supply and 11 to 16v while charging. If you have 7.9v, I would think that's within spec. Does it affect just the display or does the actual TX/RX frequency drift as well? If so, does it do it in both 2m and 70cm or just one of the bands? I imagine a problem like this needs a scope to track down. Everything looks like surface mount parts in the manual. Do you have a scope? If I had to guess without knowing anything else, I might suspect a worn rotary dial. There are also 2 electrolytic capacitors, one of which (C1004) is at the input to the 3v regulator (and the 3v regulator appears to supply the PLL). It might be worth checking.
    1 replies | 117 view(s)
  • GTGallop's Avatar
    Sun 17th Mar 2019, 15:15
    I picked up the ARRL VE and a buddy of mine hooked me up with the Laurel Group so I got their VE as well. I'd recommend you doing the same. Laurel uses computers so the test is submitted instantly vs sending in all of the paperwork. Just because we like radio doesn't mean we have to manage paperwork like Marconi did. https://www.marcclub.org/mweb/education/exams/volunteer.html
    3 replies | 171 view(s)
  • N4AAB's Avatar
    Sun 17th Mar 2019, 00:14
    The voltage reads 7.9v when I turn it on. I have had the radio for a few years, about 3. The frequency readout on the front wobbles up and down. Before it read 147.090 just like it should, but this year the read out wobbles up and down. Sometimes as much as a MHz. More typically up and down about 3 to 5 KHz. What could be wrong with it ? Could the battery be bad ? Thanks. I haven't checked it with the adapter, but last time I charged it the voltage read 11.? Volts when it was being charged. The case got hotter than usual during charging.
    1 replies | 117 view(s)
  • N4AAB's Avatar
    Sun 17th Mar 2019, 00:06
    Yes, ARRL VE. Working with the ham radio club I belong to.
    3 replies | 171 view(s)
  • KD3WB's Avatar
    Fri 15th Mar 2019, 17:09
    KD3WB replied to a thread Base Radios Low power related to antenna mismatch? in Amateur Radios
    You need to perform the initial tune up. See the "Transmitter Section" of page 140 in the manual. I don't think the rig cuts back on power in a mismatch situation, so keep your test transmissions short. Ben
    5 replies | 253 view(s)
  • K7KBN's Avatar
    Fri 15th Mar 2019, 06:59
    K7KBN replied to a thread Base Radios Low power related to antenna mismatch? in Amateur Radios
    Another piece of equipment that would be useful here is a dummy load. That would rule out the antenna and feedline. You DID get the operating manual for the 101, right? I built the HW-101 back in the 1970s. With its pi-network output, a separate "tuner" is often not required. I operated mine for a couple of years before I ever used an SWR indicator. My 20 and 15 meter dipoles each had over 2:1 - almost 3:1, but the transmitter was putting out full power CW with no strain. More modern rigs, especially the solid-state final-types, are much more finicky with loads they don't like. That's where the dummy load shines. Just a 50 ohm, non-inductive resistor or combination of resistors equaling about 45-55 ohms and sized to handle the transmitter power. Presents a near-textbook load for the typical "50 ohm" output of a typical ham transmitter.
    5 replies | 253 view(s)
  • WZ7U's Avatar
    Fri 15th Mar 2019, 06:52
    As long as someone has a license, they can transmit the radio, but I don't see on the web where a built in swr meter is a feature. I doubt a cb swr meter will work as accurately as you might want for a $300+ radio. Maybe someone in the area has one you could use, or watch while they do it or something. I grew up next to the front range near Littleton way back in the 20th century. I sort of miss that part of the world, but I do not miss the bomb cyclone you guys just had. Stay safe, stay warm.
    2 replies | 133 view(s)
  • WZ7U's Avatar
    Fri 15th Mar 2019, 06:45
    WZ7U replied to a thread Base Radios Low power related to antenna mismatch? in Amateur Radios
    Without knowing the specifics of how you are going about this, are you certain you are loading the transmitter up properly? It seems to me with the two knobs in the upper left you should be able to peak and dip the finals to achieve max zap. Unless you are trying to tune up in an ssb mode... Try using a cw key (or just any old switch will do) to engage the transmitter and tune 'er up. If I'm not mistaken, that rig should be able to handle a bit of mismatch with ease by simply tuning the knobs. Perhaps you should scour the net for detailed tuning instructions for your rig so you are nearly guaranteed of getting it right the first time. Just my .02¢
    5 replies | 253 view(s)
  • Jon Hudson's Avatar
    Thu 14th Mar 2019, 16:57
    SDRplay is pleased to announce the release of SDRuno v1.3. This is a major upgrade to SDRuno, which adds a number of important new features and is intended for all RSP models including the now discontinued RSP1. Major new features include: Frequency Scanning (for both frequency ranges and stored memory panel lists) I/Q → Audio Output (for CW Skimmer for example) A new configurable IF AGC scheme For a full list of additions/changes and bug fixes, please see the release notes at: https://www.sdrplay.com/do…/SDRplay_SDRuno_Release_Notes.pdf
    0 replies | 100 view(s)
  • K5MOW's Avatar
    Thu 14th Mar 2019, 11:39
    K5MOW replied to a thread Base Radios Low power related to antenna mismatch? in Amateur Radios
    I am not real familiar with a Heathkit radio. My dad had one in the early 70s and that’s what got me interested in amateur radio but I have never purchased one yet. As for your question. A modern transceiver will definitely drop in power when the antenna is not matched properly. Radio at that age would most likely be extremely dangerous transmitting. I would think it would be easy to burn out the finals when the antenna is not matched properly. The quick answer to your question is yes I believe the power would be dramatically dropped if the antenna is not matched. Transmit on very low power with your tuner and SWR in line until you get it matched. Roger
    5 replies | 253 view(s)
  • K7KBN's Avatar
    Thu 14th Mar 2019, 04:57
    Hi Tinbender - My mom was born in Burlington CO, just a short distance from KS. She told me that there was a "Welcome to Burlington" sign at the turnoff from the highway and somebody had put a "Welcome to Kansas" sign on the same post. I still have a few relatives in Kanorado KS which is a LOT closer to CO.
    2 replies | 133 view(s)
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