Jump to content

aa7jc

Members
  • Posts

    28
  • Joined

  • Last visited

Reputation Activity

  1. Like
    aa7jc got a reaction from WRYZ926 in Wouxun KG-935G receiver front end.   
    I ran a simple receive test with three radios that were off frequency by only 12.5Kc from the transmitter.

    The Wouxun "KG-935G" was able to filter out the off frequency station. 
    The Anytone "AT-D878UVII plus" and the Baofeng "UV-82HP" both failed.
    Ken WQXQ522
     
  2. Like
    aa7jc got a reaction from WRTU454 in Wouxun KG-935G receiver front end.   
    I ran a simple receive test with three radios that were off frequency by only 12.5Kc from the transmitter.

    The Wouxun "KG-935G" was able to filter out the off frequency station. 
    The Anytone "AT-D878UVII plus" and the Baofeng "UV-82HP" both failed.
    Ken WQXQ522
     
  3. Like
    aa7jc got a reaction from WRUK478 in Kg935g   
    I bought one and so did my Son-in-law.  Pretty nice little radio for a very reasonable price. I love the long lasting 3200 mAH battery and its very sensitive receiver.  
    Ken WQXQ522
  4. Like
    aa7jc got a reaction from TNRonin in Wouxun KG-935G receiver front end.   
    I ran a simple receive test with three radios that were off frequency by only 12.5Kc from the transmitter.

    The Wouxun "KG-935G" was able to filter out the off frequency station. 
    The Anytone "AT-D878UVII plus" and the Baofeng "UV-82HP" both failed.
    Ken WQXQ522
     
  5. Thanks
    aa7jc got a reaction from WRTZ740 in Newbie from OH-IO   
    Welcome
     
  6. Like
    aa7jc got a reaction from kerstuff in Wouxun KG-935G receiver front end.   
    I ran a simple receive test with three radios that were off frequency by only 12.5Kc from the transmitter.

    The Wouxun "KG-935G" was able to filter out the off frequency station. 
    The Anytone "AT-D878UVII plus" and the Baofeng "UV-82HP" both failed.
    Ken WQXQ522
     
  7. Like
    aa7jc reacted to WRFE959 in Midland MXT575 Drops Next Week.   
    I purchased two MXT575's.
    My mobile with the 6db midland antenna is working great for my needs.  I can work all my local repeaters very reliably with my setup (20-30 mile range).  And if I am stationary with a clear view of the north sky, I can check in on a repeater just over 90 miles from my location.  Couldn't ask for much more with the MXT575 + 6db antenna.
    I particularly like the simplicity.  Yes, I have a couple of Wouxon's where I can program in 1,000 channels.  But honestly, all those channels turn into clutter.  Let's face it, I am generally working 8 frequencies or less.  I know some of you have multiple repeaters on the same freq with different tones - which has not been a problem for me - and from the map I look at around the country most do not have this problem.   And I do enjoy checking in on other repeaters when I travel.  But as mentioned above, I can make note on my phone of the repeaters I want to try.  It takes 5 seconds tops to swap TX tones.  I leave the RX tones open to listen for traffic.
    My second is for a base station.  Still working on antennas for that one.  I need more height at home to really get the performance I want.  But I am able to check in on local repeaters.  And it makes a very clean installation.  I can hide away the main unit.  I purchased a RJ45 extension cable (for mobile and base).  With all the controls on the mic, the base unit and power supply are hidden.  Very nice install.
    For my base installation, I even put a WIFI power outlet on the power supply.  So when I am around town, if I want to contact Unit 2, I can turn on the base station from my phone, and call out to my base station from the mobile.   The 575 returns to the last state, so powering on the power supply turns on the 575 to the last channel.   
     
    Couldn't be happier with the 575.
  8. Haha
    aa7jc reacted to WRQB993 in Midland MXT575 Drops Next Week.   
    I only watch the ones with GMRS geeks and youtube hobos.
  9. Like
    aa7jc got a reaction from tdukes in Antenna tuning question   
    I just got a 1486 last week and I cut it for 462 using a nano-VNA. 
    The sections that need be to cut look like they are brass.  I cut them accurate and clean just using my scroll saw
    So far performance is pretty good.  The chart was pretty accurate for me.. In the end my lengths were exactly what the chart suggested for 462. 
    I have heard that many people found that the chart was off for them so be careful not to cut too short! 
    It is easy to be off by a mm or so depending how you hold your ruler to the base of the coils. I measured with the butt of my zero clearance ruler touching the base of the coil.
     
    .
  10. Like
    aa7jc got a reaction from wayoverthere in RT97S wideband operation   
    The spurs are in section 5.9 starting on page 23.  I don't know,  I doubt it though since the radio got a "PASS". 
    Hey thanks for the link on the GRANT..  It took me a while but I finally figured out what to click in their search results to see how you got it Lol!
    This is a great thread.. lots of info.
    Ken
  11. Like
    aa7jc reacted to KAF6045 in GMRS-50X1 Display   
    You don't want to see the cable runs I used... really, a 9+ft power lead, with an 11+ft control head cable. What are you expected to do -- mount the control head as a hood ornament? I had to splice another 9 or so feet into the power lead to make it reach from the Liberty under-cargo bed storage box to the battery, the control head cable just made it. I had to obtain a microphone extension cable (I didn't trust the cable I made from UTP phone line and RJ-11 (or was it RJ-45... think it was RJ-11 6 conductor). Also had to track down a headphone extension cable for the remote/external speaker (mounted behind the arm-rest/console). I didn't save the phone images of the cable runs -- 3/4inch split plastic flex conduit from main box, along cargo bed, forced down in the gap of the folding rear seat, along the door trim, to just under the hood release -- with cable clamps screwed in at intervals. Smaller conduit from battery to firewall (at least I found an unused rubber plug passthrough -- cut X in plug, push power lead through it. Cables for the mag-mount GMRS and CB antennas are on passenger side with 1/2 conduit.

    The 5100 microphone mount is almost visible. Just at the bottom of the photo -- the black bit on light grey next to steering wheel.
  12. Like
    aa7jc reacted to CMG1012 in KG1000G not transmitting   
    Reception was fine. Continuity was fine within the antenna cable. So I went to look at the antenna specifically and under close examination the cylindrical "cover" had displaced from the base... it's a midland 3db short stubby antenna. I was able to remove the cover completely and see the wiring inside. I'm unsure if this is what caused the issued but I re-glued the cover down to the base and the radio is back to normal. Thanks to everyone for your suggestions. Glad my radio wasn't toast.
  13. Like
    aa7jc reacted to OffRoaderX in KG1000G not transmitting   
    If a factory reset doesnt clear it up and assuming the antenna is connected and there are no antenna cable issues then my guess is that it is borked..
    Still less than one year old? If so, contact BuyTwoWayRadios and they'll fix you up.
  14. Like
    aa7jc reacted to KAF6045 in GMRS-50X1 Display   
    Nothing in the manual... You may just have to look for the highest contrast background/foreground color pairs that can be set to the fields.
    At least it's an LCD... My Icom ID-5100 appears to have pressure sensitive (ie: it does not use I/R emitters/receivers on the sides of the screen to detect "touch") layer on an e-Ink display (black/white). Even on high brightness it disappears under polarized sunglass (which is not helped in that my prescription when driving is the DISTANCE on, I'd need to put on my computer prescription (fingertip just touches monitor when arm stretched forward) to actually read some of the markings.
  15. Like
    aa7jc reacted to wayoverthere in RT97S wideband operation   
    First, I'll suggest not trusting those other sites ( .io or .report) 100%, as they aren't official sites and I've seen a few glitches in the data...though that doesn't seem to be the issue here.
    Here is the actual doc on fcc.gov...looks like narrow only there...11k0f3e and 5 watts only.
    https://apps.fcc.gov/oetcf/tcb/reports/Tcb731GrantForm.cfm?mode=COPY&RequestTimeout=500&tcb_code=&application_id=46EoA4PpE8zlyRIMY2v7uw%3D%3D&fcc_id=2ASNSRT97
    Here is the main authorization search page https://apps.fcc.gov/oetcf/eas/reports/GenericSearch.cfm
    Perhaps the "wideband" is there for ham use, where they aren't subject to certification testing like they are for gmrs?
     
  16. Like
    aa7jc reacted to KAF6045 in RT97S wideband operation   
    Might be coincidental to them shipping with everything set to narrow band. If the testing agency doesn't dig deeper to learn how to change the default channels (being GMRS with just the 22 frequencies (pairs for the 8 used for duplex) they may have just tested on the presets.
     
  17. Like
    aa7jc reacted to colbypr in RT97S wideband operation   
    I searched it on fccid.io. I also searched it directly through the FCC's website to confirm the information was correct. All you need is the FCC ID which is fairly easy to get. Its listed either on various websites or the retailer's sites. In the case of the RT97S, its listed directly on the mygmrs shopping page as a certified transmitter. It just doesn't seem right that its listed as both wide and narrow but the grant only specifies narrow.  All of the Wouxun GMRS radios I searched have both 11K03FE and 16K03FE emission designators in the grants, but none of Retevis GMRS stuff I searched did, even if it advertised it as narrow and wide capable.
    The link direct to the FCC is here: https://www.fcc.gov/oet/ea/fccid
  18. Like
    aa7jc reacted to colbypr in RT97S wideband operation   
    I was looking at the Retevis RT97S and noticed the specifications listed both narrow (11K03FE) and wide (16K03FE) capabilities. The FCC grant for the device only shows the narrowband 2.5khz designator, 11K03FE.  Has anyone else noticed this? I couldn't find any other grants for their company for the portable repeater that listed the wideband 5khz emissions designator (16K03FE), even though the programming software and literature for the radio clearly let you set Wideband or Narrowband.
    In fact, I checked a bunch of their other GMRS transceivers and none of them appear to have the wideband emissions designator grant, only narrow.
     
  19. Like
    aa7jc reacted to JB007Rules in GMRS Repeater antenna   
    50' of vertical separation is the standard here in Illinois using UHF and 2M VHF.  Some taller towers (figure 500' tall) have 100' of vertical separation for even better RX/TX isolation with RX ALWAYS being on the top.  Many simply invert antennas and that isn't enough in my testing.  It helps to have a folded dipole antenna, NOT a fiberglass stick as they radiate power up into space and down into the earth VS folded dipoles radiate 995% of the power along the horizon and work far better than fiberglass sticks as such and work even better when isolated as mentioned below:
     
    For the commercial towers that my systems are on for the one I use 2 separate antennas with no duplexer.  The sites master RX antennas are at the VERY TOP - 300' and extend upwards to 310 - 320' up depending on the length of them.  All transmit antennas have 50' of vertical separation between the bottom of the RX antenna and the top of the TX antenna.  Breakdown below:
     
    300 - 320' = RX
    DB420 TX is 20' long so it would be mounted at 230' extending up to 250' = 50' between the top of it to the bottom of RX
    DB408 TX antenna is 10' long so it is mounted at 240' extending up to 250' = 50' between the top of it to the bottom of RX

    Hope this helps!
  20. Like
    aa7jc reacted to wojtekweaponry in Greetings from New Hampshire!   
    Hey there! Just got into the GMRS at the beckoning of a stellar friend in Texas and want to reach out to see if anyone in or around Manchester, New Hampshire is active! Seems really quiet around here and the one repeater in town seems to be dead so hopefully that doesn't stop too many people.
  21. Like
    aa7jc reacted to marcspaz in would this work as an antenna tower? Pros & cons   
    If you just stick it in a tripod and don't use guys, in low/zero wind it will hold about 5 lbs max at full extension.  It will not hold much weight at all.  In fact, I was up on Flagpole Knob when some 40 mph winds came through and damn near folded it in half.
    Now, if its guyed with a good tripod, It will easily hold 25-30 lbs.  I use 3 tiers of guys with one set at the top 5 inches.  The guys keep the mast straight under the load for max weight capacity.  I have had my 10' vertical in 80-90 mph winds.  The top of the antenna was moving all over, the the mast didn't budge. 
    The two heaviest loads I have run while fully extended is (1.) a mono-band 20m hex beam with thrust bearings and a rotor at the base, and (2.) a 10' tall 2m repeater antenna, 20m dipole and an 80m inverted V with a balun and choke.  That second setup was in a massive overnight snow storm we had during Winter Field Day a few years ago.
     
  22. Like
    aa7jc reacted to marcspaz in would this work as an antenna tower? Pros & cons   
    Wow!  That's actually really neat... but I personally wouldn't spend that much. 
    The platform is only 17' high.  The shooting rail is the part that is at 20', and the rail doesn't look like it would hold much weight.  You will almost double your range on flat terrain, but we are talking about going from 3.1 miles to 5.9 miles.
    I bought this instead....
    https://mfjenterprises.com/products/mfj-1906h?_pos=25&_sid=bfd1eb1e0&_ss=r
    I get about a 9 to 10 mile radius (in flat/level terrain) with my antenna on this.  A tripod, ground stakes and guy lines, I spent less than $280.   I designed it to be portable, but it can be a permanent setup with zero concerns...  in fact, right now and for the past 3-4 months, it's actually behind my house in the woods being used to hold up my 80 meter HF antenna.
     


     
  23. Like
    aa7jc got a reaction from WRQY383 in Lightning!   
    Has your house or radio antenna ever been hit by lightning?
    We had a violent storm float through here yesterday (in Sierra Vista AZ), and I saw this amazing damage report from someone who lives close by and I thought it was worth sharing here.    BTW, yes about 20 years ago I had a lightning strike that blew up my Comet antenna and when I was a kid in the 1960s lightning hit my tent pole.. Luckily I was not inside the tent but I was close!   Ken WQXQ522
    ".....That VERY LOUD clap of thunder you heard during the thunderstorm tonight was the sound of lightning striking the chimney chase cover on our house (in Country Club Estates)! It traveled down the chimney and blew a hole in our wall."

  24. Like
    aa7jc got a reaction from Huetarded in KG-935G Scan behavior   
    Here is a short clip of my KG935G running a scan and it never stops unless there is a legit signal. 
    My scan has no weather alert or priority..  Make sure those are not enabled. 
    Ken WQXQ522
     

    IMG_1087.MOV    
  25. Like
    aa7jc got a reaction from Huetarded in KG-935G Scan behavior   
    Very strange! 
    You say that if you manually flip from one channel to the next there is zero trace of any silent signals but if you let the radio scan it always finds rogue signals that disappear when you stop the scan...   That is bizarre. 
    I would send a video of this to two way radio or whoever you purchased it from.   
    Too bad you don't have another KG935G to establish a base line.    Good Luck!
    Ken WQXQ522
     
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.