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Amateur (Ham) Radio BS and Callsign Thread!

Discussion in 'Sports, Hobbies & Interests' started by The Traveler, Jan 29, 2013.

  1. Feb 1, 2020 at 8:06 AM
    #6461
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    Unexceptional
    The ack he's talking about is done automagically by the client receiving the message, at least if the protocol is fully implemented. Status and Posit packets are sent with no expectation of an ack packet but message packets are sent and will retry until either it receive an ack from the recipient or it times out.

    Fun fact, the example message he's using shows my station sending the "ack2" and in that case the client is Xastir over the Internet directly (TCPIP, not RF).

    Typically this is a finite number generally with decaying delay. IOW you hit send the message packet is transmitted immediately (or as soon as the TNC/client detects it's OK, they sometimes watch squelch to clear) and then some number of times following some delay algorithm.

    For example my Argent Tracker3 is set to a 120 second delay with a limit of 7. So that means it sends at most 8 packets at intervals of 0 (first packet), then 2 minutes later, then 4 minutes after that one, then 6, 8, 10 and finally a 12 minute delay. If it has not heard an ack packet by the last one (which I think is 38 minutes later) that message is assumed to be undelivered. I've experimented making that 30, 60 and 90. None of them are really ideal compared to an actual operator sending a message. If the network hasn't transported an ack in the first few minutes it's not really worth letting it ping away indefinitely.

    In that time the person you sent the message to may have actually composed a response message that implicitly acknowledged your original message in fact got through but to the network his station for whatever reason wasn't configured to send an ack or the network or your client never heard it.

    In a local network of all RF stations this I find is not usually the case, ack packets usually work. It's when sending messages over a digipeater they are sometimes mistimed or experience collisions. Worse yet is when it has to traverse APRSIS and the Internet there's so many more opportunities for a packet to end up in the bit bucket that waiting
     
    Last edited: Feb 1, 2020
  2. Feb 1, 2020 at 3:25 PM
    #6462
    Sand Dog

    Sand Dog Well-Known Member

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  3. Feb 2, 2020 at 8:35 AM
    #6463
    joshuajayg

    joshuajayg Well-Known Member

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    TM-V71A, Larsen dual-band antenna, NMO roof mount, Factory mic cable.
    Some people have indicated my signal drops out and gets very staticy while transmitting. I was having a conversation with a guy last night, truck was off, and he said part way through my transmission it would sound like frying bacon. It wasn't consistent, it would go in and out. Tried all three power settings (5w, 10w, 50w.) I figured maybe the transceiver was reacting to bad SWR but with transmitting only 5w, that doesn't seem to be the case.

    Did some google-fu and others have identified the same issue as the mic cable RJ-45 connector being finicky. My cable is under tension when I am using it. Anyone have a source for a longer mic cable? I don't want an "extension"; I would like a longer coiled cable. It is a special cable with the voice wires shielded. Maybe I should just do a strain relief off the radio body and wedge the connector so it doesn't wiggle in the mic?
     
    k8md likes this.
  4. Feb 2, 2020 at 8:41 AM
    #6464
    m603holden

    m603holden @Koditten Pirate Radio member #063

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    I believe the hack is to buy your own shielded cable and swap the pinout to the right order on the plug so you don't get the clocking issue
     
  5. Feb 2, 2020 at 8:44 AM
    #6465
    joshuajayg

    joshuajayg Well-Known Member

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    I have shielded CAT-5 (CAT-6E?) cable at home, RJ-45 connectors, and a crimp tool. Guess it wouldn't hurt to try. I thought the audio cables were shielded from the rest of the wires. Maybe just making the voice and voice ground a twisted pair will be sufficient.
     
  6. Feb 2, 2020 at 8:56 AM
    #6466
    m603holden

    m603holden @Koditten Pirate Radio member #063

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    The whole issue is the Mic and data line being put right next to each other. There's bibles worth of posts a out guys saying "oh mind works fine" and then a few months later you'll have reports of woody the wood pecker on tx.

    Here's one suggestion to make an extension for the stock cable.


    ~~~~~~~~~~~
    1- no connection
    2- DC 8V, 100mA max
    3- GND
    4- PTT
    5- GND (MIC)
    6- Mic, 600 impedance
    7- No Connection
    8- Keypad serial data

    Read on the Yahoo group for the 71A that a flat cable would put more separation between the serial line and the mic line and would help reduce/eliminate the motorboating. Seems to work on mine. Radio mounted in front of console in my ranger. Mic cord was obviously not gonna last long as much as it was getting stretched(also pulling on connector). An 18 inch piece of flat CAT5 secured midway to eliminate pulling on connector also provided just enough extra to make mic cord long enough. 3 fixes in one, not pulling on connector, added link and separated the critical wires. It seems to have worked on mine. Funny thing, I had the radio a year before it started motorboating.


    ~~~~~~~~
    I forget which one it is, but folks also separate one of the lines completely and shield it externally to help the issue. It's not external rf or common mode down the line. It's an internal thing.

    Frank KK4YTM
     
    joshuajayg likes this.
  7. Feb 2, 2020 at 10:03 AM
    #6467
    vssman

    vssman Rocket Engineer

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    I have a V71a and use a straight piece of CAT6 cable about 4’ long. Crimped my own ends too. No issues at all for about 1 1/2 years with daily usage. Yes, there’s an issue with the mics themselves but I haven’t had any yet. A local that I talk to uses his V71a at home with a 25’ cat cable so that he can sit in front of the TV and yack on the repeater. No issues either and he’s used this set up for quite a few years (10ish). Maybe it’s the quality of the crimps or cable?
     
  8. Feb 2, 2020 at 2:03 PM
    #6468
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    Unexceptional
    The Kenwood cables do have a mini coax for the mic (pin 6) and ground (pin 5) next to it but even Kenwood had some counterfeits I guess sneak in that were just straight cables. Unshielded Ethernet cable should work, at least better than a straight through cable, as long as you make sure the mic and ground are on the same twisted pair. It's better if the mic line is shielded, though.

    The problem in my case was with DTMF mics. It seems to want to couple switching noise from that on my mic line. It went away completely when I used a plain non-DTMF mic anyway.

    81w0cVe3H+L._SL1500_.jpg
     
  9. Feb 2, 2020 at 5:28 PM
    #6469
    k8md

    k8md Well-Known Member

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    When making your own cable extension for Kenwood mics, don't use a standard Ethernet pinout. Pair 1/2, 3/4, 5/6, 7/8 instead.

    @joshuajayg you should definitely strain relief the connector. I have my mics come under the front seat. I zip tied the mic cable to the bar that adjusts the front/back. So when I tug on the mic there is no tension on the connector.
     
    m603holden likes this.
  10. Feb 3, 2020 at 1:14 PM
    #6470
    Atomic

    Atomic Master Cylinder

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    I posted earlier about my beginnings into ham. This is the transceiver I am looking at buying because I wanted FM, DMR and APRS as well. Any comments on this one would be appreciated:

    https://youtu.be/3pWIfwBtsEE
     
  11. Feb 3, 2020 at 1:29 PM
    #6471
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    One thing to note about the Anytone AT-D578UV is that the face does not (and AFAIK can't be hacked to) separate from the body, which might be a significant issue for mounting mobile. It does seem to check all the boxes otherwise and I think people have been satisfied with the performance of it and the HT versions (AT-868 & AT-878) that it derives from.
     
    Kheiron, Gunshot-6A and m603holden like this.
  12. Feb 3, 2020 at 8:45 PM
    #6472
    Realoldfatguy

    Realoldfatguy Well-Known Member

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    I have been looking at that one as well. It’s $400 and the Icom ID-4100 is just under that. Debating between those two.
     
  13. Feb 3, 2020 at 10:16 PM
    #6473
    Cali. Camper

    Cali. Camper Well-Known Member

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    Hey folks, just got my Tech license KN6GYX hope to get in contact with ya! I just ordered the yaesu FT-8900r. Diamond four band cr 8900 antenna. I will be ready to pimp some watts by next week!
     
    medic2230, Cudgel, Sand Dog and 4 others like this.
  14. Feb 3, 2020 at 10:18 PM
    #6474
    Cali. Camper

    Cali. Camper Well-Known Member

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    I didnt want to get into digital yet too much work/info plus you need wifi/internet connection that means another monthly payment.
     
  15. Feb 4, 2020 at 2:10 AM
    #6475
    k8md

    k8md Well-Known Member

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    That's a large antenna. Make certain it has a stout mounting point and avoid tree branches.
     
  16. Feb 4, 2020 at 2:11 AM
    #6476
    k8md

    k8md Well-Known Member

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    Wut?

    Why do you need WiFi/internet for any digital mode? Ft8 does require accurate time, but you don't need internet for that.
     
    DaveInDenver likes this.
  17. Feb 4, 2020 at 2:35 AM
    #6477
    m603holden

    m603holden @Koditten Pirate Radio member #063

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    Thats only if you're going to have a hot spot device and access the digital networks that way.

    There are repeaters that use digital modes which are strictly radio frequency.
     
  18. Feb 4, 2020 at 3:55 AM
    #6478
    golfindia

    golfindia Well-Known Member

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    6m FM is a lonely place.....
     
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  19. Feb 4, 2020 at 5:25 AM
    #6479
    m603holden

    m603holden @Koditten Pirate Radio member #063

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    :rofl:. That it is.


    The only use we have for 6m FM is there's a 6m repeater up hear that has good coverage into the north country and is linked to 2m/70cm
     
  20. Feb 5, 2020 at 11:29 PM
    #6480
    Cali. Camper

    Cali. Camper Well-Known Member

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    Ok thanks i just heard that about 6m last night and i know about the hot spot but wondering if it could function off my sprint hot spot with no additional charge?
     

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