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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Z7RRM534F2ZGG7AO5VBFXYW7RRLTXHMR/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "Z7RRM534F2ZGG7AO5VBFXYW7RRLTXHMR", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/IMBN6CJIT5UNE57LDYHTHYHOCPG6VYDP/?format=api", "sender": { "address": "frank.krizan (a) verizon.net", "mailman_id": "fb7fb06d304f4fa580ca8e6c9e977d80", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/fb7fb06d304f4fa580ca8e6c9e977d80/emails/?format=api" }, "sender_name": "Frank Krizan", "subject": "Re: [amsat-bb] Kenwood D72 on SO-50", "date": "2015-07-05T02:57:51Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YHCSEOWG2SJEV77HHMUNHZE7OWUNF3M2/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YV6GX6QYYEWPSKZOPTAC2B4KX36YFSPE/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Philip,\n\nI always use the DUP function for satellite work. And, I always use a headset (ear-bud and mic). The Kenwood HT headset (I have the discontinued HMC-3; the KHS-22 is the current model) has served me well for many years. \n\nFrom the Packet Section of the D72A Manual:\n\"Note:\n\n* When the operating band is Band A, you cannot change to Full Duplex mode.\n\n* When in single band mode, and Band A/B is set to VHF/VHF or UHF/UHF, you cannot change to Full Duplex mode.\n\n* When using the Full Duplex function, connect an earphone to the SP jack. Using an earphone will prevent feedback that can cause the transceiver to emit a howling sound.”\n\n73, Frank K5HS\n\n\n> On Jul 4, 2015, at 21:49, Philip Jenkins <[email protected]> wrote:\n> \n> So, none of you has said a word about turning on the \"duplex\" feature at\n> all.....do I just need to forget about setting it, and just deal with the\n> dual VFOs?\n> \n> Thanks for the great suggestions I've gotten so far. :-)\n> \n> Philip N4HF\n> \n> On Sat, Jul 4, 2015 at 8:55 PM, Frank Krizan <[email protected]>\n> wrote:\n> \n>> For Philip and the group,\n>> \n>> Here’s the suggestion that’s been floating around since 2011. It stemmed\n>> from a discussion with Keith Pugh, W5IU:\n>> \n>> I spent quite a bit of time with Keith Pugh, W5IU, of AMSAT, who also\n>> owns a D72A. We commiserated over the fact that the new radio doesn't\n>> allow for separate PTT and Tune of the A and B bands.\n>> \n>> We'd like to suggest that a future firmware update\n>> offer a RADIO MENU Option for PTT which would toggle through: NORMAL,\n>> A=PTT/B=TUNE, A=TUNE/B=PTT. The Band selected for TUNE would be flagged\n>> with the standard solid \"arrowhead\" and the Band selected for PTT would be\n>> flagged with a \"flashing\" \"arrowhead\".\n>> \n>> This would allow for easier use of the radio for LEO\n>> satellite work, especially when the download needs to be tuned. Right now,\n>> the operator needs to remember what Band is selected and ensure the correct\n>> Band is chosen before changing the frequency, either via VFO or Memory\n>> Channel.\n>> \n>> It's very easy to get confused and change the uplink\n>> frequency and, then, transmit on the downlink. Having separate PTT/TUNE\n>> would make this radio a lot more fun for satellite use.\n>> \n>> Maybe someone’s listening out there who could help.\n>> \n>> 73, Frank K5HS (ex KR1ZAN)\n>> \n>> \n>>> On Jul 4, 2015, at 20:42, Frank Krizan <[email protected]> wrote:\n>>> \n>>> Hi Philip,\n>>> \n>>> I’ve just gotten used to pressing the A/B switch to toggle the PTT/Tune\n>> to the frequency I want to change. It’s a pain. I usually program in\n>> memories for AOS, AOS+, MID, MID+, and LOS. And, once in a while, I change\n>> the wrong channel or transmit on the wrong frequency. I’ve suggested a\n>> firmware change to everyone who will listen to offer a PTT selection and\n>> TUNE selection so the operator doesn’t have to toggle the A/B; but, so far,\n>> no success.\n>>> \n>>> If the D72A could also have smaller frequency steps and the ability to\n>> select which radio (A or B) was designated for PTT and for TUNE, the D72A\n>> would be a great HT for portable use.\n>>> \n>>> From what I’ve been able to determine, you cannot ‘link’ VHF and UHF\n>> memories together to achieve the split function you described. This would\n>> be another firmware option that could offer some convenience.\n>>> \n>>> I love the D72A, and, it’s a shame that to work the [flame off] Easy\n>> Sats, it’s easier to buy a $39 radio than to use a very full featured radio.\n>>> \n>>> Maybe if more folks agreed with the suggestion, Kenwood would listen.\n>>> \n>>> I would also like to see a new HT with a Bluetooth interface to allow\n>> for iOS or Android Apps which could remotely change the frequencies or\n>> channels during a pass. This could also allow for audio interfaces for\n>> PSK-31, APRS, Packet, and more.\n>>> \n>>> 73, Frank K5HS\n>>> \n>>> \n>>>> On Jul 4, 2015, at 20:15, Philip Jenkins <[email protected]> wrote:\n>>>> \n>>>> I bought a D72A a little over a year ago because it had APRS built-in;\n>> this\n>>>> made it very handy for the balloon-chasing I used to do.\n>>>> \n>>>> Now I'm trying to set it up for SO-50. I'm successfully putting it into\n>>>> full-duplex mode - with the 144 Mhz freq (pl 67.0) on the B-band, and\n>> the\n>>>> 435 Mhz frequency on A-band. (Duplex cannot be engaged while the radio\n>> is\n>>>> on the A-band.) I'm running into two problems though.\n>>>> \n>>>> 1 ) Whenever I want to change the receive (downlink) frequency because\n>> of\n>>>> Doppler, turning the knob changes the B-band side, the transmit, which\n>> is\n>>>> what I don't want. As it is, since I can't get the 435Mhz to change,\n>> this\n>>>> setting is only going to allow me to hear the satellite mid-pass\n>>>> \n>>>> 2) I had the idea of putting this/these VFO settings - including duplex\n>> -\n>>>> into memories, one memory for each 5 Khz step on receive. When I follow\n>> the\n>>>> manual directions for entering odd splits in memory, whenever I check to\n>>>> see what's in the memory by transmitting, (it appears) I'm just\n>>>> transmitting simplex on the 435Mhz frequency; the radio's display\n>> doesn't\n>>>> change (other than the s-meter showing that power is being transmitted).\n>>>> \n>>>> I'm wondering how others are making their D72s work successfully on\n>> SO-50.\n>>>> Is/are there (a) certain step(s) that I'm missing in order to change the\n>>>> receive frequency AND enter full-duplex VFO settings into memory\n>>>> successfully?\n>>>> \n>>>> Thanks for the help...either replying to the BB or to me personally is\n>> ok. (\n>>>> [email protected])\n>>>> \n>>>> Philip N4HF EM85\n>>>> _______________________________________________\n>>>> Sent via [email protected]. AMSAT-NA makes this open forum available\n>>>> to all interested persons worldwide without requiring membership.\n>> Opinions expressed\n>>>> are solely those of the author, and do not reflect the official views\n>> of AMSAT-NA.\n>>>> Not an AMSAT-NA member? Join now to support the amateur satellite\n>> program!\n>>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>>> \n>>> _______________________________________________\n>>> Sent via [email protected]. AMSAT-NA makes this open forum available\n>>> to all interested persons worldwide without requiring membership.\n>> Opinions expressed\n>>> are solely those of the author, and do not reflect the official views of\n>> AMSAT-NA.\n>>> Not an AMSAT-NA member? Join now to support the amateur satellite\n>> program!\n>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>> \n>> \n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n\n", "attachments": [] }