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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NUZITE2EN23EZVWH6MBWS5MLVSLJKCXV/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "NUZITE2EN23EZVWH6MBWS5MLVSLJKCXV",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/NUZITE2EN23EZVWH6MBWS5MLVSLJKCXV/?format=api",
    "sender": {
        "address": "amsat-bb (a) wd9ewk.net",
        "mailman_id": "21664df01bef4757931b7cdb42a9e768",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/21664df01bef4757931b7cdb42a9e768/emails/?format=api"
    },
    "sender_name": "Patrick STODDARD (WD9EWK/VA7EWK)",
    "subject": "[amsat-bb] Re: CW from an FM HT",
    "date": "2006-10-28T15:14:35Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "> > Key the PTT line of your UHF FM transmitter for a CW uplink. Turn the\n> > mic gain  down or remove the mike all together.\n>\n> > It will chirp a bit, but it can be copied.\n>\n> If your HT does odd splits and has wide coverage, you might be able to reduce\n> or eliminate this.  Generally, the VFO has to switch from receive to transmit\n> by the amount of the IF.  That's probably where the chirp comes from.  I have\n> not done this experiment with a service monitor to see exactly what happens,\n> but you might try an odd split such that the RX frequency has been shifted by\n> the IF frequency (you might have to try both +/- to see which works for your\n> rig).  Then when you key the rig, the VFO doesn't have shift very far (if at\n> all) and that might make the chirp go away. If you try the experiment, please\n> let me know.\n\nI was doing some testing here at home with this.  I used an IC-W32A and IC-T7H\nwith a straight key plugged into the mic jack on each radio.  Nothing fancy from\nthe key, just an adapter to fit the 3/32\" (2.5mm) jack, and I could key the\ntransmitter.  When I did this, listening on another radio, I could\nhear only the\ncarrier.  No audio was coming from the HTs' built-in mics.\n\nI might try this on FO-29 this evening, and maybe VO-52.  One additional\ndrawback with an HT for a CW transmitter is the fact that most HTs\n(including these two I tried this morning) have 5 kHz as the smallest tuning\nstep.  I also have an FT-817ND, but I only have one of those radios.\nOtherwise, I would be trying all of this with a pair of FT-817s and making\nsome CW and SSB contacts.\n\n73!\n\n\nPatrick WD9EWK/VA7EWK\nhttp://www.wd9ewk.net/\n",
    "attachments": []
}