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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZSHYZ2ZB6TVP52ZQ4G53YHXNBD7REYWL/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "ZSHYZ2ZB6TVP52ZQ4G53YHXNBD7REYWL",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZSHYZ2ZB6TVP52ZQ4G53YHXNBD7REYWL/?format=api",
    "sender": {
        "address": "hans.bx2abt (a) msa.hinet.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Hans BX2ABT",
    "subject": "[amsat-bb] Sequencer advice needed",
    "date": "2020-03-06T12:23:25Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WQKHLBUSFOL3R5UJD43OAJ7WQXEQUYBX/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I haven't worked with sequencers before as all my LNAs and SDRs have \nbeen used for receive only. But now that I have a Airspy HF+ I want to \nget going with APRS on 145.825 and use this on HF as well. So receiving \nwith the SDR, transmitting with a transceiver. I also want to experiment \nwith LNAs, so another reason to use a sequencer. I did a lot of \ngoogling, learned some, but still not sure what I need to look out for \nwhen buying one. I prefer a kit or assembled product as a first try.\n\nBelow is a list of what I found on line. From a distance the VHF Design \nis cheap and has detailed information, so I am leaning towards \npurchasing that. Later, for a DIY project, I like the OZ1BXM design \nbecause it uses an Arduino for control, which brings some flexiblity.\n\nCan you all please give me some input on what to look for in sequencers \nor comment on the choices below? Any other kits/assemblies I have missed \nand should be considered? Cheers,\n\nHans\nBX2ABT\n\n\n\nMinikits from Austalia's EME166: AU$45 (=US$27.75)\n\nhttps://www.minikits.com.au/Sequencer?search=Sequencer\n\nThis is the only one that indicates a frequency range: 28 to 500 MHz, so \nthis will cover the 2m band, but not HF. Also RF input is 4 Watts \nmaximum, which seems low, so how is this usable?\n\n\n\nW6PQL's sequencer (US$20 for kit, US$37.50 assembled)\n\nhttp://www.w6pql.com/relay_sequencer.htm\n\nNo info on frequency range or input power. Not much info on the website.\n\n\n\nVHF Design (US$20 assembled)\n\nhttps://vhfdesign.com/other/sequencer-pcb.html\n\nWebsite has good information, diagrams and PCB layouts. Again no info on \nfrequency range, etc.\n\n\n\nDowneast Microwave (US$25~80)\n\nhttps://www.downeastmicrowave.com/searchresults.asp?Search=sequencer&Submit=\n\n3 and 4 step sequencers both in solid state and with relays based on a \ndesign by W5LUA. Which better: solid state or relays? Little indept info.\n\n\n\nG3SEK - (DIY)\n\nhttp://www.ifwtech.co.uk/g3sek/dx-book/sequencer/\n\nBasically only a schematic, so need to build it from the ground up.\n\n\n\nOZ1BXM (DIY)\n\nhttp://oz1bxm.dk/seq/sequencer.html\n\nAnother DIY project based on the W6PLQ design. This uses an Arduino as \nMCU, so should be flexible. No kits and no PCB designs.\n\n\n\nSM2CEW (DIY)\n\nhttp://sm2cew.com/sequencer/sequencer.html\n\nThis one looks very simple to make with very few components. It was \ndesigned for HF, so will it work on VHF?\n\n\n",
    "attachments": []
}