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QSL: LoTW

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Ham Member Lookups: 3852

 

How to submit SAT QSOs to LoTW

Unlike terrestrial QSO, you must add to each record some specific info: propagation mode and satellite name. This could be done automatically with your logging software if it has possibility to log SAT QSOs. Otherwise you must edit ADIF with your preferred ADIF editor or even manually with your preferred text editor. Check each record and add to it if needed:

<PROP_MODE:3>SAT – exact propagation mode to distinguish satellite QSO from terrestrial or any other special mode

<SAT_NAME:5>SO-50 – obviously it must match for both parties

To avoid discrepancy, LoTW accepts only one name for each particular SAT. Use SO-50 for Saudi-OSCAR 50 or AO-85 for Fox-1A and so on. Actual list can be found in config.xml; TQSL will update it with new birds on the sky.

Please note that you must state your TX frequency, not RX! RX band and/or RX frequency may present in the record; it won’t affect confirmation anyway. Just be sure not to swap RX and TX in your log. This is common error that leaves many QSOs unconfirmed.

Example of an essential record to be successfully submitted to LoTW and confirmed with other party:

<CALL:5>UT7UX – the station you worked

<QSO_DATE:8>20161231 – year, month and day when it happened

<TIME_ON:6>235959 or <TIME_ON:4>2359 – it isn’t necessary to count each second

<BAND:4>70CM – your TX band, not RX

<MODE:2>FM – easy!

<PROP_MODE:3>SAT – yep

<SAT_NAME:5>AO-85 – not AO85 nor Fox-1A

<EOR>

Any other info is optional and won’t affect submitting and confirming.


ID-51: VOX for APRS

I hate Icom’s not HAM friendly policy but if you want to try D-Star you had no big choice before the TH-D74 from Kenwood was finally released and thus you could get an ID-51 and found that there is no APRS on it. Don’t let to be fooled: D-PRS is not the APRS at all. However you may be told by someone that for casual APRS operations you don’t need a real TNC and you may just simply connect your any VHF radio to a phone (or to PC) with an almost no-cost homebrew cable. Yes, it is true. TNC will be software emulated on a phone (or on PC) and should work fine. You just need the VOX in your radio to start transmitting. ID-51 has built-in VOX but wait! The VOX does not work! To activate VOX you must purchase an adaptor from Icom for about $30! For about same $30 you may buy a chinese dualbander with working VOX!

If you aren't going to sell your ID-51 and to buy a $30 radio HAM friendly radio from Kenwood (like TH-D74), the solution is very simple: just add one resistor!

Circuit description.
Resistors R1, R3 and R4 are used to reduce audio level from headphone outputs to microphone inputs. Exact resistance may vary depending on your phone and radio volume control so these resistors are not absolutely needed. A pair of R3 and R4 used to isolate left and right audio outs and also aren’t exactly necessary. However, better design requires potentiometers to set the attenuation correctly.
Capacitors are used to break DC from microphone power supplies.
Resistor R5 is needed for the phone to recognize a headset. Recommended resistance is 2k2 but no great tolerance is required for most phones.
Resistor R2 is needed for the radio to recognize your cable as a genuine $30 adaptor and finally to allow the VOX. Any amount from 51k to 62k should work fine, 56k is recommended.
Transformers are an overkill for portable but still are a good idea to get the galvanic isolation if you’re going to connect the radio to a PC, not to a phone only. I’ve used common “audio 1:1” transformers.

On the radio side there are two TRS connectors. Thinner 1/10” is used as audio in. Tip is for signal, sleeve as a ground. Ring not connected; there is 3V power out from the radio to external devices so never connect ring to mic in or to ground. Thicker 1/8” is used as audio out and for VOX. Tip is audio out, sleeve is a ground. Ring is used to enable VOX.

On the phone side there is one TRRS connector. Tip and first ring are left and right audio out respectively. Second ring is ground. Sleeve is a mic in. Note that some phones are using classic pinout where second ring is mic in and sleeve is ground: in that case just swap mic and ground. There is no restriction to make two or even more cables in parallel for different devices however I’m pretty sure the better idea is a TRRS female jack and some custom cables for your particular equipment.


 

8253694 Last modified: 2017-08-04 09:17:05, 5256 bytes

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DX World Award#5397
Granted: 2017-04-21 21:48:02   (UT7UX)

Endorsements:
  • 20 Meters Mixed
  • Mixed Phone
Grid Squared Award#15580
Granted: 2017-03-25 18:34:02   (UT7UX)

Endorsements:
  • 20 Meters Digital
  • Mixed Digital
  • 20 Meters Mixed
  • 40 Meters Mixed
  • 20 Meters Phone
  • 40 Meters Phone
  • Mixed Phone
World Continents Award#17067
Granted: 2017-03-24 22:08:02   (UT7UX)

Endorsements:
  • 10 Meters Mixed
  • 20 Meters Mixed
  • 30 Meters Mixed
  • 40 Meters Mixed
  • 10 Meters Phone
  • 20 Meters Phone
  • 40 Meters Phone
  • Mixed Phone
  • 20 Meters Digital
  • 30 Meters Digital
  • 40 Meters Digital
  • Mixed Digital
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