Welcome to the shack. This page runs live propagation data, a real-time greyline map, a satellite tracker, a Morse code trainer, and a DX log — because a QRZ bio page is fine, but it isn't fun.
Band Conditions
Solar-terrestrial data and HF band condition estimates, proxied live from N0NBH's feed.
Greyline Map
The day/night terminator, redrawn from the real solar subpoint. Grey-line propagation along this line can open surprising long-haul contacts on low power.
Satellite Tracker
Click a satellite below to track its live position, computed from current orbital elements. Always check AMSAT's status page before a pass — satellite operational status changes.
| Satellite | Uplink | Downlink | Mode |
|---|---|---|---|
| ISS APRS digipeater | 145.825 MHz | 145.825 MHz | APRS / Packet |
| SO-50 | 145.850 MHz (67.0 Hz CTCSS) | 436.795 MHz | FM |
| AO-91 (Fox-1B) | 435.250 MHz | 145.960 MHz | FM |
AO-92 (Fox-1D) has decayed and is no longer operational, so it's left off this list.
Grid Square Finder
Click the map, drop in coordinates, or use your own location — get the Maidenhead grid, plus distance and bearing from W4SDI (EM63tn).
DX Log Map
Every logged QSO, plotted as a great-circle path from EM63tn.
Morse Code Trainer
Type text to hear it in CW, or try the callsign copy game.
Text → Morse
Callsign Copy Game
Listen to a random callsign in CW, then type what you copied.
Answer: ??????
Band Plan & Ham Jargon
Quick reference — always double-check current FCC Part 97 sub-bands before operating, these shift occasionally.
| Band | Frequency Range | Typical Use |
|---|---|---|
| 160m | 1.800 – 2.000 MHz | Winter DX, local nets |
| 80m | 3.500 – 4.000 MHz | Nighttime regional/DX, nets |
| 60m | 5 channelized freqs | General+, channelized use only |
| 40m | 7.000 – 7.300 MHz | Day/night regional & DX |
| 30m | 10.100 – 10.150 MHz | CW & data only, no phone |
| 20m | 14.000 – 14.350 MHz | Workhorse daytime DX band |
| 17m | 18.068 – 18.168 MHz | DX, less crowded |
| 15m | 21.000 – 21.450 MHz | DX during solar peaks |
| 12m | 24.890 – 24.990 MHz | DX, sunspot-dependent |
| 10m | 28.000 – 29.700 MHz | DX & FM repeaters when open |
| 6m | 50 – 54 MHz | "The Magic Band" — sporadic-E |
| 2m | 144 – 148 MHz | FM repeaters, satellites, APRS |
| 1.25m | 222 – 225 MHz | Regional, lightly used |
| 70cm | 420 – 450 MHz | FM repeaters, satellites |
Q-Codes & Jargon
Random Ham Radio Fact
Click the button for a fact.
Gear
What's on the bench.
About W4SDI
I'm Nathan — first licensed in 2012 as KK4IJF, and I picked up the vanity callsign W4SDI in 2022. I hold a General class license and operate from grid EM63tn. This page is basically an extension of the shack — propagation data, a greyline map, satellite tracking, and a DX log live here because a static bio page is no fun. Find me on QRZ.