W2MMD's week-long WSPR campaign across North America reveals strong seasonal propagation characteristics typical of late May, with 40m demonstrating the most consistent regional coverage through nighttime and early morning hours, peaking at 227 unique receivers during the 00-03 EDT and 21-24 EDT blocks when the F2 layer supports efficient skywave propagation across the continent. The 20m band emerged as the secondary workhorse, showing remarkable consistency throughout the day with 143 to 227 unique receivers per block, indicating excellent daytime F2 propagation and suggesting the band's reliability during this period despite the advancing season toward summer. The 15m and 10m bands, while more sporadic, displayed the expected solar-dependent signature with 10m activity concentrated in the 18-24 EDT window (59 and 51 unique receivers) and 15m peaking during 18-21 EDT (126 receivers), reflecting the higher critical frequencies achievable during afternoon and evening hours when solar ionization remains elevated; the notably weak 10m performance in the 03-06 EDT block (only 2 receivers) reflects both reduced solar input and the band's natural sensitivity to propagation conditions. The 30m band's relatively consistent performance between 54 and 92 unique receivers across most blocks likely represents NVIS and shorter-skip propagation, though the station's 8:1 SWR limitation to approximately 30mW effective radiated power clearly constrains its reach compared to other bands. Overall, this dataset demonstrates that late-spring propagation favors lower HF bands (40m and 20m) for reliable North American regional coverage, while higher bands require careful timing for optimal results, and suggests that antenna tuning improvements on 30m and power optimization on 10m would substantially improve performance on those bands.

W2MMD's European propagation during this week-long period demonstrates classic seasonal and diurnal patterns, with 40 meters and 20 meters providing the most reliable transatlantic communication paths despite the station's limited power output. The 40-meter band exhibited excellent openings during the evening hours, particularly in the 21-24 EDT and 00-03 EDT blocks where 64 and 38 unique European stations were received respectively, a pattern consistent with near-vertical incidence skywave (NVIS) propagation collapsing as the F2 layer weakens after local sunset and then recovering through the night as European paths strengthen via enhanced ionospheric conductivity. Twenty meters showed sustained activity throughout the afternoon and evening windows (12-15 through 21-24 EDT), peaking at 57 unique stations during 18-21 EDT when the F2 layer remains sufficiently ionized to support mid-latitude transatlantic skip at this frequency. The 15-meter band surprisingly demonstrated strong daytime performance between 09-12 and 15-18 EDT, with peak activity at 37 stations during the 15-18 EDT window, reflecting the heightened solar ionization expected during the local afternoon and early evening hours when the daylight terminator aligns favorably for European reception. Thirty meters and 10 meters proved marginal contributors: 30 meters suffered from the antenna's compromised 8:1 SWR (reducing effective radiated power to approximately 30 milliwatts) and showed negligible activity, while 10 meters produced no spotted connections, likely due to both the Si5351A's reduced output at 28 MHz and the prevailing solar conditions limiting F2 propagation on this highest frequency. Overall, the data underscores that even with modest power from New Jersey, lower H

W2MMD's African reception patterns reveal a predominantly nighttime propagation signature, with 40m and 30m dominating the lower blocks and 20m establishing the most consistent transoceanic path. The 40m band shows peak activity during the 00-03 and 21-24 EDT blocks when near-vertical incidence skywave (NVIS) and gray-line enhancement favor eastward propagation toward Africa, with receptivity dropping to zero during midday hours when the F2 layer ionization is too high for reliable 40m skip over such distances. The 20m band, despite lower peak activity per block, demonstrates more balanced reception across the reporting period with consistent single-station detections from 06-09 through 18-21 EDT, suggesting more stable F2 propagation conditions at higher latitudes during summer months. The 30m band tracks roughly parallel to 40m but with reduced counts reflecting its compromised antenna system (8:1 SWR delivering only ~30mW), while 15m shows encouraging baseline reception of 1-3 stations across nearly every block, indicating that daytime F2 propagation to Africa remains accessible even from this QTH at relatively modest power levels. The sparse 10m results reflect hardware limitations rather than ionospheric conditions, as the Si5351A rolloff at 28 MHz has effectively handicapped this band. Overall, the relatively small receiver population (only six unique stations) suggests that dedicated African WSPR monitoring near the equator remains uncommon, making these propagation observations particularly valuable for understanding trans-Atlantic and trans-hemispheric 40/20m dynamics during the current solar cycle.

W2MMD's propagation to South America during this week reveals a classic pattern of multi-band skip dynamics shaped by solar zenith angle and the ionospheric F2 layer geometry. The 40-meter band dominated contact opportunities with 6 total spots distributed primarily during the dawn and evening hours (00-03 EDT and 21-24 EDT), suggesting NVIS and near-vertical incidence skywave propagation during the cooler portions of the day when the F2 layer was most reflective at longer wavelengths. The 15-meter band proved surprisingly productive with 9 unique stations despite showing broader temporal spread across daylight hours, particularly during the 06-09 EDT, 15-18 EDT, and 21-24 EDT blocks, indicating reliable F2 layer refraction during transitional periods and evening ionospheric conditions. Ten-meter activity concentrated in the 12-15 EDT and 15-18 EDT window with 8 spots, pointing to enhanced propagation during peak solar heating when the F2 critical frequency was optimized for this band; the reduced transmit power from Si5351A rolloff likely limited overall reach but did not eliminate viable skip paths to the southern hemisphere. The absence of any 30-meter detections, despite theoretical propagation potential, reflects the antenna's severely compromised 8:1 SWR effectively reducing that band to ~30 mW, insufficient to compete with the higher-power outputs on other frequencies. Overall, the 200 total spots across seven unique receivers suggest adequate but not exceptional propagation, with 40-meter and 15-meter bands providing the most consistent regional bridges during this early northern summer reporting period.

During the reporting period from 30 May through 6 June 2026, W2MMD's propagation to Oceania demonstrated a distinct diurnal pattern dominated by the lower frequency bands, with 20-meter band activity accounting for the majority of the 328 total spots across 16 unique receivers. The 20-meter band showed robust performance during the early morning hours, peaking with 10 unique stations in the 06-09 EDT block when F2 layer ionization was building in the trans-Pacific corridor, followed by sustained activity in the 00-03 and 03-06 EDT blocks as the band supported long-distance skip paths from the northeast United States toward the antipodean region. Forty-meter band activity, bolstered by its stronger historical data accumulation, showed consistent reception during the nighttime and early morning windows (00-03 through 09-12 EDT blocks), exploiting the extended propagation windows that lower frequency bands enjoy during the local night at both the transmitter and distant receiver locations. The 15-meter band displayed secondary participation with peak activity during the 00-03 EDT window, suggesting marginal but present F2 layer support for this band during the analysis period, while both the 10-meter and 30-meter bands proved largely ineffective—the 10-meter band hampered by the Si5351A frequency rolloff limiting effective radiated power and the 30-meter band severely constrained by its 8:1 SWR reducing output to approximately 30 mW. These results indicate that Oceania propagation from New Jersey during this late spring period is optimized on 20 and 40 meters during the 00-09 EDT transmitter time window, when skip distances and F2 layer geometry favor long-distance trans-Pacific circuits.