During the week of June 10-17, 2026, W2MMD's North American WSPR propagation from Mullica Hill NJ demonstrated classic mid-summer patterns with strong diurnal variation across the HF spectrum. The 40-meter band dominated the dataset with 493 unique stations, showing peak reception during the early morning 03-06 EDT block (117 stations) and maintaining robust activity through midday before collapsing after 18 EDT when the F2 layer ionization diminished—a pattern consistent with groundwave and near-vertical incidence skywave (NVIS) propagation supporting regional coverage. The 20-meter band proved surprisingly productive for summer conditions with 457 unique stations, displaying sustained activity throughout daylight hours with peaks during the 06-09 EDT and 15-18 EDT blocks (106 and 104 stations respectively), indicating reliable F2 layer support across North America during peak solar heating. The 15-meter band, typically challenging in early summer, showed respectable performance with 323 stations and a pronounced midday peak around 09-12 EDT (76 stations) as the F2 layer strengthened, while the short-skip propagation window remained narrow. Despite the antenna SWR limitation reducing 30-meter effective power to approximately 30 mW, this band still produced 196 stations with favorable early-morning and midday performance (50 and 41 stations in the 06-09 and 09-12 EDT blocks), suggesting excellent ground conductivity support for this frequency. The 10-meter band, hampered by transmitter rolloff, showed minimal activity with only 186 total stations, indicating that even during a moderately active solar period this band requires significantly more power or superior propagation conditions to compete effectively from this QTH.

During the week of June 10-17, 2026, W2MMD's Europe propagation showed a distinct daytime pattern dominated by the 15-meter band, which accounted for 7 of the 26 total spots with peak activity during the 18-21 EDT evening window when F2 layer skip distances favor transatlantic paths. The 20-meter band provided secondary openings in the early morning hours (00-03 and 03-06 EDT blocks) with 6 total spots, consistent with the band's tendency to support long-distance propagation during the local night when the D-layer absorption is minimal. Forty meters produced 2 spots exclusively in the 00-03 EDT block, suggesting very limited European accessibility from this location despite the band's historical reliability, while the 30-meter band yielded no European spots—likely due to the antenna's 8:1 SWR limiting effective radiated power to approximately 30 mW. Ten meters showed marginal performance with only a single spot during the 06-09 EDT block, attributed primarily to reduced output power from the Si5351A oscillator rolloff at 28 MHz rather than poor propagation conditions. The clustering of 15-meter activity in the evening hours (18-21 EDT) and the absence of spots during midday blocks (09-15 EDT) suggests that F2 layer ionization patterns were providing optimal skip distances for Europe primarily during the local evening transition, while daytime ionospheric conditions may have pushed the skip zone beyond European receiver range or into higher-angle radiation patterns unfavorable for distant reception.

W2MMD's propagation to Africa during the week of June 10-17 was dominated by early morning 40m openings, with all 64 spots concentrated in the 00-03 EDT and 03-06 EDT blocks when enhanced F2 layer ionization at sunrise along the great circle path to African receivers favored lower frequency skip propagation. The 20m band provided secondary access with 6 total spots distributed across the 00-03 EDT, 03-06 EDT, 15-18 EDT, and 18-21 EDT blocks, suggesting a bimodal pattern consistent with typical gray-line enhancement and afternoon/evening F2 layer recovery typical of June propagation conditions. The 15m band yielded 4 spots concentrated in the 09-12 EDT through 18-21 EDT window, indicating that African reception on this band required higher angle radiation and was limited to periods of robust F2 layer ionization during the middle and late afternoon hours. The 30m band generated no African spots despite its theoretical advantage for NVIS and long-distance propagation, likely due to the compromised 8:1 SWR reducing effective power to approximately 30 mW, while 10m similarly yielded no spots owing to reduced Si5351A output at 28 MHz. With only 3 unique African receivers contributing across the week, the propagation picture remains preliminary and warrants continued monitoring as the station gains operational history, particularly on 40m where the highest spot density suggests the most reliable path exists during the critical predawn EDT hours.

W2MMD's propagation to Oceania during the June 10-17 period was heavily concentrated on the lower HF bands, with 40m and 20m accounting for all 22 spots across just five unique receivers, indicating a limited but consistent opening window. The 40m band dominated with four spots clustered in the early morning hours (00-03 EDT and 03-06 EDT), suggesting that gray-line effects and F2 layer refraction during the pre-dawn transition period provided the most reliable path to the antipodal region, while 20m showed a complementary pattern with five spots occurring during the 03-06 EDT and 06-09 EDT blocks as solar illumination increased. The complete absence of activity on 30m, 15m, and 10m to Oceania reflects both technical constraints and unfavorable ionospheric conditions; the 30m antenna's 8:1 SWR significantly reduced effective radiated power to approximately 30mW, while the Si5351A rolloff at 28 MHz and the general lack of F2 layer ionization support at those frequencies during this reporting period likely prevented any DX reception on the higher bands. The tight temporal clustering of successful spots suggests that Oceania openings were brief and band-specific rather than sustained, with the F2 layer geometry at this season and time of year providing reliable long-distance propagation only during the narrow windows when the great-circle path aligned with optimal skip distance and solar zenith angle. Overall, operators seeking to improve Oceania coverage should prioritize 40m and 20m during the 00-09 EDT window while addressing the 30m feed-line issues and monitoring 15m during peak solar hours, as the current 100mW capability on these lower bands appears sufficient for occasional DX spots under favorable ionosph