It has been sometime since I bought the MDT40  (Minimalist Double Sideband Transceiver) kit
from OZQRP.

Progress has been slow due to family commitments. But slowly it is now starting to take shape:


Hopefully in a few weeks time I will have it all boxed and complete.
Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

This past weekend's CLE saw noticeably improved conditions compared with the previous event.





With the fall DX season fast-approaching, the combination of diminishing thunderstorm activity and improved propagation provided some interesting catches. Friday night was the best with Saturday having a brief period of favorable prop, while no new stations were heard on Sunday night, the poorest.

It was particularly nice to hear strong signals from the eastern provinces on Friday, highlighted with an excellent signal from 'JT' (390 kHz) in Stephenville, Newfoundland. This long haul east-west propagation can only be found with quite geomagnetic conditions as was the case on Friday.


After examining the geomagnetic 'K' data for Saturday (25th), it's interesting to note that the four catches for that night all coincided exactly with the brief green bar (K= 0-3) centered on the hours around 0900 UTC (circled).

The following NDBs were heard using my Perseus SDR and 'inverted-L' resonated to ~ 300kHz:

               24 06:30 385.0 WL Williams Lake, BC, CAN
               24 13:00 385.0 OCC Yakutat, ALS
               24 10:00 385.0 MR Pacific Grove, CA, USA
               24 13:00 385.0 EHM Cape Newenham, ALS
               24 08:30 386.0 SYF St. Francis, KS, USA
               24 06:30 386.0 HAU Helena, MT, USA
               24 06:00 386.0 4N Oxford House, MB, CAN
               24 06:30 388.0 MM Fort Mc Murray, AB, CAN
               24 09:30 388.0 JW Pigeon, AB, CAN
               24 06:30 388.0 GLY Clinton, MO, USA
               24 06:30 389.0 YWB Kelowna, BC, CAN
               24 08:00 389.0 TW Twin Falls, ID, USA
               25 08:30 389.0 EN Kenosha, WI, USA
               24 06:00 389.0 CSB Cambridge, NE,USA
               24 06:30 390.0 JT Stephenville, NL, CAN
               24 06:00 390.0 HBT Sand Point, ALS
               24 06:00 390.0 AES Northway, ALS
               24 06:30 391.0 TK Telkwa, BC, CAN
               24 13:00 391.0 EEF Sisters Island, ALS
               24 06:00 391.0 DDP Dorado, PTR
               24 06:30 391.0 4W Kelsey, MB, CAN
               24 08:30 392.0 ZFN Tulita, NT, CAN
               24 06:00 392.0 PNA Wenz, WY, USA
               24 06:30 392.0 ML Charlevoix, QC, CAN
               25 08:30 392.0 FMZ Fairmont, NE, USA
               25 08:30 392.0 BAJ Sterling, CO, USA
               24 06:00 392.0 AGZ Wagner, SD, USA
               25 09:30 393.0 TOG Togiak, ALS
               24 08:30 393.0 2M Opapimiskan Lake,ON, CAN
               24 13:00 394.0 RWO Kodiak, ALS
               24 08:30 394.0 DQ Dawson Creek, BC, CAN
               24 08:30 395.0 YL Lynn Lake, MB, CAN
               24 06:00 395.0 ULS Ulysses, KS, USA
               24 08:30 395.0 L7 Estevan, SK, CAN
               24 08:30 396.0 YPH Inukjuak, QC, CAN
               24 13:00 396.0 CMJ Ketchikan, ALS
               24 08:30 397.0 ZSS Saskatoon, SK, CAN
               24 08:00 397.0 SB San Bernardino, CA, USA
               24 08:00 397.0 CIR Cairo, IL, USA
               24 08:30 398.0 YOD Cold Lake, AB, CAN
               24 08:30 398.0 3D Cumberland House, SK, CAN
               24 08:30 399.0 ZHD Dryden, ON, CAN
               24 13:00 399.0 SRI St George, ALS

The results from all participants can be found at the NDB List website, or if you are a member of the ndblist Group, results have also been e-mailed and posted there.

The very active Yahoo ndblist Group is a great place to learn more about the 'art' of NDB DXing or to meet other listeners in your region. There is a lot of helpful information available there and new members are always very welcome. As well, you can follow and chat with other NDB chasers regarding antennas, techniques, unidentified signals and  nightly propagation.

Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

Amateur Radio Weekly is curated by Cale Mooth K4HCK. Sign up free to receive ham radio's most relevant news, projects, technology and events by e-mail each week at http://www.hamweekly.com.

High levels of geomagnetic activity have usually, but not always, been the kiss-off-death for LF/MF propagation.

These past few months have seen fairly regular field disturbances, often pushing the K index to a level '5' or higher. However, while usually attenuating the east-west and northerly polar paths, the Trans-Pacific path often seems to benefit from these events ... particularly last night.


Perhaps it is related to the equinox's normal preference for this path or maybe the goop the sun is sending us at this point in the cycle is different or not as energetic as it is at mid-cycle. Nevertheless it's really encouraging to see that not all disturbances are detrimental to LF propagation.

For a daily summary of all overnight activity and much more, see KB5NJD's '630m Daily Reports'.

The WSPRnet map reproduced below shows the extent of reception during my own overnight WSPR 630m beaconing session. Missing are many of the normal spots from the eastern provinces and east coast states, indicating the attenuation on this path. Everything else seems enhanced.

courtesy: WSPRnet

The path to down under, in-spite of my obstruction in that direction, perked-up as well, with VK4YB decoded here 19 times as well as VK3ELV's 150W and inverted-L near Wangaratta, Victoria.


               13:56      VK4YB      0.4756      -28   QG62ku   11820      
               13:50      VK4YB      0.4756      -28   QG62ku   11820      
               13:44      VK4YB      0.4756      -24   QG62ku   11820      
               13:40      VK4YB      0.4756      -24   QG62ku   11820    
               13:30      VK4YB      0.4756      -27   QG62ku   11820      
               13:24      VK4YB      0.4756      -20   QG62ku   11820      
               13:18      VK4YB      0.4756      -24   QG62ku   11820    
               13:12      VK4YB      0.4756      -22   QG62ku   11820    
               12:42      VK4YB      0.4756      -26   QG62ku   11820    
               12:14      VK4YB      0.4756      -20   QG62ku   11820    
               12:02      VK4YB      0.4756      -23   QG62ku   11820    
               11:58      VK4YB      0.4756      -25   QG62ku   11820    
               11:52      VK4YB      0.4756      -25   QG62ku   11820    
               11:40      VK4YB      0.4756      -29   QG62ku   11820      
               11:32      VK4YB      0.4756      -26   QG62ku   11820    
               11:24      VK4YB      0.4756      -25   QG62ku   11820    
               11:12      VK4YB      0.4756      -22   QG62ku   11820    
               10:56      VK4YB      0.4756      -26   QG62ku   11820    
               10:54      VK4YB      0.4756      -25   QG62ku   11820


Merv, WH2XCR in Hawaii, was spotted here 56 times, with numerous transmissions at 'easy CW' levels. He even spotted me twice, with his 80m dipole, presently laying on the ground!

It was also encouraging to see 21 spots from Eden, ZF1EJ in the Cayman Islands, with several at CW levels.

The following stations all uploaded spots of my overnight WSPR signals, as nightly activity continues to grow with the DX season now at the doorstep. Given equal ERP, most of these stations would be workable on either CW or on JT9.

              WH2XGP      DN07dg      319      122
               WG2XSV      CN85sr      353      169
               WI2XJQ        CN87ts      138      150
               NO1D         DM34tn      1825      147
               N3IZN/RX  DM13ji      1796      161
               WW6D      CM88pl      1155      177
               VE7CNF      CN89ng      55      33
               VA7MM      CN89og      59      38
               WE2XPQ      BP51ip      2151      321
               W5EMC      EM10cl      2963      124
               K5ACL      EM10bd      2987      125
               WG2XXM    EM15lj      2610      115
               ZF1EJ/1       EK99ig      4977      116
               KE7LGT      DN26xm      739      107
               W3PM       EM64or      3365      104
               ZF1EJ        EK99ig      4977      116
               VE7KPB      DN29cm      550      79
               KU7Z        DN41af      1227      129
               WH2XCR      BL11je      4295      236
               KB0BRY      EN17nc      1966      86
               WD2XSH/20 CN83      598      178
               WG2XIQ      EM12      2841      120
               WE4X      EM65ut      3326      102
               VE7BDQ      CN89la      26      44
               KB7W      CN93jx      565      163
               W6LEO      DN17oq      498      103
               WH2XAR      DM33vp      1924      147

As interest in 630m continues to expand, many U.S. amateurs are already building their stations so they will be ready to go when the word finally comes. I suspect that 630m may soon sound like a small slice of 40m on a busy night ... will you be ready?
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

Got this great tip from Larry KG4ZAR:

Every ham seems to have a HT or two in their shack and sooner or later they find the rubber duck antenna loose.

Most times it’s the locking ring/nut on the chassis mount that’s worked loose. If you use one of the improved 1/4 wave aftermarket antennas, this becomes a more frequent problem.

Trying to tighten up this ring (especially on one of the Chinese radios) usually means grabbing a pair of needle nose pliers and making a mess of things, along with pinching your fingers when the pliers slip off the ring.

A much simpler way to tighten these rings is to purchase a cheap set of “snap ring pliers.” A set of these pliers (with various interchangeable tips) are under $10 at Harbor Freight and you’ll find many other uses once you own a set.

Matt Thomas, W1MST, is the managing editor of AmateurRadio.com. Contact him at [email protected].