In the month of March there is a chance to reach a new band point on Wednesdays. DL2025E will be heard and operated on 630 meters. On Wednesdays, March 5th, 12th, 19th and 26th, 2025, Helmut (DL6KWN) will be using the call sign DL2025E promptly at 20:00 UTC for at least 10 minutes (see also NOTE below) on 630 meters.
(to check, watch the ON-AIR spot on this website or on QRZ.com!)
Helmut – who is also the Chief OP of DL0MCM/Traditionsschiff from the traditional ship “Frieden” in Rostock – will be using a ship distress transmitter (500 kHz is the calling and distress frequency) on 473,7 kHz .
TX: ship radio emergency transmitter SNS 577, built in 1970
RX: Restored emergency receiver Dabendorf, Audion / 1-V-2 with battery tubes of the D series “… with amazing sensitivity”. For comparison, an IC-7410.
ANT: original ship antenna of the MS “Dresden” = L-antenna in 2-wire design at about 32 m above water. Distance between the horizontal wires about 4-5 m. Horizontal length about 30 m, the vertical part runs slightly diagonally and is about 17 m long. At the lower end, the two wires are brought together before entering the antenna shaft at a height of about 19 m. (Info DL6KWN)
This 630 meters offer was already well received at the 100FK radio event. It is exciting to achieve range in this lower medium wave range with the simplest technical equipment. 630 m is also particularly attractive in the context of 2025C, because the award program is based on the operators’ enthusiasm for experimentation. Particular attention is paid to the antenna. (λ/2 = 300 m!)
On the subject of 630m, a few DIY ideas for antenna, converter and TX: (1) (2) (3)
Most HF-TRXs can be used as receivers, as they usually start at 30 kHz on the receiver side. Plus a simple L-antenna + charging coil…!? We look forward to hearing about your experiences!
630m antenna
Optimistic SELF-TEST: RX of my Kenwood TS480 + 80m loop at 8m height = SM4WII/B with S4 QSB on 476 kHz /QRB 726 km … 630m currently in the cluster
Every call is welcome (in 2024 at 100FK there were 6 call signs) and especially audio (SWL) reports are expressly desired! We are happy to receive any experience report – on 630m tinkering as well as an audio recording of the DL2025E you have heard. Please send an email to 
or to Helmut DL6KWN directly (see QRZ.com).
NOTE: There are probably not many stations on this somewhat exotic band, so the call will be aborted after 10 minutes of unsuccessful CQ calls (after the last QSO).
