JA/KN-006
Original: Ryota / JJ1WTL — 515378008 · Original Japanese HTML
Published: 2025-05-20
English translation of the archived article text. The author’s first-person observations, uncertainty and later additions are preserved; this is not the research summary. Image contents are preserved as images, not silently incorporated into the translated prose.
Mount Oyama. Sunday, May 18. The longest-distance contact was Kashima City, 139 km away. 430 MHz FM, 1 W.
[Red line added to the distance and bearing calculation: https://vldb.gsi.go.jp/sokuchi/surveycalc/surveycalc/bl2stf.html.]
Shinkansen maintenance vehicles
At Tamachi Station. Two sets withdraw towards Shinagawa one after another. Photographed 4:33–4:36.
Outward journey
Tamachi 4:39 → Shinjuku 5:02 / 5:27 → Isehara 6:24 / 6:35 → bus → Oyama Cable 7:00. The first clockwise Yamanote Line train.
Changing at Shinjuku.
Arrived at Isehara. A distant view: in the clouds. orz.
Perhaps twenty people waiting for the bus… Got a seat.
To Oyama.
The climb
Setting off at 7:17. The cable car is not running yet, so walking up.
Map showing the location within Isehara City.
Enlarged.
Choosing Otokozaka: endless stone-stair hell. If you can sustain a pulse of 120–140 for thirty minutes, turn right.
Reached the shrine at 8:08. It is clearing up. Taking the cable car lets you skip the climb to this point.
But these stairs cannot be avoided. Mandatory.
At the summit and its marker. Haze obscures the world below. 9:46.
On the air
After wandering around, opening for business. An iron pipe stuck out of the ground, so I tied my trekking pole to it. Operating as ‘/1, Atsugi City’ for about forty minutes.
Descent
Returning by the same route. Started down at 11:40. Taking Onnazaka on the return. This is where I emerged, at the junction with Otokozaka.
The bus, departing 13:42.
The 14:08 rapid express from Isehara.
Changing at Shinjuku, 15:08. Home before 16:00.
Expenses
¥208 — JR, Tamachi → Shinjuku. ¥607 — Odakyu, Shinjuku → Isehara. ¥370 — Kanachu bus, Isehara Station North Exit → Oyama Cable. ¥100 — shrine purification/offerings. ¥370 — Kanachu bus, Oyama Cable → Isehara Station North Exit. ¥607 — Odakyu, Isehara → Shinjuku. ¥208 — JR, Shinjuku → Tamachi. ――――――――――――――――――――――― ¥2,470 total. Fourteen stations worked, so ¥176 per QSO.
Touring the transmitting towers
For the inferred owners, counterparts and so on, see the 2024 edition: https://jj1wtl.seesaa.net/article/502711233.html (English translation) Just the summit area, reproduced from last year's version:
On Google Maps: https://www.google.com/maps/@35.4413794,139.2309812,44m/data=!3m1!1e3 Proceeding from the north.
FM Yokohama
Licence information: Hadano City, fixed stations rather than broadcasting stations; likewise below. https://www.tele.soumu.go.jp/musen/SearchServlet?pageID=4&IT=A&DFCD=0003616790ⅅ=1&styleNumber=21
TV Asahi
An FPU facility, as are the broadcasting-related installations below.
Quite a crack in the station building. Already repaired.
Licence information, Hadano City: https://www.tele.soumu.go.jp/musen/SearchServlet?pageID=4&IT=A&DFCD=0001467664ⅅ=1&styleNumber=21
NTV and Fuji Television
I noticed a nameplate on NTV's dish.
The attempt to read it failed. Anyone visiting: bring a tripod and try.
The other tower, south of TEPCO's station building.
Licence information follows. NTV, Atsugi City: https://www.tele.soumu.go.jp/musen/SearchServlet?pageID=4&IT=A&DFCD=0000015327ⅅ=1&styleNumber=21 Fuji Television, also Atsugi: https://www.tele.soumu.go.jp/musen/SearchServlet?pageID=4&IT=A&DFCD=0000015328ⅅ=1&styleNumber=21
TEPCO
Licence information, Atsugi City: https://www.tele.soumu.go.jp/musen/SearchServlet?pageID=4&IT=A&DFCD=0000012213ⅅ=1&styleNumber=21
JOSADA TELECOM
Piggybacking on TEPCO. Starlink appears to have been installed on top of the tall rack that seems to be the power supply.
East-facing, two antennas. The counterpart is AT TOKYO Central Center, CC1: https://www.google.com/maps/@35.6478068,139.7901347,52m/data=!3m1!1e3.
West-facing. The counterpart is NTT West Ashitaka Radio Relay Station: https://www.google.com/maps/@35.2529485,138.7861959,52m/data=!3m1!1e3!.
Two feeders emerge from the left/eastern chest and one from the right/western chest. Which implies?
- Left/east: equipment for the eastward link.
- Right/west: equipment for the westward link.
There seems to be a faint, unusually high-pitched sound mixed into the fan noise… It may be needless concern, but I recommend replacement or inspection. Licence information, Atsugi City: https://www.tele.soumu.go.jp/musen/SearchServlet?pageID=4&IT=A&DFCD=0004293304ⅅ=1&styleNumber=21
TBS
Camouflaged on the second floor. Look with your mind's eye.
On the way back. The building in the middle. It is getting busier.
Licence information, Isehara City: https://www.tele.soumu.go.jp/musen/SearchServlet?pageID=4&IT=A&DFCD=0000015290ⅅ=1&styleNumber=21
Shared infrastructure
Power. They have brought it all the way up here… Well, they do have their own station here. :-)
Communications.
