He passed away in May 2021. We pray for the repose of his soul.
| GO TO JA5CJM-Library |
| Kouchi GooglePosition |
| Rig |
I'm not sure which ones are radios, but I have a lot of empty boxes I bought online.  |
| ANT |
3.5M = Wire dipole, 14M = 3 element Yagi. The shack is about 150m away from here and is pulling it with two coaxial cables.  |
| Antenna Tuner |
When we made the power meter/SWR meter/auto-tune control device (Z-500), everyone added a direct-down motor-controlled Robocon to the CD-78 antenna to auto-tune it, but the station chief, who uses a full-size antenna, made his own antenna tuner so that it can be best tuned and ON-AIR on any frequency. It uses a geared motor and is an old style, but the idea of a threaded dial is quite pure. I can't think of anything else, I can only think of a structure with a shaft coupling. It is best tuned and used every day by FB, rain or shine.  |
| High Power Amplifier |
This is a semiconductor high-output linear amplifier using 8 ARF466X. Maximum output: 1.5KW IMD: -35 to 36dB. The high-order distortion characteristic of semiconductors is said to be as good as that of a vacuum tube. It is unfortunate that the circuit diagram is not publicly available.  |
| Homemade tramber |
Left: Finished: Using the universal VFO, it has been nicely put together as a 3.5M/7M transceiver. Right: Receiving block: Made using the remaining board from a Neptune direct receiver Middle: Transmitting block: Can be switched between PSN and Weber modes  |
| PA15 PA50 |
Left: RD16HHF!X2 15W power amplifier Right: SD2931X2 50W power amplifier  |
| Homemade microphone |
This is a homemade microphone using a 100 yen condenser element.  |
| Puluto |
We all built the Pluto transmitter (PSN all-band transmitter), and the station director also built his own receiver and put it all together to create a transceiver function.   |
| LCR Meter |
It was made after being sold cheaply on Amazon and was a hot topic among local radio stations. It can measure LCR values, of course, but also hfe of transistors, FETs/diodes, etc. In particular, it can accurately tell you the E/C/B and S/D/G terminals of transistors/FETs even if you don't know the electrodes or if the terminals are connected in the wrong order.  |
| イノシシ |
●It seems that you are a member of the wild boar capture team, but do you capture and cull cute boars like this one on the left? ●2015 = 6, 2016 = 0, 2017 = 1. Right side = over 60kg.  |
