I thought I had posted the mod done on VK3BPH's FM-75B Arduino VFO but I cannot find it.
I'll have to dig the info up and do a post on it.
Today I started the mods for another FT-75B, this one from VK3GSR. The first one I did included mods to the radio, removing the 5 pin and 7 pin sockets used for the external VFO then adding a 5 pin DIN socket for the new VFO and installing a resistor ladder on the band switch for the Aduino to read. But this time, I want to eave the radio as standard so plugs are needed. There are hard to find so I made them.
The 7 pin "Valve" socket plug was put together from some pins out of mini XLR plugs, and I found a 7 pin valve pin straightener in my junk so that became the plug base. This picture shows a 9 pin straightener too. (They actually are 8 and 10 pins just to make fitting on the valve pins easier.)
The holes were drilled out to 1.5mm to suit the step on the pins.
For the 5 pin plug, some 2.4mm bronzing rods were pressed into service.
5 lengths were cut and the ends rounded a bit. Then wires soldered on and reinforces with dual wall heat shrink.
Heat proof tape was put over the 5 pin socket, the pins pushed through into place , a length of PVC pipe places over tit then hot melt glue pumped in. This is pretty rough but works ok. For the 7 pin plug, the resistor ladder was soldered into the pins, wires, and hat shrink tube added to make the band plug.
And they seem to fit!
I'll post more info later.
I'll have to dig the info up and do a post on it.
Today I started the mods for another FT-75B, this one from VK3GSR. The first one I did included mods to the radio, removing the 5 pin and 7 pin sockets used for the external VFO then adding a 5 pin DIN socket for the new VFO and installing a resistor ladder on the band switch for the Aduino to read. But this time, I want to eave the radio as standard so plugs are needed. There are hard to find so I made them.
The 7 pin "Valve" socket plug was put together from some pins out of mini XLR plugs, and I found a 7 pin valve pin straightener in my junk so that became the plug base. This picture shows a 9 pin straightener too. (They actually are 8 and 10 pins just to make fitting on the valve pins easier.)
The holes were drilled out to 1.5mm to suit the step on the pins.
For the 5 pin plug, some 2.4mm bronzing rods were pressed into service.
5 lengths were cut and the ends rounded a bit. Then wires soldered on and reinforces with dual wall heat shrink.
Heat proof tape was put over the 5 pin socket, the pins pushed through into place , a length of PVC pipe places over tit then hot melt glue pumped in. This is pretty rough but works ok. For the 7 pin plug, the resistor ladder was soldered into the pins, wires, and hat shrink tube added to make the band plug.
And they seem to fit!
I'll post more info later.