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Tr4 pto connections


 

Hello, I am restoring a tr4cw, with some problems, at some point they made a modification to install a dds, I have noticed that there is a loose white/red cable that comes from the pto, I can't see where it was connected. Could someone tell me the connection location with any image? thank you


 

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Hi

Coincidentally I replaced the PTO of my R-4C yesterday. The red-white wire from the PTO is for the +11 Volt supply of the PTO.?

73 Rob

Verstuurd vanaf mijn iPhone

Op 20 feb 2024 om 12:19 heeft Electronica valvulas <Clubyaesu@...> het volgende geschreven:

?Hello, I am restoring a tr4cw, with some problems, at some point they made a modification to install a dds, I have noticed that there is a loose white/red cable that comes from the pto, I can't see where it was connected. Could someone tell me the connection location with any image? thank you


 

Thanks for your response, where is that 11vdc point? I can't find it. thanks, again


 

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Hi

I would suggest to purchase the CDs from K0OAH. These are invaluable if you work on these machines. These, plus the circuit diagram will provide you the answer.?

k4oah@...


I could open my TR4C to make some pictures, but that wil be tomorrow earliest



73 Rob



Verstuurd vanaf mijn iPhone

Op 20 feb 2024 om 13:10 heeft Electronica valvulas <Clubyaesu@...> het volgende geschreven:

?Thanks for your response, where is that 11vdc point? I can't find it. thanks, again


 

The 11volts comes from a big wirewound dropping resistor from the 150V.? See the schematic and look for the resistor.

Hopefully they didn't remove it for the previous mods.
73,
Gary
WB6OGD

?


 

ok, i hope you images, many thanks