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Re: ATU-10 operates incorrectly #ATU-10

 

Did not follow the discussion but to test the swr bridge you can switch antenna for transmitter. You don't need to have the tuner enabled and do not connect power.

To check if the swr bridge is symetrical you connect a dummy load to antenna connector and some small power to transmit input. Swr should be 1:1.0. than you switch the ports. Antenna becomes transmitter, transmitter becomes antenna. The swr should be 1:1.0 too.?

Measure the voltage after the diode rectifier with high impedance Volt meter. Based on the voltage you can calculate the swr ratio.?

Best regards,
Onno pa1ap


Op do 17 mrt. 2022 13:55 schreef Wolf <dk1et@...>:
Uups ... forgotten:
4) With reference to Glenns tip I measured voltages forward / reflected:
a) Power 5 W -> ~ 1.3 / 1.0 -> SWR 7.7 corresponding to displayed SWR
b) Power 2 W -> ~ 0.9 / 0.7 -> SWR 8.0 dito

<You should then be able to reverse the RF power in connection ...>
Not understood und thus not done ...

73 de wolf, dk1et

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