PortsDown 4 Some questions...

Discussion about this major DATV Project. See https://wiki.batc.org.uk/The_Portsdown_Transmitter
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Roberto48
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Joined: Fri Jul 06, 2018 2:04 pm

PortsDown 4 Some questions...

Post by Roberto48 » Mon Mar 02, 2026 2:21 pm

I have build the PortsDown 4 with a Pluto.

It's working great but.... Some questions:

- When I measure the Pluto's output on the various bands, I notice that the 2m band output is more than 3 dB lower than on the other bands. I measured this with both an SA and a PWR meter.

- After I turn off the Tx via the touchscreen, the Pluto continues transmitting for at least 3 seconds.

- When I switch bands/menus, the PortsDown logo briefly appears before switching to the other band/menu.

- I thought the latest firmware also allowed the Pluto to reach 50 MHz. But when I select that in both PortsDown and Langstone, the lowest frequency is 70 MHz. Is 50 MHz not possible, or do I need to configure it somewhere?

I'm curious if anyone else has had the same experience or what a possible solution might be.
Thanks in advance for your answers!

73's
Rob PA0RWE

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