Not a good idea, Bob.

Some batteries, particularly lead-acid, see the pulsing DC as charge-discharge cycles, shortening their lives. Diodes do not have infinite reverse resistance; so, leaving a battery connected to a transformer + rectifier combo will discharge the battery a bit faster than shelf life.

If you don’t use a battery or regulator to smooth out the pulses, your outgoing radio signal will be modulated with 100 Hz or 120 Hz noise.

73 de Brian, VK2GCE

From: Bob kb8tq [mailto:[email protected]]
Sent: Tuesday, 6 September 2022 1:54 PM
To: Brian Clarke
Cc: Glenn Little WB4UIV; ARC-5
Subject: Re: [ARC5] 24vdc power

Hi

If this is a basic “no regulation” supply ( = transformer driving diodes into a load + 

(maybe) a cap …) the addition of a diode to isolate this or that does nothing useful. 

Bob