Re: Variable power control
Yes, a switcher is much more efficient than a linear regulator,toggle quoted messageShow quoted text
but amps of current getting switched at one mhz or so can create hash you hear in the receiver if
not properly filtered and shielded. I can receive well using a desktop 12v brick meant for use with a monitor,
it is also a switching power supply, so it may be possible to use that ebay buck converter.
Another possibility is to normally power from 12dc, and enable a boost converter to generate 24v
only when transitting. Many switcher chips have an enable pin, though I don't see an enable
talked about on most of the board level products available on the web.
Much of the rig power during receive is going to the Nano and display and si5351.
Could cut that significantly with a 12 to 3.3v buck switcher (using 3.3v display and processor)
if you could get it clean enough.
On Tue, Jan 2, 2018 at 01:47 pm, Jack Purdum wrote: