Braden,
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Tisha is saying that linear regulators burn the difference between Vin and Vout as heat.
Your DROK is a switcher, not a linear regulators, that's a good solution if it doesn't create too much noise.
About half of the posts in this thread are about linear regulators.
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Tisha's advice on linear regulators is good.
1)? Linear regulators should have caps on input and output to keep them stable, or they may oscillate and cause noise.
2)? Also check the datasheet for the dropout voltage, some require that Vin be a couple volts greater than Vout.
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Some linear regulators have a dropout of less than half a volt.
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Don ND6T descripted an effectively zero dropout circuit he had seen in SPRAT:
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Jerry, KE7ER
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On Fri, Apr 11, 2025 at 04:02 PM, Braden Glett wrote:
Tisha,
I wanted to make sure I'm understanding what you are saying.
As stated earlier, I am using a Drok to regulate from a 12v LiFePo Bienno 3 Ah (actually 13v as I measure it), down to 11.9v. I hear you saying I might be losing more in heat from the Drok than the rig is putting out in power when transmitting (a lot more, in fact!). Yet, I don't feel any detectable heat coming from the Drok.
Is there something I've misunderstood?
TY 73
Braden Glett KD8ZM?
