[TenTec] On Switching Power Supplies

[denton sprague]

I have a homebrew 35 amp 13.8 vdc power supply out in the garage…made it many years ago with a home-brew lm317(?) 3 legged adjustable voltage regulator. I have never like my regulator system…otherwise the power supply is very stout.
Anyone make a good regulator board for same? 
On Jan 18, 2014, at 7:28 AM, "Bob McGraw - K4TAX" <RMcGraw at Blomand.net> wrote:

> I've found a very few linear power supplies generate noise.  However those that do I've found are largely due to deteriorating decoupling capacitors in the regulator circuit or due to a highly reactive load on the output. Typically the oscillation can be from a few Hz to over 100 KHz and equal in amplitude to the output voltage.  Real nasty stuff.
> 
> A well designed and manufactured power supply, be it linear or switcher, will not generate any objectionable noise.   Any noise generated has been found to be several dB below the typical noise found on the HF bands and even VHF bands.
> 
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> 
> 73
> Bob, K4TAX
> 
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> 
> ----- Original Message ----- From: "Jim Brown" <k9yc at audiosystemsgroup.com>
> To: <tentec at contesting.com>
> Sent: Saturday, January 18, 2014 12:21 AM
> Subject: Re: [TenTec] On Switching Power Supplies
> 
> 
>> On 1/17/2014 3:44 PM, george fritkin wrote:
>>> linear power supplies can cause noise a very proven fact
>> 
>> Perhaps you could tell us the mechanism.  I can think of only two -- oscillation in a regulator circuit, and improper termination of ground wiring.  The latter has nothing to do with power supplies, and the former is another engineering goof. .
>> 
>> 73, Jim K9YC
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