[Elecraft] OT: Astron linear PS regulation issues

[K9MA]

That's interesting. About the only way I know that a linear supply can 
be noisy is if the regulator oscillates. That can easily happen. Most of 
them use emitter followers, which are often unstable driving a 
capacitive load. That's usually easy to fix by inserting a small 
inductance between the emitter of the transistor and the load. A few 
turns of the appropriate sized wire around a ferrite bead usually works.

73,
Scott K9MA

On 2/25/2019 18:57, William Rascher wrote:
> On Monday, February 25, 2019 4:26:40 PM CST Rose wrote:
>> I've found instances of regulation failures caused
>> by loose hardware.
> With the RS-35m Astron Linear PS I have issues with noise.  I purchased the
> PS because everyone around me swears that they are great.  Well, from my
> experience the Powerwerx SS-30DV is far cleaner, quieter, and fewer $$.  I
> though the problem was something along the line of LED lighting, in my
> shack was generating the  noise.   When I used a battery for the PX3 & KX3
> in my shack during a power outage the PX3 screen was so clear I was
> stunned.    I have 3 different Astron linear PS and all are noisy.


-- 
Scott  K9MA

k9ma at sdellington.us