[ARC5] osc. reg.

[Kenneth G. Gordon]

On 1 Jan 2013 at 17:13, Dennis Monticelli wrote:

> I recommend using a shunt regulator (as has been suggested) for the
> osc.  I use VR tubes but solid state works well too.  One thing I
> would suggest you add is another shunt element on top of the stack to
> power the screens of the PA.  This will typically eliminate any
> remaining chirp.  The screens consume more than 10mA so the current
> feed to the shunt elements (tube or solid state) would need to be
> boosted.
> 
> Dennis AE6C

Excellent suggestion, Dennis. I agree.

BTW, the reason I use VR tubes is because I like the pretty colors.

In point of fact, Zeners work at least as well as VR tubes, but are cooler, and 
less prone to oscillation.

However, either VR tubes or Zeners, when used properly, easily achieve 1% 
regulation, which is excellent.

Ken W7EKB