[Elecraft] [KX3] Boost Buck 13.8 V Regulator

[Mark Newbold]

Regarding that first regulator, the QSKJ QS-1212CCBA-80W, I have one of those. The IN- and VO- 
connections are apparently not wired together internally. You can't look inside because the whole 
thing is potted in some solid substance. In the interest of having all my equipment on a common 
ground, I wired the IN- and VO- together. Now the red "error" light is lit all the time (even when 
those connections are not wired together). And the device shuts down regularly (output voltage drops 
to zero until power-cycled). I don't know whether the failure was caused by wiring the connections 
together, or whether it's just coincidence.

The thing doesn't make much hash at KX3 receive current levels, but hash increases if you draw more 
current from it.

--Mark K7NEW


On 5/15/2013 11:41 AM, Jon Moody wrote:
> Hi Glenn,
>
> I have purchased both of these DC-DC power converters and have been very
> happy with them.  They both have an adjustable output set voltage and seem
> to have very good regulation.  The only issue is with RFI that they
> generate.  The good news is that they are pretty well shielded in aluminum
> cases.   But their is stil some leakage from the power connections but I
> have found that attaching good quality ferrite beads on the power
> connectors to pretty much eliminate this as well.
>
> http://www.ebay.com/itm/Low-Ripple-CC-CV-Car-Power-Supply-Module-LED-Driver-DC-DC-8-30V-to-2-16V-80W-/251112762798?pt=LH_DefaultDomain_0&hash=item3a777cadae
>
> http://www.ebay.com/itm/DC-DC-150W-Non-Isolated-Booster-Voltage-Converter-6V-32V-Step-Down-to-0-8V-28V-/260968513486?pt=LH_DefaultDomain_0&hash=item3cc2ef7fce
>
> YMMV and I am sure that their are many other equally fine Regulators out
> there....

-- 
Mark Newbold K7NEW
Sequim, Washington, USA
http://dogfeathers.com