[time-nuts] Switching regulator replacement for 7805

[John Ackermann N8UR]

I found a cute little switching regulator that's a drop-in replacement 
for an LM7805: http://www.ebay.com/itm/261243604047

I got a couple to play with, mainly to see how bad the noise would be. 
Here are spectrum analyzer and PN shots comparing a cheap surplus OCXO 
when driven by a regular 7805 and by the switching replacement.

The switching frequency is supposed to be 2 MHz but you can see that 
it's more like 2.4 MHz.  Whether this performance is sufficient for any 
application is up to you.  It sure runs a lot cooler than a 7805, though!

John



-------------- next part --------------
A non-text attachment was scrubbed...
Name: PulsePuppy-regulator_comparison.png
Type: image/png
Size: 113990 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20161204/309fc360/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Regulator_Comparison.gif
Type: image/gif
Size: 32708 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20161204/309fc360/attachment.gif>