Re: HPF Instructions Errata

Jerry Brown



My kit arrived this week and I will be building before our local ham club meeting in June.

I have working  4SQRP LPF built at Ozarkcon a while back.

Will be giving talk and short demo with these filters.

When I was at MIZZOU for masters in '69 and '70 took graduate course "DIGITAL AND SAMPLE DATA SYSTEMS"

and one of my projects was using main frame to emulate/implement  Chebyshev analog filter principles as digital filters.

That's about the time I decided to bail out of EE  for med school :-)


Jerry N4EO

On Sat, Jun 1, 2019 at 7:37 AM nm0s_qrp via Groups.Io <> wrote:
A sharp-eyed builder spotted some mistakes in the 4SQRP HPF kit instructions with incorrect part numbers.  In a nutshell, the proper parts values are:  C1 and C5 470pF Mica, C3 is 330 pF Mica, C2 is 0.01u ceramic, and C4 is 0.0047u ceramic.  The updated assembly manual and schematic, revision A, will be uploaded to the web page soon.

If you have assembled your kit, please modify it per this information.  If you need replacement components, let me know.

73 Dave Cripe NM0S

Join to automatically receive all group messages.