[Milsurplus] [MRCA] Component storage

[mstangelo at comcast.net]

Mike,

Ed Wetherhold, W3NQN, published articles in QST and RF Design on filter design using standard value capacitors. They have a good collection of his designs in the reference section of the ARRL 2000 Handbook.

I used his 5 pole high pass filter design. Since in can insert the filters in the receive section of my uBITX I used the polystyrene caps and T-37-6 Iron Core toroids.

My Xeigu G90 has a same issue but I don't want to go into the circuitry so I used an external filter with 500 volt Mica capacitors and T-50-6 toroids.

Like some others on this list I like to modify equipment, test it on the air and go to the next project.

Mike N2MS


> On 11/22/2022 11:59 AM Mike Feher <n4fs at eozinc.com> wrote:
> 
> 
> Hi Mike –
> 
> I had the same issue with my Astro Cubic 102BXA about 40 years ago. When I build filters I like to use the Cauer/Elliptic design. I built a HP filter for the radio and put in in the receiver chain. I designed it such that there would be a zero at the most offending AM station. Worked great. 73 – Mike
> 
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell NJ 07731
> 848-245-9115
>