Leif M 2023/03/16 11:55
When output from a VNA is squarewave, a lowpass filter is needed to measure some amplifiers. Does anyone know where to get them. Like ones from Mini Circuits with SMA connector. But I think they are discontinued.
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Source of good low cost low power lowpass filters?
Bob Groh wa2cky 2023/03/17 05:55
QRP_Labs has a family of LPF's - about $5 USD each. PC Board plus parts. No connectors, etc. Suggest you look. at them.
https://www.qrp-labs.com/lpfkit
73
Bob Groh, WA2CKY
Jim Lux 2023/03/17 08:07
On 3/16/23 11:55 AM, Leif M wrote:
> When output from a VNA is squarewave, a lowpass filter is needed to
> measure some amplifiers. Does anyone know where to get them. Like ones
> from Mini Circuits with SMA connector. But I think they are discontinued.
MiniCircu has has plenty of LPF with SMA, both SLP and VLF series, for
instance.
Jim Allyn - N7JA 2023/03/17 11:40
MiniCircuits filters are not discontinued. More likely, their filter line is expanded. SMA, BNC, N connectors, surface mount, whatever. Go here:
https://www.minicircuits.com/WebStore/RF-Filters.html
Click the blue button for Low Pass, then check the boxes for Conn., 50, and Lumped LC. For SMA connectors you want the SLP series. I have no connection with MiniCircuits other than they have a wide variety of RF products of good quality and they're one of the first places I check when I need something. But I often buy through distributors like Mouser. No connection with them, either.
Leif M 2023/03/19 12:41
Nice. I'll checkl Qrp Labs and Mini Circuits
Thank you
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