Mostly DIY RF Forum - Recent Topics

P3ST inductors and missing notations on schematics

sbx — Mon, 05 Jan 2026 21:00:41 +0000

Hello,

I'm very close to finishing the receiver portion, but am a bit confused about the inductors listed for the RF amp and IF module.

The schematics on github show three of these inductors as 9.5uH, and does not label the two matching inductors on the IF module. The IF module schematic is also missing notation for many capacitors. (I made some assumptions here based on the capacitors parts list and other posts)

I thought the three 9.5uH inductors were expected to be hand wound, but then I realized I have a pack of (5) 22uH inductors from the parts list (which is way too many if the first three are hand wound)

I was hoping you would be able to clarify the schematics for the RF amp and IF module?

Thank you!

P3ST motherboard rev 5.8.2024

sbx — Sat, 27 Dec 2025 01:57:50 +0000

Hello, do you have the schematics/kicad/info on the motherboard rev 5.8.2024?

Ty!!

Parts missing from parts list?

sbx — Sat, 29 Nov 2025 01:50:31 +0000

Hello,

I've just started working with this project and believe there are two parts missing from the parts list. (there may be others but this is what I noticed so far)
On the Digital VFO/BFO module, I don't believe D3 or R5 exist on the parts list. Did I miss them?

File: Pssst_Xiao_Digital_VFO_BFO.kicad_sch

Crystal filter Testing

zl1mrf — Thu, 24 Jul 2025 21:44:09 +0000

I have put a video up on Youtube regarding testing of an earlier SSB QER filter produced by MostlyDIY RF. It is at this link

Video #002 SSB Crystal filter video

Kevin

Share and share alike

tcarney57 — Tue, 06 Aug 2024 22:15:28 +0000

Folks,

Thanks for coming to the P3ST forum. This is the best place for everyone to share their questions, their informed answers, and even their trials and tribulations related to the P3ST kit. Please consider this forum as your go-to source for help as you build the kit and coax it into getting on the air. As I've mentioned elsewhere, the P3ST's designer, Pete N6QW, may participate here as he wishes and is able to. Please do not contact him directly about the MDRF offering. Aside from contributing his circuit designs he has no connection with the project.

73,

Todd K7TFC