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1% capacitors are widely available and not that expensive. Ceramic ones are under a dollar on Mouser. 0.1% ones are a specialty item and are a few bucks each. 1% inductors are another story. I think

This version has 3 Sallen-Key stages rather than 2 in the earlier project. Plus there is some filtering in the input stage, but it was not optimized together with the rest of the stages. All this

As my best friend would say Daniel - you do you. We all enjoy this hobby in our own ways. I must admit that on reading someone's blog, if they mention how many hours it took them to build something,

You need to make sure all of the capacitor leads are 50 ohm oxygen free copper or you're wasting your time. -- Ryan Flowers - W7RLF https://MiscDotGeek.com ( https://miscdotgeek.com/ ) W7RLF

<sarcasm>If you want true audiophile quality, I am fairly certain you must gold plate all your leads and build a concrete base for your rig weighing no less than 50kg.? Next up, replace any

I don't think I ever posted here before. But I too like to build things. Some from scratch. Some from kits. And some from taking existing kits, such as Heathkit (HW-7, HW-8 on the list) completely

Don't worry about protocol or anything- this was just a way to engage people and give them an initial place to say something. Good to have you with us! [email protected]> wrote:

Hey Dave AA7EE, Many of us here were already familiar with you because of your blog. And I do not find it "strange" at all.? Your builds are a work of art as others have said on here - or

Aaah, the audiophile connection. It's funny you should mention that Doug, because I've noticed that the CW stations I've received on receivers which have VFO's that are temperature-compensated with

Very cool, Mike. Thanks for sharing. Is the filtering different from the DC receiver AF chain that you posted on OSHWLab? I'm going to put this on my "to build" list. Thanks and 73 Mike M.

Shoot. I just realized that I was supposed to reply to this thread before posting. My apologies if I came across as rude in not following group protocol. Hi, I'm Dave, and I like to build things. I

I imagine you can craft traceable inductors and capacitors with precision dimensions. But remember they have parasitic reactance so they must be chosen with the instruments test frequency in mind. at

I have not purchased from this company but this looks interesting https://www.elliottelectronicsupply.com/polystyrene-capacitors.html looks like they may come

I think most of us are familiar with Kits and Parts Allison. In fact, their owner/proprietor Mike KU4QO is an active member of this forum, and probably reading this thread. A trusted supplier of

I have, in the lab, freq standard voltage standard resistor standard all within 0.1% or better.? NIST traceable. All I'm lacking is capacitor and inductor standards. I found the following on ebay

I recommend looking at Lapidary cutting blades as they are the thinnest.? They are used for cutting banded agate, ruby, sapphire and other precious stones and they don't want to waste precious

Jim, Thanks for the info! I got those caps in my cart. Alan, N8WQ

I don’t know why I’ve not thought of it before. A Diamond blade from a wet saw, installed in a wood saw, goes through FR4 like a knife through butter.

This time I am sharing my latest project on Github: https://github.com/3ym3ym/af_chain4dc_rx If you, like me, don't like the low gain and hiss of LM386 as the AF amplifier of your receiver project,

My solution is based on testing of toroids is that they do have external fields. In a 10M radio I needed small bandpass filter but the toroids did interact if too close.? MY solution (since they