开云体育

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

My earliest project using manhattan variant was 1973, summer. I was building a few bits for testing UHF RF source, UHF Preamp, and some repeater bits (for commercial 464mhz).? By then I had years of

Daniel You are getting a decent feel for components in vogue. G QRP might still have a utility to design low pass filters. Info is still around. Many filters can be constructed with T50-2 toroids.

Has anyone here ever heard of: https://www.kitsandparts.com/caps_poly.php ( https://www.kitsandparts.com/caps_poly.php ) They are a good source of ferrites and other toroids and many other common

Hi I uploaded some OHR Qrp Manuals in Files Section. Still I do not have any:) Regards and 73s de TA0G Hakan GUNER

Thanks.? I have the manuals, but it would be nice to get them from some one else to make sure they match. It is appreciated.? Thanks for the help. -- chuck adams, aa7fo QRP WAS 17m started Apr 2,

The question is, what kind of *poly* ? Polystyrene (what we all want) or one of the much more common types, Polyester or Polypropylene? I would be shocked to see polystyrene capacitors on Amazon,

I've not built it, but if you have a nano vna you can build the same filter he built, and just remove 2-3 windings at a time to get into the 3.9-4.0 range instead of 3.5-.3.6. I doubt a complete

I have an OHR 500, the DDS that goes with it, and a WM-1 that I have picked up along the way.? I will go through my manuals and scan/upload any that aren't on archive. org.? Thanks Chuck! 73 Bill

Hello, Has anyone built the Simple SSB Transceiver that was shown on the blog and videos by Charlie Morris, ZL2CTM? Any suggestions? https://zl2ctm.blogspot.com/2021/01/simple-ssb-transceiver.htmlExp

I asked Grok and it pointed me to Parts Connection among others. Appearently out of Canada. They seem to have lots of polys for sale: Parts Connexion partsconnexion.com Probably be some tariffs