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John AE5X writes: For some of us, 5 year old excess parts are darn near brand new. Should be expanded as follows: Class A - the five year rule Class B - hasn't been used since Y2K Class C - hasn't

I have some stuff to contribute as well for the price of shipping. Better to see it used by someone than sit around here gathering dust. Excellent idea and I also agree with the "if it hasn't been

John, I'm sure there are some that will take you up on your offer. I brought up the stamp + envelope as a way for me to get back to getting rid of 'stuff' and downsizing the lab. Isn't there some

Chuck, I saw Diz' email earlier and now I've got 100 MPSH10's ordered and headed to me in North San Diego. This will be way more than I will ever use and I'm more than happy to share if anyone is

OK, I way over charged you for the envelope. Found on ebay and US shipper: https://tinyurl.com/y4tnejze $11.97 per 100pcs with free shipping. We can keep Diz in business now by paying him a buck for

I think I have news, but then I may not. I ordered two microSD cards for a Raspberry Pi 4 project last week and I got the envelope today. It is a 18.0cm by 12.25cm padded envelope with thin bubble

Thanks for all the replies. I already had the calculator downloaded and forgot about it The core is wound. 72, Jimmy, W9JDH

MicroMetals produces a document called Q Curves of powdered iron cores. I see it can be downloaded at; http://www.pleo.com/micrometals/catalog.html

Ed is correct about the operating frequency ranges. This website is also a wealth of info: https://toroids.info/ Peter KF7PSM

https://www.analog.com/en/technical-articles/ltspice-generating-triangular-sawtooth-waveforms.html Hi... Could be of interest. Also getting to some grips of LTspice.. Not enough lifetimes 73 Ken G3UDA

Not to mention the multi-part video series he does for lots of his projects. I bet at least half of what I know or can build is a direct result of Chuck's videos!

Regarding the error ... if you're trying to write the pulse statement directly, you may need to associate it with a source and nodes. I looked at my Netlist and see this statement: V1 N001 0 PULSE(0 5

Hi Chuck - You're trying to generate a square wave? I add the voltage source, right click on it, choose "advanced", check "Pulse" and fill out the table like this: (I'm figuring a 1 MHz square wave, 0

Me too, on everything. I'm building a 5W and am using Chuck's manual as I build. I doubt that many of us really appreciate the work he puts in while creating one of these manuals. Think about it:

I'm attempting(?) to model a circuit that uses square wave input. I've looked at LTSpice tutorials and searched the web and haven't found anything that works for the .pulse directive. I get this box

I, a kit builder, second all the accolades! Thank you so much!!! I loved the “I burn up more rolls of solder than log books” comment. David J. Wilcox K8WPE’s iPad

Diz, I am going to ramble here so I proffer my apologies in advance. Do not get yourself down about these trivial oversights. Ya done good with the 1Watters and 5Watters. For about $55 you got us

The -6 and -2 identify different mixes for the ceramic formula. They not only have different Q,s and different inductance per turns, they also have different optimum operating frequencies. Spend some

It's not really necessary. Anything that can be done with a toroid inductor can be done with an air-wound coil. Toroids are preferred because most of their fields are maintained inside the ring-shaped

Is there a website that explains designing with toroids? Is there a tool for calculating inductance? Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark"