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Curt, I couldn't agree more!? QCX has astounding performance / $? It is also great to see more amateurs designing, experimenting, and building. Randy AD7ZU

I found a Superior TD-55 Vacuum Tube Tester. It has a soft carrying case, manual, and cross reference list of tubes included. It appears to light up when plugged in, but I have no idea if it is

I received my NorCal Sierra parts from Germany today. Now I have the start for a NorCal Sierra and 3 NorCal 40 rigs. I recently went through the manuals for the NorCal 40, NorCal Sierra, Elecraft K1,

Well certainly that's a path for an all band rig, but for a bit more than $49. Sometimes we need to marvel at the mix of technical with value. I imagine a lot more QCX rigs on the planet than KX2

Allison, as always,? enlightening commentary actually what I have been considering is to mod a ubitx to convert the 2nd IF to12Khzthen the remainder in DSP (final baseband frequency translation,

Randy, IT also makes for a slew of birdies and lots of circuitry and maybe a needs for shielding. Since according to some you can make IQ phasing work perfect at only one frequency why not stop at the

Here is a good bunch of pdf's of Motorola databooks with lots of rf components. http://ae6pm.com/Semidata_books/

Just a few more thoughts The dual mixer architecture of the current in vogue imagecancelling receiver architecture does have some downside.? The amplitude and phase errors accumulatefrom imbalance in

Jim and all the main thing is that the tools used for scoring the aluminum needs to be sharp and hard. I have used old files and they seem to outlast any blades I have used in a utility knife. 72,

There are some good books about radio technical stuff from the BBC engineering info page. They have some good stuff on smith charts, propagation, antennas, sound, etc. There are also some older books

I wonder if the handheld scoring tools sold at home centers for use on plastic sheet would work on aluminum? I think I have one somewhere; if I find it I'll give it a try. Jim WB4ILP

Hey Jimmy ! That should work. I'll give that a try. Many years ago I received free samples of thin flat brass sheet that were shaped and scored so the flat sheets could be bent to form a 5 sided box

Jim, if you have a brake you can measure the size of the pieces you need, then mark your pieces with a fine tipped Sharpie. You can then use a good straight edge and score the pieces with a good

My favorites http://archive.org and https://www.americanradiohistory.com Fred W4JLE

I have found and downloaded some full pdf's of databooks from Motorola etc that I find occasionally on the web. This allows me to donate or recycle the space consuming book on the shelf. I honestly

Is there a practical way to score thin aluminum sheet so it can simply be bent and broken away? Jim WB4ILP

There is an old sheet metal trick for table saws (or hand saws) when it comes to thin gauge Al. Mount the blade backwards. Rolf K9DZT

Or you could always make one - https://www.youtube.com/watch?v=LzpV6T9Yltc

I did. Nothing there. 72 - n0hj

Check your PM inbox. -- William, K6WHP "Cheer up, things could get worse..so I cheered up and, sure enough, things got worse!"