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If you have access to a 3D printer, you can try to make this small and lightweight key and see if you like it. The design can be downloaded from Thingiverse

I have started to do some more precise frequency measurements using the Progrock and the QLG1 with "inverted logic" PPS output, with a 1kilohm resistor in the PPS line between the two boards (at the

Hi Dan It wasn't YouTubed last year, but the audio was recorded for a podcast. http://qrp-labs.com/dayton2018.html has the slides and the link to the audio. Same procedure this year. 73 Hans G0UPL

But you managed to avoid TECO. John F5VLF

Does anybody know if Hans' presentation will be captured in any way? I'd love to go to FDIM just can't swing it. I will go to Dayton this year. I know one of Hans' presentations last year was

Hand = Hans in my last post. Sorry Hans. [email protected]> wrote:

Thank you Hand for preserving a very cool bit of history so comprehensively on your website. Chaz Fletcher G3DXZ also had a minimalist 1 chip stabilizer I thought was very clever and looks pretty easy

Hi Steve Yeah, happy days. By the way, the URL is http://hanssummers.com/z80.html - but because the site has an old version of Joomla content management system, there seems to be some issue, sometimes

Hi guys, I’m waiting for Hans to complete the design of the QRP Labs computer. But wait. He’s already done it http://150.ip-149-56-110.net/z80.html Have fun! Steve G0XAR

Hi all Huff & Puff was a passion of mine. I was licensed in 1994, but for various personal reasons did not go on air. I did keep reading RadCom (monthly journal of the RSGB) and was fascinated by the

Started on IBM 650 with direct machine instructions. Then FORTRAN (no #), FORTRAN II on IBM 70954, 7044, PDPs 1,5,6,7,8,9,10, CDC6600, C on various microprocessors and Postscript (yes it''s a

Hello, Robert. Okaaaaay...it's rudimentary as it now stands... Currently, in the attached screen shot: Using the app on the left with the QCX-series rigs. Using the app on the right, (? ca 2000 ),

If I had the time and a HG-10 to play with I would love to take the HG-10 circuit and put it into a modeling program. Then do an analysis to figure out which componets contribute the most to frequency

When I first got interested in programming microcomputers, I was teaching at Econ at Butler. There was no CS department there, so a colleague and I taught a one-day seminar for the business community

How could I forget David Larsen et al of the Blacksburg Group when mentioning the Bugbook series?! Sorry Dave. I remember when you guys would come over for a visit and a chat. 72 / 73, Bill, N4QA

Hi Bill, Like Ben perhaps, I am left with more questions than answers/understanding.? I am sure many would love to understand more about what you have been doing if you are so inclined to describe it

Thanks, Mike. In fact, "Leave the low pass filter in place and just put the bandpass/band stop after the output." is exactly what I've been doing. It's better than butchering the rig, I suppose, but

Ah yes, same Fortran IV era. 1971 MBA thesis "Counterculture and the Business World", predicting a softer, gentler capitalism (ha!). Hauled stacks of punchcards with survey data up to the Computer

Consider either a bandpass or band stop filter. ?You can use Elsie LC program (downloadable free) to test out the filter. ?My bandpass filters matched the test circuit very well. Leave the low pass

First step will be to get a PTO up and running. ?I also am looking at a Vackar. ?Very fascinating. ?One reason to try the PTO is to see if it is quieter than an ARDUINO VFO. ?It also draws