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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

Well, if my dad were still here ( W4MAI - sk 2006 ), he could tell you about how a single 8-bit accumulator would fill an entire equipment closet :0) Many years ago, he worked for IBM? somewhere in

Does mastering (= PHD) the 8088 count in the contesr? : o )) ham 1957 retired 1997 72 73 John N3AAZ

Yes, "we" are. Simply put, it was fun discovering the parameters of, and avoiding running afoul of Hans' encoder debouncing state machine as I experimented with the "My_encoder_de_N4QA" PC app. 72 /

And remember a few weeks ago a new build went thru this... with fried finals, the rx was deaf until finals were changed... receive signal was rf-grounded thru the damaged finals so "nothing" was left

Simon, Michael, They will be IQ signals but the QCX is not intended to be wideband. I'd think C4,7,43-46 would really need reducing. 73 Alan G4ZFQ

Hi Michael, I've tried it from IC5 pins 1 and 7 and it did seem to be baseband audio at that point. I got at least 0 to 24kHz bandwidth feeding my homebrew panadaptor. It was a little experiment into

And with VNC (built into Raspbian) you can operate remote from anywhere! I'm honestly surprised I'm not playing radio from work every day ?