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Date
Re: For documentation: The phasing
Oh hey, it never really went away. KK7B had articles in the late 90's about a phasing receiver, and a companion SSB exciter board was also produced. Most of the radio functions in your spartphone are
By John Seboldt K0JD · #88750 ·
Re: RPi C Development
Funny that UNIX derivatives (Linux, etc.) are still around if they aren't so good. Incidentally, I recall repairing ADM-3A terminals 40 years ago. That "pizza board" could be a royal pain in the
By Gerald Sherman · #88749 ·
Re: RPi C Development
This is the most straight forward tutorial I have seen for headless config.? Skip step 6, you don't need bonjour if you can find the pi in your router's client table.
By Doug W · #88748 ·
Re: Smooth non-erratic tuning without mad blinking.
Hi Sergeo, Do you have an alternate place to view the video?? I don't use Facebook (on purpose) so it won't let me see your video. Thanks! :-)
By Will B <will.brokenbourgh2877@...> · #88747 ·
Re: RPi C Development
Regarding VMS vs Unix on the VAX: When I started C programming in the early 80's, it was on a VAX-11/780? running 4.1BSD Unix. When you logged in on your ADM-3A terminal each morning over an RS232
By Jerry Gaffke · #88746 ·
Re: RPi C Development
Yep, we have a MicroCenter in Sharonville, on the NW side of the city. I need to get one! Jack, W8TEE
By Jack, W8TEE <jjpurdum@...> · #88745 ·
Re: RPi C Development
If you just want to get a feel for it, it is fairly easy to configure any of the models with wifi for headless remote access using either putty for command line or vnc for gui.? Assuming you have a
By Doug W · #88744 ·
Re: RPi C Development
I been through this battle before. Purdue is a little unusual in that it had two "CS" departments. The one is where the real propeller heads are housed and they were doing some real bleeding-edge
By Jack, W8TEE <jjpurdum@...> · #88743 ·
Re: RPi C Development
Farhan: I don't have a pico yet. Given what you just said, do you think the advent of the pico, then, is just an attempt to move some Makers to an RPi board in an IDE that many have already used? If
By Jack, W8TEE <jjpurdum@...> · #88742 ·
Re: RPi C Development
Real programmers do not use IDE's or eat kisch. 8-/ _._ [email protected]> wrote:
By Arv Evans · #88741 ·
Re: RPi C Development
Arv: I was a little later than that and they were in the process of moving to VMS. Jack, W8TEE
By Jack, W8TEE <jjpurdum@...> · #88740 ·
Re: RPi C Development
Jack Last time I worked on a VAX machine was as recent as 1983. The OS for that particular set of machines was UNIX, ported to the VAX-7800 by Lachman Technologies. Arv _._ [email protected]> wrote:
By Arv Evans · #88739 ·
Re: RPi C Development
jack, pico is still a microcontroller without an operating system. the raspberry pi runs the ubuntu desktop operating system. you could run visual studio on it if you like to program in it. the Pi and
By Ashhar Farhan · #88738 ·
Re: RPi C Development
Jack, I've never liked IDE's, or GUI's in general, they create too much brain clutter. I just code in vi (or vim) and compile at a shell prompt, exactly as I did 40 years go. A rather obstinate
By Jerry Gaffke · #88737 ·
Re: RPi C Development
Jack Actually it is not that complicated. Most Linux systems have retained the UNIX core parts that you are familiar with. A few have had their names changed (ifconfig is now ipconfig and so on) to
By Arv Evans · #88736 ·
Re: Cheap Chinese Linear LPF
Jerry You are right. The inductors are the most likely culprits, as the core permeability varies a lot... I usually use this website ( https://rf-tools.com/lc-filter/ ) as reference for my filters (
By Rafael Pinto [PU1OWL] · #88735 ·
Re: Cheap Chinese Linear LPF
O Darned if I know. I just clicked on the Ebay listing :). I believe they are 5-element Chebyshev. The cap values seem to make sense, comparing to the standard tables in the back of the ARRL handbook.
By [email protected] <jerry@...> · #88734 ·
Re: Cheap Chinese Linear LPF
Rafael, Thanks for that link. Very informative. My measurements were not of the amp, but only the LPF. I might get inspired to build a new multi-band LPF using his 7-element design. The cheap LPF is
By [email protected] <jerry@...> · #88733 ·
Re: Cheap Chinese Linear LPF
Jerry, I wrongly wrote a message about your SWR, but thinking on the SWR of the amplifier input and not the LPF. Usually high SWR in the pass band of a filter means wrong adjusted impedances. How were
By Rafael Pinto [PU1OWL] · #88732 ·
Smooth non-erratic tuning without mad blinking.
I did it? for regular uBitx V6 and original firmware. Very regular behaviour of tuning knob, without erratic jumping and with also regular accelleration. And heavily reduced blinking while tuning.
By fyysik@... · #88731 ·