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Re: RF Board MAR-3SM+ biasing current
I have not had a look at that yet. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner ¨C Operator
By K9HZ · #32872 ·
Re: CAT
Hi John, the Teensy already supports, without hacks, 192k audio via the SPDIF port. I built a prototype Main board with SPDIF and it works.? So that's an alternative that bypasses hackage of the
By Greg KF5N · #32871 ·
Re: T41 SDT Code Issues
*** Not that much. Just a few bucks for an 8inch 10-conductor length. Digikey has 275 short ones for $1.48 apiece. 3M brand: 1700/10. But the system has to be designed for it. IDC connector with all
By jerry-KF6VB · #32870 ·
Re: CAT
Just catching up with all the T41 emails over the last couple of months.? Take a look at: https://github.com/laiudm/laiudm-Teensy4-192k-USB-Audio This supports 2 serial ports over USB and 192K USB
By John Melton · #32869 ·
Re: CAT
That's good, and it proves it is possible.? But that list of changes is really long!? In my opinion, support for that in the T41 will not go smoothly. Hopefully that capability can be added to
By Greg KF5N · #32868 ·
RF Board MAR-3SM+ biasing current
Just a thought. The MAR-3SM+ Amp used for the CW transmission was biased at fairly close to the recommended current of 35mA. But now that R73 is added across C73 this has resulted in a reduced biasing
By John G0SDF · #32867 ·
Re: T41 SDT Code Issues
My Ver 11 build had 6-7 inch display cable 3.3 volt too, never a glitch. Ver 12 had glitches and freeze ups with any code I used until I slipped some ferrite sleeves over display and front panel
By Tim · #32866 ·
Re: T41 SDT Code Issues
You can always request past tax returns from the IRS. Although - maybe not now. I hear they're a little short-handed. - Jerry, KF6VB
By jerry-KF6VB · #32865 ·
Re: CAT
Jerry, You might also want to look into the Wiki, particularly the section on USB Audio: https://github.com/K7MDL2/KEITHSDR/wiki/48KHz-USB-Audio And there is also the Keithsdr discussion group, where
By Joerg DB2OO · #32864 ·
Re: Excessive Noise
It¡¯s definitely either the PCM5102 or the PCM1808, or the circuitry around those parts (I¡¯ll bet you have a solder bridge or a bad part)¡­ and remember that could be at those parts or at the
By K9HZ · #32863 ·
Re: Excessive Noise
Thanks Bill.? I have done this with the RF board disconnected and the audio hat off and I get the same result. I'll try reinstalling the A/D and DACs but in the mean time, can I buy a set? Thanks for
By epif18@... · #32862 ·
Re: T41 SDT Code Issues
I've pondered this question as well.? My 4SQRP kit T41 has an 8-9" cable between the display and main board.? Besides a few glitches early on, which I think were software related, my display has
By Terrance Robertson, KN6ZDE · #32861 ·
Re: RF Board
Yes, thanks for sending...
By jjpurdum · #32860 ·
Re: T41 SDT Code Issues
I'll ask him, but I don't think he does. I have an infrared "gun" that I might poke around with. I'm gonna try the freezer thing too. Jack, W8TEE
By jjpurdum · #32859 ·
Re: T41 SDT Code Issues
I will give it a try. At this point, I would put salt on a swallow's tail if I thought that would work. I did back up my personal photos, but not my past tax records. I also had about 8 months work on
By jjpurdum · #32858 ·
Re: T41 SDT Code Issues
I can confirm the Hex code works fine, I have not explored all the options but it is working. I do have ferrite sleeves on display and front panel ribbon cables, that solved a lot of issues. Tim W4YN
By Tim · #32857 ·
Re: T41 SDT Code Issues
Jack, Put the failed drive in a zip lock bag, then that in another zip .lock bag. I usually put the double bagged drive in the freezer for at least 24 hours. Once you take it out of the freezer, you
By Larry - AC8YE · #32856 ·
Re: T41 SDT Code Issues
*** Does Al have a infrared camera? I saw a video where somebody fixed a dead SSD by imaging it - and quickly finding a shorted electrolytic. The shorted electrolytic got hot, and the camera saw it.
By jerry-KF6VB · #32855 ·
RF Board
Jack.. .you said you want a new V12 RF board? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch - K9ZC Staunton, Illinois Owner -
By K9HZ · #32854 ·
Re: Excessive Noise
Mark¡­ I¡¯m fully restocked with T41 boards¡­ latest revisions too. I have at least 100 of each board gearing up for Hamvention. Unplug the RF board so its just the MAIN board and see if it still
By K9HZ · #32853 ·