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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 ·
Re: RF Board update.
With the addition of the following: 1. Change the following capacitors to 20pF - C33, C37, C46, and C54 2. Replace capacitors C35, C48 to 0 Ohm resistors (eg jumpers). Just mount them on top of the
By K9HZ · #32852 ·
Re: Excessive Noise
Hey yall' I've tried everything I can think of.? The pulsating noise corresponds to the sclk signal (pin 13 led which also pulsates) which seems to be modulated by the spectrum update rate that is
By epif18@... · #32851 ·
Re: T41 SDT Code Issues
I have the C boot drive which is a SSD, but only 500G, my D drive, which holds everything and is 1 TB and the drive that died, and drive F which is a 2T hot-swap backup drive. D no longer shows up in
By jjpurdum · #32850 ·
Re: RF Board update.
In terms of reworking an existing board it looks like I need to: 1. Remove U19, U20, U22 and U23 along with associated capacitors (capacitor removal looks optional as they are no longer connected).?
By Greg, KM5GT · #32849 ·
Re: T41 SDT Code Issues
It seems to be a combination of things (not just one)¡­ weak SPI line drivers on the Teensy T4.1 and cross-talk (capacitive coupling) between the data lines that gets worse as the cables get longer.
By K9HZ · #32848 ·
Re: T41 SDT Code Issues
*** That sucks. Did it die completely, or just lose data? Sometimes they can be read by putting the drive in the fridge. I have a unique system. I don't keep anything important on my desktop PC.
By jerry-KF6VB · #32847 ·
Re: T41 SDT Code Issues
What would be the cause of the display issues when some of us have ribbon connectors to the display that are 4-5" long? Jack, W8TEE
By jjpurdum · #32846 ·
Re: T41 SDT Code Issues
*** Like the Ubitx. Good idea. - Jerry, KF6VB
By jerry-KF6VB · #32845 ·
Re: T41 SDT Code Issues
If a new main board was designed... I think I would do what John did... sort of... I would put the main board right on the back of the display. That way there is no display cable. The thing is already
By K9HZ · #32844 ·
Re: T41 SDT Code Issues
If we were to redesign the Teensy - or just do a Main Board with a directly soldered iMXRT1062 - I'd want to free up the JTAG port for *hardware debug*!!!! It would speed up software development by an
By jerry-KF6VB · #32843 ·