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Re: LPF-Control PCB TX Logic at U3 & U7
Yeah me either¡­ I have not spent more than 2 days in a row in our house in the last month due to conferences, vacation travels, contests, family events, etc. Hope this settles down before
By K9HZ · #33171 ·
Re: LPF-Control PCB TX Logic at U3 & U7
Bill: my new radio layout is prone to the display freezes, so I'd be happy to test one of your display buffers (5V) if you have any available for testing.
By Oliver KI3P · #33170 ·
Re: LPF-Control PCB TX Logic at U3 & U7
My radio is still offline as I rebuild it after the burning smell. Still waiting on a replacement Teensy to be delivered. So I'm not much help at the moment.
By Oliver KI3P · #33169 ·
Re: LPF-Control PCB TX Logic at U3 & U7
And this works perfectly on your radio¡­ correct Oliver? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner
By K9HZ · #33168 ·
Re: CW Side tone
Jerry, Yeah, That fixed it. Thanks, Paul M. KC2TVJ
By Paul Michel · #33167 ·
Re: LPF-Control PCB TX Logic at U3 & U7
I won¡¯t be able to test till Monday dave
By D Solt · #33166 ·
Re: LPF-Control PCB TX Logic at U3 & U7
The code that controls the LPF is here: https://github.com/KI3P/SDTVer066-9/blob/main/SDTVer066-9/LPF_Control_V12.cpp Can you try out version 66.9 of the code and see whether the problem persists?
By Oliver KI3P · #33165 ·
Re: LPF-Control PCB TX Logic at U3 & U7
Well¡­. What I can tell you¡­ working backwards towards the code, TX_BPF_SEL and RX_BPF_SEL, or GPA0 and GPA1 for U15 which is I2C address Hex 0x25 on WIRE2. GPA0: HI = BPF In Circuit During TX, LO
By K9HZ · #33164 ·
Re: LPF-Control PCB TX Logic at U3 & U7
Hey yall', I ran the LPF test .ino along with the K9HZ LPF Prototype Test Report using MAIN and all modes and functions pass.? So all LPF control board HW works with in-band loss for LPF about -0.5db
By epif18@... · #33163 ·
Re: Tiny Ten Transceiver
I have some but its stashed away in the office I¡¯m moving¡­ and of course, I just had a colonoscopy 4 hours ago¡­ so will find it in a few days. What I know is that we are at the limits of the
By K9HZ · #33162 ·
Re: Tiny Ten Transceiver
The DC operating point would seem to be that of Fig 1 of the data sheet for the PSA-8A+.? But that is fine, either way.? I was hoping to get some data on noise level data of other implementations of
By Bob Larkin · #33161 ·
Re: CW Side tone
Ok so what's the problem then? 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 Villa
By K9HZ · #33160 ·
Re: Tiny Ten Transceiver
¡°this puts 30+ dB of gain right ahead of the QSD?¡± no no no¡­ its operating at a voltage that provides much less gain¡­ Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
By K9HZ · #33159 ·
Re: Tx-Rx logic on LPF-Control
First, R8-R11 should NOT BE POPULATED under I2C control. U15 pins GPA0 and GPA1 should ALTERNATE STATE. NOTHING should be plugged into J1 unless it LISTENS ONLY. U3 and U7 appear to be working
By K9HZ · #33158 ·
Re: CW Side tone
*** It is. It's also one of the settings accessible by poking at the volume control knob switch. - Jerry
By jerry-KF6VB · #33157 ·
Re: CW Side tone
Why isn't this a menu item? 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 Villa
By K9HZ · #33156 ·
Re: Tx-Rx logic on LPF-Control
Folks who are having issues with PA oscillations, do you see it on the beta version of the Ver66-9 code? https://github.com/KI3P/SDTVer066-9 And if you, does it go away if you comment out this line
By Oliver KI3P · #33155 ·
Tx-Rx logic on LPF-Control
In my efforts to track a PA oscillation problem I noticed that in the SSB mode, the receive solid state switches (U1 & U8 on the LPF-Cntl) do not change state when the PTT is engaged but the transmit
By D Solt · #33154 ·
Re: Tiny Ten Transceiver
Thank you much for the comments.? This is all most useful in understanding the operation and limitations of QSD/Tayloe receivers. I went back and spent some time with theT41 schematics.? Q: Do you
By Bob Larkin · #33153 ·
Re: boards and kits and stuff
Sounds very interesting. Alas, I know nothing about FPGA, but wish I did. Jack, W8TEE
By jjpurdum · #33152 ·