开云体育

Hello again Bill here N3GTY. Even without a PC the QDX should initialize with rapid flashes of the LED indicator. I have tried this QDX on both Linux and Windows with the same results. Sound Card Found. Serial Port Found. Putty terminal will not allow me access the QDX configuration in Ubuntu or Windows. Not able to access the QDX for Cat control. And yes I tried different USB Cables and power supplies. The OS of the computer should have no bearing on the QDX initializing. I checked the QDX soldering pads very closely for bridges etc. The only post that I found with the same problem that I have here has no resolution as of yet. Thanks much for your input. I am thinking corrupt PIC chip but I will keep looking bye for now Bill N3GTY?

Many thanks!? After several hours of sequencing and many options, your suggestion of TS-480 it is now WORKING!??

Wow, that was an ordeal...but it looks like all ok, now for my first QSO.

Mitch, w2msk

开云体育

Walt,

Whew ! Mags asked me sweetly to also mow her front yard and I couldn't resist so took a bit longer to finish.
Thw XYL is on a sewing trip with best friend? ? ? G? ? ?L? ? O? ? R? ? ?i i i i i? i i? ? G L O R I A? ? ? ?GLoooooooooooria !
Anyhow, we're back on 20 FT8
--
72,
Bill, N4QA

开云体育

Mitch,

Just starting with JS8Call and QDX.? However, the above sequence is not working for me.? FT8 works OK.? I see the correct Port/audio but NO QDX in the radio options...any other suggestions, tried multiple sequences,?? Win10 and new QDX as of June '23.? Thks

On Mon, Jul 17, 2023 at 02:41 AM, Hans Summers wrote:

5) On all the units I had, the 29?+ 9 turn L401 (as per current manual), the turns had to be fairly much fully spread out, to get the 20, 30 and 40m BPF peaks correct. It may even be worth using 29?+ 8 turns for L401. We'll see.?

Hi Hans. This is great information to have.? Thank you.? One question, however.? The photo in the manual shows the 9 turns to be spread out but the 19 turns to be not so spread out.? Do you mean that you had to spread out both sections?? I found that when I spread out the 19 turns, the RF sweeps got worse (but I was battling a second simultaneous issue at the time).? Just to be clear, do you mean to spread out both or just the 9 turns?

73, Mike KK7ER

Bruce,

I played with the windings, especially for the 30/20 LPF.? I saw absolutely NO CHANGE in the power output, whether compressed or separated.? 20m power output is only about 0.25 watts.? I've also carefully recounted turns on all toroidal.

Walt

Thanks, Paul.?
--
73, Dan? NM3A

Worth remembering the PA output is unlikely to be 50 ohms? so a VNA check is useful but don't sweat the details if you're getting plenty of power through it . .? ? ?If not play with the windings?

ps . . . Even a 32 ohm loudspeaker works so well on the QCX+5W headphone output I had to put put another resistor in series to keep the volume down . .?

Jeff,

IIRC, Hans said it didn't matter much.
His mod page says "swapping the capacitors to correct this mistake (which?I have done, and is implied in the analysis below) does NOT materially improve the receive band pass filter response on 20m".

I have not swapped them yet and I'm getting 3.5W out on 20m.

73, Mike KK7ER

Jeff,

The capacitor values were swapped in an early version of the assembly manual.? If you built from a more recent version of the manual, no need to correct.?

Walt

John,?
Thanks for the explanations and SPICE simulations. I'm going to study all this. Amazing what I learn from these kits!
--
73, Dan? NM3A

I tested my LPF sections with a Nano VNA, and all the frequency plots look good to me.? In fact, the 40m LPF looks to be right at the bottom of the 40m band, but the power output on 60m is 4.5 watts and 40m is 0.6 watts.? I hope someone can lead me in the right direction as to what to check next.






Thanks,

Walt - KK4DF

OK, John & David & anyone else even mildly interested.
Back in a couple of hours !

72,
Bill, N4QA

On Mon, Jul 17, 2023 at 2:13?PM John Zbrozek <jdzbrozek@...> wrote:

Roger that, Bill!

I am away from the home QTH right now , else a QSO attempt would be made.
Maybe sometime soon I will hear and connect with your mWatts level
signal!...JZ KJ4A

On Mon, Jul 17, 2023 at 2:08?PM Bill, N4QA <n4qa@...> wrote:

QSL, John.
I'm seeing 16 reception reports, anywhere from -16 to -23 dB SNR.
May shut down temporarily while I mow Maggie's ( 7 y.o. Springer Spaniel ) Klawk Bawl Field...it's an inside thing :0) !
She LOVES her KLAWK BAWL...actually a Chuckit Ball & TAWSER ( tosser ).
72,
Bill, N4QA

Roger that, Bill!

I am away from the home QTH right now , else a QSO attempt would be made.
Maybe sometime soon I will hear and connect with your mWatts level
signal!...JZ KJ4A

QSL, John.
I'm seeing 16 reception reports, anywhere from -16 to -23 dB SNR.
May shut down temporarily while I mow Maggie's ( 7 y.o. Springer Spaniel ) Klawk Bawl Field...it's an? inside thing :0) !
She LOVES her KLAWK BAWL...actually a Chuckit Ball & TAWSER ( tosser ).
72,
Bill, N4QA