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Game on. Numerous stations in the neighborhood around 1340z.? Could not get discern the calls.?

Brian N
N7BKV

Stock QCX-17 on 12m, near 24891 kHz.
Nothing heard and no RBN spots...yet !
72 / 73,
Bill, N4QA

The stock QCX-17 is calling CQ, just above 24891 kHz at 200 milliwatts to the GADS! antenna.
No takers, so far... :0)
72 / 73,
Bill, N4QA

At 1326 on 7029.90 or so about three stations.? Lots of QRN, QSB.

Brian N
N7BKV

11dB spot from VE6JY.? 1152 Miles.? But cannot find any? QCX CW.

Brian N
N7BKV

I have been on 7030 since 1300 UTC.? Only faint indiscernible singals.? Possibly SSB from Far East.? Will keep trying.
QTH California
GL

Brian N
N7BKV

A new chat has been created:

If anyone is looking at this chat, I'm setting up for 20m for the first session at 13:00Z
I can't use 14.060 because of a continous solar panel QRM, so I will be a bit hgher ... 14.061 or up
GL all
Luc - ON7DQ

View/Join This Chat

Hello M0RON,

Sunday, April 28, 2019

I had TVI from my LF set up and it turned out to be a faulty wide
band amp up in the loft, for the UHF antenna that feeds several rooms
in the house. It was a cheap no name brand, changing it for a
reputable make fixed it instantly. Just an idea, do you have a TV
aerial pre amp installed?


Best regards,
Chris 2E0ILY mailto:chris@...


M> Anyone else had their u3s cause interference to digital tv?
M> I have 4 u3s, two of which cause TV interference, when they are
M> actually transmitting the interference is quite bad, but even
M> between transmissions blocking occurs.
M> Satellite TV reception not affected not streaming, just terrestial digital tv.
M> Andy



--
Best regards, Chris Wilson (2E0ILY)

I think the first session will be 13:00z
Zdenek
OK2BQN

I thought I had gone looking, but I missed that one... Thank you!

Aaron
KG5TNI

Chris Wilson 29 April 2019


A friend is wanting to get onto MF but has a tiny garden, so I am
allowing him to work portable from my fairly large site and aerial. He
will use my U3S to drive a G0MRF 300W MF Class D amp. The build notes
say this:

"A signal at twice the desired frequency is applied to the input
connector. (1) This is AC coupled to the clock input of a CMOS 4013
D-Type flip flop. Potential divider R1 and R2 hold the clock input
just below its switching point of 6V DC. Any signal from C1 exceeding
apx 2.5V p-p will clock the circuit correctly. In practice any output
from 3.3V to 12V logic, or an input from 5 to 50mW from a 50 ohm
source can be used"

I believe my U3S built without any of the output driver stage has not
enough output from the square waves from the CLK0 pin, what do I need
to do to up it to drive the amp suitably please? I don't really want
to add the driver stage as i use it "as is" for my own LF passion,
driving a 1kW W1VD Class d amp directly from CLK0. Thanks.

is the link to the MF amp

is the link to the LF amp i
currently drive direct from CLK0



--

2E0ILY
Best regards,
Chris mailto:chris@...



--
Best regards, Chris Wilson (2E0ILY)

Hello Hans,

Friday, April 26, 2019

Thanks very much Hans, appreciated!


Best regards,
Chris 2E0ILY mailto:chris@...


HS> Hi Chris


HS> Yes. Should be fine.


HS> 73 Hans G0UPL?
HS>


HS> On Fri, Apr 26, 2019, 01:24 Chris Wilson <chris@...> wrote:

HS> Chris Wilson 25 April 2019
HS>
HS>
HS> I want to drive a class D amp that needs double the desired frequency
HS> input. I am away at the moment with no access to the U3S, will they TX
HS> at around 950kHz to allow the halving by the amp, and with X2 enabled,
HS> for WSPR TX? Output taken direct from CLK0. Thanks.
HS>
HS>
HS>
HS> --
HS>
HS> ?2E0ILY
HS> Best regards,
HS> ?Chris? ? ? ? ? ? ? ? ? ? ? ? ? ? mailto:chris@...
HS>
HS>
HS>
HS> --
HS> Best regards, Chris Wilson (2E0ILY)
HS>
HS>
HS>
HS>
HS>



--
Best regards, Chris Wilson (2E0ILY)

>Hi all, is it possible in some way to connect the telegraph key to the ULTIMATE 3S, in order to use, not as a beacon, but as a CW telegraph transmitter?

Hi Ken,

Yeah I think the thread had moved on a bit.

I was only referring to the original question.

Had me thinking myself for a bit about the CW option and wondering if I'd missed anything.

73 de Andy

I will be QRV ON 40m for at least the 1st session 0900z, due to the possible influx of ops during this time, I won't be on 7030, but near it. I plan on calling 'CQ QCX' hopefully that's sufficient. I just set up the antenna on the fence and ran the transmission line...and it's 37F outside...so no excuses from me hihi.?
Steve Raas?
N2JDQ?
FN13DD

I just built my QCX and everything seems great! Boot with no issue and it linked and synced with my GPS unit.

However, when adjusting for Phase-Lo on R24, I get the minimum at the full counter clockwise (left) rotation. Turning clockwise results in a higher reading, and a louder tone when tested with (out of my ears) earbuds. I feel that if I could somehow move the resistance further then I would find a true minimum, but I'm not sure how to go about that. Or is this okay where it is?

Visual inspection of the joints shows what I think are all pretty good joints, and I continuity tested all the toroids from solder to solder, so I'm fairly certain that those are at least not open circuits.

Any help would be greatly appreciated!

Aaron
KG5TNI

U3s B causes partial tvi, probably when TV signal is low. Sky TV not affected only terrestial digital tv.
U3s C causes tvi whenever the tv is on. C is in a weak TV reception area. Bands causing tvi are 40, 20, 15 and 12.

Andy,

Presumably the problem is due to harmonics from the square wave from the Si5351 getting out of the U3.
TVs these days are pretty good at rejecting QRM except that actually on their RX frequency. U3 power levels are unlikely to make problems.
Do you still get trouble when TX into a dummy load?
But fundamentally it seems to me you need to make sure the U3 is screened with VHF filtering to all connections. If it is going up the antenna coax maybe just a turn on a suitable ferrite could stop it.

73 Alan G4ZFQ

An update.?
U3s A causes no tvi, the tv reception at that location is sky.
U3s B causes partial tvi, probably when TV signal is low. Sky TV not affected only terrestial digital tv.?
U3s C causes tvi whenever the tv is on. C is in a weak TV reception area. Bands causing tvi are 40, 20, 15 and 12. Neighbours not affected. TV loses pictures and sound.
All u3s are identical, electrolytic across power input, caps across voltage regulators on input and output, separate regulators for logic, heater and pa.
Andy
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.

Hi Andy,?
you need to read the whole thread.
It is the ability to freely change frequency in CW mode using the 'potentiometer tune' modification that does not work. The CW mode in v3.12a requires no modifications and yes, that bit does work.

73 Ken G4APB