Was remark nr 8 by think Gordon indeed.
If the 12Mhz is not working it will do nothing.
Using external antenna is not the way to go. Just take piece of coax with PL259 put into the monitoring radio (any HF general coverage receiver will do, even any radio cable of receiving shortwaves as long as 5Mhz and 12Mhz are on it).
Extend the other end of the cabling near the Raduino board. A short piece of inner cabling from the coax made blank. 3-5 cm (1-2 inch) open and not connected to the braid. You should be able to hear 12Mhz and 4.5-4.9Mhz clearly on the received. If one of them is missing, you found the cause of the malfunctioning, at least are getting very very close.
Ron - PA3FAT
-----Oorspronkelijk bericht-----
Van:
[email protected] [mailto:
[email protected]] Namens Vince Vielhaber
Verzonden: 21 December, 2017 15:49
Aan:
[email protected]Onderwerp: Re: [BITX20] Help! I think I may have just ruined my 9 year old's Chanukah
We never got that far since we weren't getting anything out of the raduino, or not that we could tell. It was one of the tests Gordon wanted him to do but it didn't happen.
Vince.
Did we verify that the 12mhz signal is working, did we hear this?
If this crystal isn?€?t working we can generate any signal into the
BITX40 but we will have no luck receiving anything as there will me
nothing to mix with.
Ron ?€¡° PA3FAT
Van: [email protected] [mailto:[email protected]] Namens ron van
doremalen
(PA3FAT)
Verzonden: 21 December, 2017 15:31
Aan: [email protected]
Onderwerp: Re: [BITX20] Help! I think I may have just ruined my 9 year
old's Chanukah
C6 is indeed supplying the dds signal to the bitx40. Clk1 is unused
and not doing anything in this radio. uBitx probably will use this.
You still have L4 on your board where the bitx40 is connected to the DDS?
Or is this space already empty on the newer boards?
If you hear the 4.5-4.9 signal how close is the antenna cabling into
your monitoring radio away from the DDS board? Does nearing (NOT
touching) the DDS board increase the signal?
Still the C6 is a concern in soldering?€??€?leaving very little wire
to act as an antenne to receive the 4.5-4.9 signal into the monitoring
radio.
Could you post a picture of the display so we can see where the
display is stating the receive frequency on the BITX40. Assume 7-7.4 Mhz.
Ron ?€¡° PA3FAT
Van: [email protected]<mailto:[email protected]>
[mailto:[email protected]] Namens ron van doremalen (PA3FAT)
Verzonden: 21 December, 2017 15:20
Aan: [email protected]<mailto:[email protected]>
Onderwerp: Re: [BITX20] Help! I think I may have just ruined my 9 year
old's Chanukah
Tausciam,
Would you be able to inspect the bottom of where the DDS enters the BITX?
So we are sure there is not shorting there?
Or maybe just make some picture of the top where you connected the
connector with the black/brown coming from the DDS board (from the
connector on the back of the Raduino)?
In the meantime will check the schematics if CLK0 pin and C6 are the
ones going towards the BITX40 (again).
Ron ?€¡° PA3FAT
Van: [email protected]<mailto:[email protected]>
[mailto:[email protected]] Namens
tausciam@...<mailto:tausciam@...>
Verzonden: 21 December, 2017 15:02
Aan: [email protected]<mailto:[email protected]>
Onderwerp: Re: [BITX20] Help! I think I may have just ruined my 9 year
old's Chanukah
On Thu, Dec 21, 2017 at 05:51 am, ron van doremalen (PA3FAT) wrote:
Could you verify underneath the bitx board where the DDS signal
get?€?s into the board that there is no shorting of the pins?
And it is not accidently connected backwards (probably the connector
prohibits this?€?.)
Something is reducing your generated signal if you hear something on
4.5-4.9 Mhz it is the only option left.
You need more signal that?€?s sure.
The board is raised up with the standoffs. Nothing can touch it.
As far as being connected backwards, there are two grooves on the
edges of the connectors. They fit on rails on the board. So no...can't
be accidentally flipped and fit.
You can hear the signal, but only if you force the raduino to output
at that signal. If you try to tune the raduino and hear a signal, you
don't hear one anywhere.
--
Michigan VHF Corp.
