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Hi fellows..............

No, we never got the 12 MHz signal investigated. Tausciam appears to be an exceedlingly CAUTIOUS fellow, and he wasn't willing to do "sniffing" with his only known-good rig an expesnive yaesu.....can't blame him if I were new at this....and the 12 MHz signal doesn't have the advantage of huge WIRING or a LARGE CIRUIT BOARD to act like antenna..... so he never heard it.


I'm not sure why some have concluded that the Raduinio is guaranteed to be broken--- when he was able to hear the 26MHz signal! That would have been created by the Raduino and woud suggest the Si5351 was able to synthesize at least some frequencies --- then he furthered that by picking up several signals in the 4.8-4.9 range --- THROUGH AN EXTERIOR DIPOLE OUTSIDE HIS HOUSE and against background atmosspheric noise and other signals....

Something seems to happen when it gets PLUGGED INTO the bitx and we can't be certain of what. y'alls investigations so far haven't found any explanation for shorting out or whatnot---but it still might be happening.


We're all a bit limited because Tausciam is doing the best he is willing and knowledgeable enough to do and that level is growing, but still not quite able to test some things yall (and I) would like to see happen.

Who knows, maybe I'll be able to do a few more tests when the rig arrives and publish the results and y'all can guide us expertly and efficiently to the cure. I was helping out someone recently and when I finally got to SEE what they were doing.....there were a zillion little issues they were having that had not even yet risen to the surface....when we conquered those, they wre able to make a lot mmore progress. A 2nd set of eyeballs here might help, might not, we'll see soon.

Another thing: once Tausciam has TWO working rigs in his house, and I may be able to add a few shunt options to the bandpass filter --- he may become much more willing to "sniff" using a castaway Bitx40 for his sniffing receiver! I think his detective skills will jump several more levels in the coming month or so. And his daughter is soon having a working rig and they'll get use d to the little idiosyncracies of the bitx platform and be more able to deal with whatever we're able to get working.

Ah, patience & forebearance --- what virtues, and so many times I've not exhibited them!!!


________________________________________
From: [email protected] <[email protected]> on behalf of ron van doremalen (PA3FAT) <ronvandoremalen@...>
Sent: Thursday, December 21, 2017 10:17 AM
To: [email protected]
Subject: Re: [BITX20] Help! I think I may have just ruined my 9 year old's Chanukah

Vince,



Read that, but hope we still have time to inspect 12Mhz before he goes to the post office ?



Just watched the trouble shooting video, nothing about checking 12Mhz. The L5 seems a piece of wire. C103.....where is it....



OT: Last day : switching jobs? If so have fun in your new job if that is the case, if not, sorry !







-----Oorspronkelijk bericht-----

Van: [email protected] [mailto:[email protected]] Namens Vince Vielhaber

Verzonden: 21 December, 2017 16:10

Aan: [email protected]

Onderwerp: Re: [BITX20] Help! I think I may have just ruined my 9 year old's Chanukah





We won't be finding out much of anything for a few days, at least. He's sending it to Gordon per Gordon's post a little while ago.



Vince.

Vince,

Found a small picture that indeed shows C103 and L5 are no longer

visible on the board.

Let's see if we can identify if there is a 12Mhz signal. If he hears

4.5-4.9 (even weak) that's the only missing signal so far.

-----Oorspronkelijk bericht-----

Van: [email protected] [mailto:[email protected]] Namens Vince Vielhaber

Verzonden: 21 December, 2017 16:03

Aan: [email protected]

Onderwerp: Re: [BITX20] Help! I think I may have just ruined my 9 year

old's Chanukah

Depending how new the BitX is, there may not be a variable cap. It

was eliminated at some point, although still on the schematic. Not

sure what/where L5 is, I no longer have the schematic on this computer.

Today's my last real day so it's all cleaned off.

Vince.

Measure the values of Q10 and Q11 on all three legs of the transistor.

Could give indication if supply voltage is ok at that point, and if

the transitors are bad.

Is C103 the variable capacitor looking ok? L5 inductor looking ok, no

loose at any end, e.g. broken wire?

These are all involved in the 12Mhz oscillator.

-----Oorspronkelijk bericht-----

Van: [email protected] [mailto:[email protected]] Namens ron van

doremalen

(PA3FAT)

Verzonden: 21 December, 2017 15:54

Aan: [email protected]

Onderwerp: Re: [BITX20] Help! I think I may have just ruined my 9

year old's Chanukah

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.

--

Michigan VHF Corp.

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Michigan VHF Corp.