Tracker Scout

BillC

New member
Hi Denys, I cobbled up a very quick and rough version of your filter as we talked about, I too did not have exact values, but looking at the res Search ults I am sure that you are on the right track. As mentioned I changed the switching diode feeds to 4.7k The images show the filter, a sweep with no switching voltage, 14 volts on the psu, and the sweep with markers at 3mHZ and 4.5mHZ , The vertical scale is on 10 db divisions, I am sure that your neatly built filter block will work as planned . When Ray sweeps it that will prove it
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BillC

New member
Hi Denys, I listened to the net last night and to my ear the Tracker scout has nice crisp and clear audio, very easy to listen to, good luck.
 

Vk2jkn

New member
Hi denys, I wasn’t quite sure if you were talking about the tracker , now I’ve seen the progress. WOW , looks great mate , I’d be happy with 80m and 40m Denys … more than happy actually! Cheers jim
 

VK3ZYZ

Moderator
Staff member
Here is the latest code that cleans up the display a bit to remove most of the flicker.
Also, now has the encoder is using interrupts.
Finally, holding the encoder button down longer now moves the cursor right.
Short push, left, long push, right.
 

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VK3ZYZ

Moderator
Staff member
It is a while since I've played with the Tracker board.
There are some odd things going on but it turns out only one of the boards is at fault. I'm thinking RF is getting into the Arduino on one board. The main difference between the boards is the USB serial chips are not the same, but that may be a red herring.
The first board runs well, while the second chatters the radio's band relays while talking, and on the 14Mhz range, resets the frequency on transmit.
 

BillC

New member
Try running the Tracker from a fully charged 12 V battery "of cells" if not already? In the mobile installation it would see about 12.6 allowing for voltage drop due to bolted connections,fuse holder resistance , supply wire resistance etc. with battery terminal voltage on abt 13.8v. Just a few ideas , hope not too boring.
 

VK3ZYZ

Moderator
Staff member
Ah!
I had a code problem after all. I'd changed the band numbers but still had a reference to the old bands in a couple of places.
Here is the newest Version...
This fixes the USB/LSB switching as I had not tried USB.
And the band resetting is ok as per the note above.
The files are "A" as published, and "B" for the second board as the cal factor is different.

The second board may still be unstable, I'll have to test it.

To make the USB/LSB switch work, remove R9 and change R6 to 100R.
Then a switch between the input and 0V CN5 switches, open = USB, closed = LSB.
 

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BillC

New member
Also might be a problem due to surge impedance as a result of overall power supply source impedance over the instantaneous syllabic input bursts to the TX. Howzat for a bit of fun? If that were the case the b+ line at the TX would be varying at a modified audio rate. Try a scope across the TX b+ terminal while feeding in low frequency audio to the mic. input say 50 HZ . B+ should be flat on scope . Bit of muckin around, just an idea,I might be barkin up the wrong tree. Cheers.
 

VK3ZYZ

Moderator
Staff member
Now that the encoder is interrupt driven, it occasionally jumps when the TX is released.
Some 10nf 1206 surface mount caps to the rescue...
Photo on 19-01-2022 at 7.10 PM.jpg

I think it helps.
 
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