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DC Receiver

 

Forgot.? Here is board layout for the DC receiver.? Gerbers at 11.

k7qo-dc-receiver.jpg

 

Chuck:

This looks like a nice, clean PC board layout, and thanks for sharing
your work with us on this group!

Just a comment- looking at the layout, are you intentionally letting pin
1 of the NE602 "float"?? Maybe it would be preferable to bypass it to
ground (for RF, not DC); perhaps with something like a 0.1 ufd cap?

Mike N4MWP

On 3/23/25 10:52, chuck adams via groups.io wrote:
Forgot. Here is board layout for the DC receiver.? Gerbers at 11.
 

Hi Chuck,
I haven't been following this thread.? Where do I find the schematic and BOM for the DC RX?
Thanks !
Jim WB4ILP?

On Sun, Mar 23, 2025, 10:52 AM chuck adams via <chuck.adams.phd=[email protected]> wrote:
Forgot.? Here is board layout for the DC receiver.? Gerbers at 11.
 

Thread just started and already have one correct.? Schematic and BOM to be
found or reconstructed later today.? Just finished a Manhattan board for
the other project in progress.? Stay tuned.

On 3/23/25 10:56, Jim WB4ILP via groups.io wrote:
Hi Chuck,
I haven't been following this thread.? Where do I find the schematic and BOM for the DC RX?
Thanks !
Jim WB4ILP

On Sun, Mar 23, 2025, 10:52 AM chuck adams via groups.io <> <chuck.adams.phd@...> wrote:

Forgot. Here is board layout for the DC receiver.? Gerbers at 11.
 

I'll add the cap.? Don't remember at the time it being an issue.

On 3/23/25 08:55, Mike Dinolfo via groups.io wrote:
Chuck:

This looks like a nice, clean PC board layout, and thanks for sharing
your work with us on this group!

Just a comment- looking at the layout, are you intentionally letting pin
1 of the NE602 "float"?? Maybe it would be preferable to bypass it to
ground (for RF, not DC); perhaps with something like a 0.1 ufd cap?

Mike N4MWP

On 3/23/25 10:52, chuck adams via groups.io wrote:
Forgot. Here is board layout for the DC receiver.? Gerbers at 11.
 

Thank You Chuck !? ?I'll be watching.? I want to build the DC RX Manhattan style.
I just ordered a few NE602 and NE612 from AliExpress.? I hope they are genuine.
Jim WB4ILP?

On Sun, Mar 23, 2025, 4:27 PM chuck adams via <chuck.adams.phd=[email protected]> wrote:
Thread just started and already have one correct.? Schematic and BOM to be
found or reconstructed later today.? Just finished a Manhattan board for
the other project in progress.? Stay tuned.

On 3/23/25 10:56, Jim WB4ILP via wrote:
> Hi Chuck,
> I haven't been following this thread.? Where do I find the schematic
> and BOM for the DC RX?
> Thanks !
> Jim WB4ILP
>
> On Sun, Mar 23, 2025, 10:52 AM chuck adams via
> <> <chuck.adams.phd=[email protected]> wrote:
>
>? ? ?Forgot. Here is board layout for the DC receiver.? Gerbers at 11.
>
>
>
>
>
>






 

Jim,

I have to go back into the bat cave to find what I need.? It's not on my current
drives and I have an old computer in a cabinet to dig out.? Then I have to
go through the DVD collection to find the old stuff.

This will take time and may take a day or two.

There may be a better alternative.?? Those interested, form a search party.
Go to archive.org and the wayback machine and search for k7qo.net and
k7qo.com.? Some the snapshots do not grab all the material.

We did the DC project on qrp-tech.io and the posting there may help.
Surely, someone on this group has the documents and you may fell
free to put them in the files section for those interested.

Another option.? Search the internet for DC receivers and there are a number
of candidates for the project and I recommend modifying to allow the use
of the new digital VFOs.? QRPGuys,? KitsAndParts and QRP-Labs to start a
list of DDS VFOs available for a multitude of projects.? Let lose the hounds.

FYI


BTW.? Jim is in charge.....? :-)

On 3/23/25 14:07, Jim WB4ILP via groups.io wrote:
Thank You Chuck !? ?I'll be watching.? I want to build the DC RX Manhattan style.
I just ordered a few NE602 and NE612 from AliExpress.? I hope they are genuine.
Jim WB4ILP
 

Chuck and Group et al...
?
I still have the files from the old qrp-tech Winter 2018 Project #4 "The K7QO DC Receiver".
?
I have both the original and the R2 version.
?
Chuck would you like me to send them to you for review before I post them here?
?
BTW, it is so great to see you back with us!
?
Tom - N8TPN
 

If you don't mine, send away.

ciao dude,

chuck

On 3/23/25 18:35, Tom, N8TPN via groups.io wrote:
Chuck and Group et al...
I still have the files from the old qrp-tech Winter 2018 Project #4 "The K7QO DC Receiver".
I have both the original and the R2 version.
Chuck would you like me to send them to you for review before I post them here?
BTW, it is so great to see you back with us!
Tom - N8TPN
 

OK Chuck,
?
A private message is winging it's way to you with the files attached.
?
Tom-N8TPN

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