Date   
D4D: Accessories Ideas

Adam Rong
 

Folks,

I put a photo regarding accessories here. Also it can be found in the Photos section under this album:
https://groups.io/g/crkits/album?id=90325

The Y audio adapter is useful when your computer has only one audio connector. Normally it is a combined 4-pin connector for microphone and headphone and it is the same as the connector on your cell phone. The Y adapter will split into two separated connectors for microphone and headphone, and can be connected to D4D using supplied audio cables. It is now orderable from http://crkits.com, in D4D Frequency and Option drop down list. The price is 5 USD. Note that this adapter won't work on MacBook Air. I haven't tested MacBook Pro, but Apple users, you can consider the following Creative SoundBlaster Play!3.

The Creative SoundBlaster Play!3 is a great companion to D4D. Although it is the low end in Creative external USB soundcard product line, it offers great SNR up to ~93dB and strong output to be able to drive 300 ohm big headphones. The big output range will offer flexibility to pursue big power or better IMD. The Creative SoundBlaster Play!3 can be ordered in most of the countries. I don't offer it. The price is around 25 USD. It can replace Y audio adapter.

I always wanted a light weight batter pack to give me more than 5 hours of operation. I soldered the DC plug to the 3x AA size battery holder with power switch, put in 3x 14500 sized (same as AA size) Li-Ion batteries of 1200mAh and it will give me 8 hours of operation. The power switch is very useful as D4D does not have one. The charging can be easy if you have a charger of 12.6V 1A. What you need is just an adapter cable. I haven't decided whether I should offer it but so far I like it because it is so handy. Even I offer it (battery holder, charger, adapter cable), you guys need to buy batteries in your country. I am not sure if it is possible.

Thanks,
Adam

Re: D4D: Test 30m JS8CALL

Adam Rong
 

Thanks Rod. I have the kits ready to ship tomorrow.

Thanks,
Adam

New file uploaded to crkits@groups.io

crkits@groups.io Notification <crkits+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the crkits@groups.io group.

File: d4dpartlist20190526forMP_80_40_30_20.xls

Uploaded By: Adam Rong

Description:
Part List for 80m (3573), 40m (7074), 30m (10130) and 20m (14074) all. Removed C23 in this version.

You can access this file at the URL:
https://groups.io/g/crkits/files/D4D%20Kit%20Documentations/d4dpartlist20190526forMP_80_40_30_20.xls

Cheers,
The Groups.io Team

New file uploaded to crkits@groups.io

crkits@groups.io Notification <crkits+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the crkits@groups.io group.

File: d4dschematic20190526for80_40_30_20.xps

Uploaded By: Adam Rong

Description:
D4D Schematic for 80m, 40m, 30m and 20m band. Use Internet Explorer to open this file.

You can access this file at the URL:
https://groups.io/g/crkits/files/D4D%20Kit%20Documentations/d4dschematic20190526for80_40_30_20.xps

Cheers,
The Groups.io Team

Re: New file uploaded to crkits@groups.io

Faisal Akber (VA3SFA)
 

Hi Adam,

Thank you for uploading the schematic diagrams. Unfortunately I am unable to read XPS files. I run Linux and XPS only seems to work on Windows.

Could you kindly please upload a PDF version of the schematic diagrams? PDF files work everywhere.

Thanks,
Faisal VA3SFA

On 2019-05-26 14:53, crkits@groups.io Notification wrote:
Hello,
This email message is a notification to let you know that a file has
been uploaded to the Files area of the crkits@groups.io group.
FILE: d4dschematic20190526for80_40_30_20.xps
UPLOADED BY: Adam Rong
DESCRIPTION:
D4D Schematic for 80m, 40m, 30m and 20m band. Use Internet Explorer to
open this file.
You can access this file at the URL:
https://groups.io/g/crkits/files/D4D%20Kit%20Documentations/d4dschematic20190526for80_40_30_20.xps
Cheers,
The Groups.io Team
Links:
------
[1] https://groups.io/g/crkits/message/2626
[2] https://groups.io/mt/31798857/300062
[3] https://groups.io/g/crkits/post
[4] https://groups.io/g/crkits/editsub/300062
[5] https://groups.io/g/crkits/leave/defanged

Re: New file uploaded to crkits@groups.io

Adam Rong
 

I have put a JPG version in Photos.

Thanks,
Adam

在 2019年5月26日,下午11:21,Faisal Akber (VA3SFA) <faisal@...> 写道:

Hi Adam,

Thank you for uploading the schematic diagrams. Unfortunately I am unable to read XPS files. I run Linux and XPS only seems to work on Windows.

Could you kindly please upload a PDF version of the schematic diagrams? PDF files work everywhere.

Thanks,
Faisal VA3SFA

On 2019-05-26 14:53, crkits@groups.io Notification wrote:
Hello,
This email message is a notification to let you know that a file has
been uploaded to the Files area of the crkits@groups.io group.
FILE: d4dschematic20190526for80_40_30_20.xps
UPLOADED BY: Adam Rong
DESCRIPTION:
D4D Schematic for 80m, 40m, 30m and 20m band. Use Internet Explorer to
open this file.
You can access this file at the URL:
https://groups.io/g/crkits/files/D4D%20Kit%20Documentations/d4dschematic20190526for80_40_30_20.xps
Cheers,
The Groups.io Team
Links:
------
[1] https://groups.io/g/crkits/message/2626
[2] https://groups.io/mt/31798857/300062
[3] https://groups.io/g/crkits/post
[4] https://groups.io/g/crkits/editsub/300062
[5] https://groups.io/g/crkits/leave/defanged

D4D: 80m 3.573MHz orderable

Adam Rong
 

Folks,

Besides 30m 10.130MHz for JS8Call, I have tested building 2 kits this weekend and I am ready to take orders for 80m 3.573MHz for FT8. Although the propagation is not good for 80m in Summer, Countries like Australia and New Zealand might have some chance to communicate. Also, this kit can be a replacement for 80m ARDF transmitter if you connect an audio source of CW tone considering its low price (I haven't tested yet but I assume it is useful on this purpose). Please place order directly from:
http://crkits.com

Thanks,
Adam

Re: D4D: Accessories Ideas

mlange
 

The link in the "It is now orderable from" line doesn't work here, FYI. 

Re: D4D: Accessories Ideas

Adam Rong
 

Thanks for pointing out. It should be:
http://crkits.com

Thanks,
Adam

在 2019年5月27日,下午11:24,ka4bka@... 写道:

The link in the "It is now orderable from" line doesn't work here, FYI. 

<Broken link.jpg>

D4D: 2nd shipment

Adam Rong
 

Folks,

I just shipped the 2nd lot yesterday. The tracking numbers are updated partially. I will complete it tonight.

Thanks,
Adam

Re: D4D: 2nd shipment

Adam Rong
 

I just updated all the tracking numbers in the 2nd shipment. Now I focus on improving the full manual.

Thanks,
Adam

Re: HF DF Receiver

Adam Rong
 

Melvyn,

If you download the manual, you will see the modification to 40m. Following the same rule, you will need to modify the magnetic rod coil tank, the preselector, but you don't have to modify the oscillator as the default frequency is 1/2 of the working frequency.

R3500D English manual including part list, modification instruction to 40-meter band and photo of the PCB assembly

Thanks,
Adam

The perfboards

Jack Margolis
 

Adam.

I like perfboards but have never seen one like the one you used to build your DSB FTB rig.
Any clue on how to find one like that?

Re: The perfboards

Adam Rong
 

The perf board is designed and customized by myself. I call it Choc perf board. If you need samples, please PayPal to rongxh@... 2 USD each, plus shipping 5 USD each time.

This article about this perf board was published in Amateur Radio magazine in Wireless Institute of Australia, FYI.
http://crkits.com/chocperfboard.doc

Thanks,
Adam

在 2019年5月29日,上午2:39,Jack Margolis <jmargolis9@...> 写道:

Adam.

I like perfboards but have never seen one like the one you used to build your DSB FTB rig.
Any clue on how to find one like that?

Re: The perfboards

Rob <roomberg@...>
 

Welllllll  ....yes... its official.... I am not qualified to operate this appliance.



I had some Choc Perf Board here that I thought would be good for experimenting with
rotary encoders.

Seemed simple enough.
I had snapped them apart and was playing with just one  of them
and I saw what looked to me like 8 completely isolated pads ....what you see here in the GREEN circle.

Boy was I wrong.
I had soldered a 3 lead rotary encoder into the purple marked pads and added 3 yellow wires to play with GROUND and A and B in the
rotary encoder example sketches.
This failed to get the desired results and kicked this for 2 weeks.... using various encoders......
and then yesterday I used an ohmmeter to figure where I might be shorting out my soldering.
And then found there is a sandwiched layer where the RED and BLUE are.

I don't get it.......
why the hidden layer?
Why not have the traces all connected on the solder side of the board where you can see it?

73 Rob KB3BYT



On 05/28/2019 02:39 PM, Jack Margolis wrote:
Adam.

I like perfboards but have never seen one like the one you used to build your DSB FTB rig.
Any clue on how to find one like that?

D4D IMD

 

Just got my D4D and thought I read a post about an IMD mod for improvement. Has anyone done the mod and if so did it improve? and what steps did you take? Just wanted to figure in do it during build or not at all.

73

 David

   N8DAH

 

Re: D4D IMD

Adam Rong
 

David,

The mod is highly recommended. Mod it while you build it. The impacted parts are C5, C6 and R13.

Thanks,
Adam

在 2019年5月29日,上午9:52,N8DAH <Dherron@...> 写道:

Just got my D4D and thought I read a post about an IMD mod for improvement. Has anyone done the mod and if so did it improve? and what steps did you take? Just wanted to figure in do it during build or not at all.

73

 David

   N8DAH

 

Re: D4D IMD

 

Adam,

 Thanks for the fast reply building it now, just found my last two .01/103 caps so need to order more!

73

 David

Re: The perfboards

Adam Rong
 

Rob,

I don’t get it. It is not hidden layer. It is just covered by solder mask. The interconnection is shown on the silkscreen printing on the top over layer.

Thanks,
Adam

在 2019年5月29日,上午8:48,Rob via Groups.Io <roomberg@...> 写道:

Welllllll  ....yes... its official.... I am not qualified to operate this appliance.

<choccombo.jpg>

I had some Choc Perf Board here that I thought would be good for experimenting with
rotary encoders.

Seemed simple enough.
I had snapped them apart and was playing with just one  of them
and I saw what looked to me like 8 completely isolated pads ....what you see here in the GREEN circle.

Boy was I wrong.
I had soldered a 3 lead rotary encoder into the purple marked pads and added 3 yellow wires to play with GROUND and A and B in the
rotary encoder example sketches.
This failed to get the desired results and kicked this for 2 weeks.... using various encoders......
and then yesterday I used an ohmmeter to figure where I might be shorting out my soldering.
And then found there is a sandwiched layer where the RED and BLUE are.

I don't get it.......
why the hidden layer?
Why not have the traces all connected on the solder side of the board where you can see it?

73 Rob KB3BYT



On 05/28/2019 02:39 PM, Jack Margolis wrote:
Adam.

I like perfboards but have never seen one like the one you used to build your DSB FTB rig.
Any clue on how to find one like that?

Re: The perfboards

Rob <roomberg@...>
 

It fooled me.

But then again... I have a vision problem. A really bad vision problem.

So I examine everything with 7 diopter glasses.

I looked at the CHOC board and saw GREEN in between SILVER  squares.

Never for a moment considering that rows of silver were shorted together.




so
I ask the question WHY?
Why not have ALL those pads be visibly connected like in this image I edited to show it:



I definitely agree that is a good design to have the multiple rows of perimeter
and the internal groupings.

I have done almost the same exact thing with my proto PCB I kitchen etched.


 

I often have extra proto pads I add to PCBs in  groups of three.
Looks like an alien army.






On 05/28/2019 11:05 PM, Adam Rong wrote:
Rob,

I don’t get it. It is not hidden layer. It is just covered by solder mask. The interconnection is shown on the silkscreen printing on the top over layer.

Thanks,
Adam

在 2019年5月29日,上午8:48,Rob via Groups.Io <roomberg@...> 写道:

Welllllll  ....yes... its official.... I am not qualified to operate this appliance.



I had some Choc Perf Board here that I thought would be good for experimenting with
rotary encoders.

Seemed simple enough.
I had snapped them apart and was playing with just one  of them
and I saw what looked to me like 8 completely isolated pads ....what you see here in the GREEN circle.

Boy was I wrong.
I had soldered a 3 lead rotary encoder into the purple marked pads and added 3 yellow wires to play with GROUND and A and B in the
rotary encoder example sketches.
This failed to get the desired results and kicked this for 2 weeks.... using various encoders......
and then yesterday I used an ohmmeter to figure where I might be shorting out my soldering.
And then found there is a sandwiched layer where the RED and BLUE are.

I don't get it.......
why the hidden layer?
Why not have the traces all connected on the solder side of the board where you can see it?

73 Rob KB3BYT



On 05/28/2019 02:39 PM, Jack Margolis wrote:
Adam.

I like perfboards but have never seen one like the one you used to build your DSB FTB rig.
Any clue on how to find one like that?