Date   
Re: The perfboards

Adam Rong
 

Rob,

Good job on your alien army.

The solder mask is used to limit the area of the solder on the pad. I have to admit that the first time users normally will encounter problems but later on they will love it more and more.

Thanks,
Adam

D4D: A Few Assembled Kits

Adam Rong
 

Folks,

I have some assembled kits ready. These kits were built and tested by myself. If you need them, please contact me offline.

Thanks,
Adam

Re: D4D: 80m 3.573MHz orderable

Adam Rong
 

Folks,

A brief test to use it as an 80m ARDF transmitter seems promising. Only one hint: Don't set the audio pitch of the audio source too high, because it will increase the bandwidth of IMD.

Thanks,
Adam

Re: Poor boys DSB FT8

Adam Rong
 

Still watching:
https://qrpguys.com/digital-transceiver

Thanks,
Adam

Re: Poor boys DSB FT8

W8NSI James
 

I tried that link and it says "Password Protected" on the page!

73 de w8nsi Jim




From: crkits@groups.io <crkits@groups.io> on behalf of Adam Rong <rongxh@...>
Sent: Friday, May 31, 2019 19:13
To: crkits@groups.io
Subject: Re: [crkits] Poor boys DSB FT8
 
Still watching:
https://qrpguys.com/digital-transceiver

Thanks,
Adam

Re: D4D: First Shipment

Charlie Vest
 

Group ,


My 40 meter kit arrived in Northeast Oklahoma in the mail today . I will look at the latest updates from Adam and try to get it up and running today or tomorrow .

This might help Adam get an idea how long it takes for the very center of the USA .


I also have a 30 meter one ordered that shipped with his last shipment .


I think rather quick service compared to many other packages I have ordered from China .

Best 73 ,

Charlie , W5COV

On May 21, 2019 at 12:08 PM Adam Rong <rongxh@...> wrote:

Folks,

I have updated PayPal with all the tracking numbers. Orders on May 18 and later will be shipped next Monday. I shipped by post office with tracking, so you can track it on your local post office web site in a few days. For instance, US guys can track on USPS tracking site at 

You can also track on EMS web site in China here:

Normally it will take 10-20 days, so give it some patience and you will get it anyway.

Thanks,
Adam


On Tue, May 21, 2019 at 9:19 AM Adam Rong via Groups.Io <rongxh= gmail.com@groups.io> wrote:
Folks,

I just shipped three boxes yesterday to my shipping agent and today they will ship to worldwide. The backlog is not cleared so I will ship some more next Monday. After shipping, I will update tracking number in PayPal.

The full manual preview draft is already in the files section. I will take time to improve it this week. You will see a brand new version when you get the kit.

Thanks,
Adam




--
Thanks,
Adam Rong

Re: D4D: First Shipment

Adam Rong
 

Charlie,

Thanks for the information. Normally it takes 7 days to arrive US West Coast and 14 days to arrive East Coast, so it is within normal range. I am looking forward to your success of building and operating. Also, you are welcome to write review for D4D at:
https://www.eham.net/reviews/addreview/14267

BTW, I cannot access my Gmail mailbox from yesterday. I will figure out a way soon. Meanwhile, you can send email to this group if it is not that private. If you place order, you can directly send payment to PayPal rongxh@... and leave message. I will process accordingly.

The 3rd shipment will be shipped 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: d4dqgrevb.pdf

Uploaded By: Adam Rong

Description:
D4D Quick Guide Rev B - June 2, 2019.

You can access this file at the URL:
https://groups.io/g/crkits/files/D4D%20Kit%20Documentations/d4dqgrevb.pdf

Cheers,
The Groups.io Team

Camping with D4D

Adam Rong
 

Folks,

Camping and operating with D4D. Lots of fun. The 20m version works great. 

Thanks,
Adam

Re: Camping with D4D

Charlie Vest
 

Beautiful place to be.

Are you using an EFHW antenna ? How did you do ? 20 is pretty good in USA today .

Charlie , W5COV

On June 2, 2019 at 8:11 PM Adam Rong <rongxh@...> wrote:

Folks,

Camping and operating with D4D. Lots of fun. The 20m version works great. 

Thanks,
Adam

 

Re: Camping with D4D

Adam Rong
 

Charlie,

Yes, it is a home brew EFHW. The toroid is FT50-43. I wind 3 turns primary, 21 turns secondary. 100p 100V is added. The cost is very low.

Thanks,
Adam

D4D: Third Shipment

Adam Rong
 

Folks,

I have just updated tracking numbers for the 3rd shipment. I have cleared all the backlog now.

I have received several messages reporting the receipt of my previous shipments. Please check the parts based on the part list and if you find missing parts, please let me know, so I can arrange shipment next Monday.

The introductory price will end by the end of this month. Starting from July 1, 2019, the shipping fee will be added.

Thanks,
Adam

Re: Poor boys DSB FT8

DuWayne Schmidlkofer <duwayne@...>
 

They had a couple sample units at FDIM in Dayton. When I talked to them, they told me it was in final stages of testing. I think they will not bring the link live when they release the product.
DuWayne KV4QB

On 5/20/2019 11:39 AM, Adam Rong wrote:
Folks,
Anyone has access to this page?
https://qrpguys.com/poor-boys-40-30-20-1-10w-dsb-ft8-transceiver
It seems new but I am curious about the design concept.
Thanks,
Adam

D4D: 20m PSK?

Adam Rong
 

Folks,


Any idea?  Give it a try to mod D4D 20m FT8 to 20m PSK at 14070?
C3: 15p -> 39p
C2: 27p -> 82p

Thanks,
Adam

Re: D4D: 20m PSK?

Adam Rong
 

On Wed, Jun 5, 2019 at 12:06 AM Adam Rong via Groups.Io <rongxh=gmail.com@groups.io> wrote:
Folks,


Any idea?  Give it a try to mod D4D 20m FT8 to 20m PSK at 14070?
C3: 15p -> 39p
C2: 27p -> 82p

Thanks,
Adam



--
Thanks,
Adam Rong

Re: Poor boys DSB FT8

Jim
 

 Did you take any pictures of it at FDIM?

D4D Audio very low

 

RX audio is very low even with mic line at 100% any one else have this? I did swap out the 3904 for another and it did help a little.

73

 David

 N8DAH

Re: D4D Audio very low

Adam Rong
 

David,

What is your sound card? What is the reading of your audio input in dB? Is it over 30dB?

Thanks,
Adam

在 2019年6月6日,上午8:22,N8DAH <Dherron@...> 写道:

RX audio is very low even with mic line at 100% any one else have this? I did swap out the 3904 for another and it did help a little.

73

 David

 N8DAH


Re: D4D Audio very low

 

I have used 3 different cards from a StarTech to a SoundBlaster SBX and a cheap no name usb. All at 100% mic level its hard to get 30-40db.

73

 David

Re: D4D Audio very low

Adam Rong
 

David,

It is not normal. I have used several sound cards and they are normally above 40dB, sometimes over 50dB.  This is my Sound Blaster Play !3.
  1. Can you make sure that you have chosen the correct sound card in software? It is in Setting - Audio.
  2. Can you double check if you have installed the parts properly? If yes, try to bypass the crystal in the front end by a 103 or 104 cap to see if the audio increases. 
  3. Also, if you can decode something, you don’t have to worry too much.

Thanks,
Adam

在 2019年6月6日,上午8:36,N8DAH <Dherron@...> 写道:

I have used 3 different cards from a StarTech to a SoundBlaster SBX and a cheap no name usb. All at 100% mic level its hard to get 30-40db.

73

 David