Date   

Re: D4D: 2nd shipment

F6GWE
 

Hi group

Few days ago D4D was at home!

This evening first receive! It works well, levels about 60 dB with a magnetic loop on 40 m
Sunday Will beTX day!
Thanks Adam for this toy!
73
Patrick
F6GWE


Re: D4D Audio very low

Jim
 

Thanks for clarifying Adam.


Re: D4D Audio very low

Adam Rong
 

Guys,

30dB is recommended. It is not low.

Thanks,
Adam

在 2019年6月7日,上午12:14,Jim <KH2SR@...> 写道:

I also have low audio at around 30-40db with the pre-built 40m you sent me. But it seems to work ok...

73

Jim - KH2SR 


Re: D4D Audio very low

Jim
 

I also have low audio at around 30-40db with the pre-built 40m you sent me. But it seems to work ok...

73

Jim - KH2SR 


Re: D4D Audio very low

Adam Rong
 

David,

Please don’t add amplifier as the output spectrum is not clear due to inter-modulation, so it is a good idea to stay at 1-watt.

Thanks,
Adam

在 2019年6月6日,上午9:08,N8DAH <Dherron@...> 写道:

Adam,

 It is decoding, have checked parts. It does work and I am very happy with it for sure! Just wanted to see if I could help the audio out a hint more.

I made a FT8 700+mile  qso today on a indoor magloop and about 11w using the D4D on a WA2EBY amp.

73

 David



Re: D4D Audio very low

N8DAH <Dherron@...>
 

Adam,

 It is decoding, have checked parts. It does work and I am very happy with it for sure! Just wanted to see if I could help the audio out a hint more.

I made a FT8 700+mile  qso today on a indoor magloop and about 11w using the D4D on a WA2EBY amp.

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



Re: D4D Audio very low

N8DAH <Dherron@...>
 

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,

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



D4D Audio very low

N8DAH <Dherron@...>
 

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: Poor boys DSB FT8

Jim
 

 Did you take any pictures of it at FDIM?


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


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: 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: 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: 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


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

 


Camping with D4D

Adam Rong
 

Folks,

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

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


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

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