Date   
Re: Sound card powerful enough to key D4D VOX?

Trent Trent
 

I've got $1 ebay USB sound cards and they work fine for the VOX,the only problem I have is the radio is deaf and wont go on freq no matter what but atleast the VOX works


On Sun, 28 Jul 2019 at 08:09, Mark Sykes <marksykeskd8rg@...> wrote:
Adam,

Thanks for the info, I ordered the $10 unit. 

Mark

On Sat, Jul 27, 2019 at 5:57 PM Adam Rong <rongxh@...> wrote:
Mark,

The newer generation built-in sound card has to meet an European hearing protection standard EN50332 and the max output voltage will not exceed 150mV on a 32 ohm load. This is the reason why they cannot drive D4D as the VOX circuit requires 600mV. However, we can easily find other USB sound cards, such as the $25 Creative SoundBlaster Play3! and the $10 one I am offering at http://crkits.com in D4D Frequencies and Options drop down menu. The background noise and interference pickup are both very important, and these two are qualified for FT8 operation per our test.

Before you make a purchase, please make sure you have pushed both Pwr and system volume to max. Also, make sure you are controlling the correct sound card. If you find your sound card cannot drive VOX at all or cannot drive constantly, you can consider the sound card purchase.

Thanks,
Adam

D4D: Part List Updated with IMD mod and more options

Adam Rong
 

Folks,

See this:
https://groups.io/g/crkits/files/D4D%20Kit%20Documentations/d4dpartlist20190728forMP_80_40_30_20.xls

The changes are marked in blue. The IMD mod becomes easier if you just replace C5 by a 105 monolithic which will be supplied in the latest version kit. You don't have to do more complicated modification as shown in modification 1 in the full manual. Also, I have added both Mini Wire Antenna Kit and 6-60m 100W dipole as the standard options.

Thanks,
Adam

Re: Sound card powerful enough to key D4D VOX?

Mark Sykes
 

Adam,

Thanks for the info, I ordered the $10 unit. 

Mark


On Sat, Jul 27, 2019 at 5:57 PM Adam Rong <rongxh@...> wrote:
Mark,

The newer generation built-in sound card has to meet an European hearing protection standard EN50332 and the max output voltage will not exceed 150mV on a 32 ohm load. This is the reason why they cannot drive D4D as the VOX circuit requires 600mV. However, we can easily find other USB sound cards, such as the $25 Creative SoundBlaster Play3! and the $10 one I am offering at http://crkits.com in D4D Frequencies and Options drop down menu. The background noise and interference pickup are both very important, and these two are qualified for FT8 operation per our test.

Before you make a purchase, please make sure you have pushed both Pwr and system volume to max. Also, make sure you are controlling the correct sound card. If you find your sound card cannot drive VOX at all or cannot drive constantly, you can consider the sound card purchase.

Thanks,
Adam

Re: Sound card powerful enough to key D4D VOX?

Adam Rong
 

Mark,

The newer generation built-in sound card has to meet an European hearing protection standard EN50332 and the max output voltage will not exceed 150mV on a 32 ohm load. This is the reason why they cannot drive D4D as the VOX circuit requires 600mV. However, we can easily find other USB sound cards, such as the $25 Creative SoundBlaster Play3! and the $10 one I am offering at http://crkits.com in D4D Frequencies and Options drop down menu. The background noise and interference pickup are both very important, and these two are qualified for FT8 operation per our test.

Before you make a purchase, please make sure you have pushed both Pwr and system volume to max. Also, make sure you are controlling the correct sound card. If you find your sound card cannot drive VOX at all or cannot drive constantly, you can consider the sound card purchase.

Thanks,
Adam

Re: Raspberry pi setup for d4d

willie b
 

waiting for my d4d kit... i have just received two new RPi4s (2GB and 4GB); they seem 'faster' running many applications... i'm hoping that the additional memory and faster CPU may help with some digital apps... i'll give ft8 a shot (may overclock?)

currently running W7QT's nice panadapter python scripts on an RPI3 w/a Xiegu X5105 (which has an IF port!)...also, gqrx works FB as well on the RPi3, but is 'in progress' on the RPi4 due to USB initialization/handling:

RPi Panadapter

72,
bill, kg4zqz

Sound card powerful enough to key D4D VOX?

Mark Sykes
 

I've tried several sound cards including an external USB unit.  None are powerful enough (volume up all the way, 1500 Hz signal playing) to trigger the D4D VOX.  What type are others using?
Thanks,
Mark
KD8RG

Re: Photos of Mini Wire Antenna Sample Build

Adam Rong
 

And I just updated the Mini Wire Antenna manual to Draft 2 version.

Thanks,
Adam

Re: Short Video about QRO Mini Wire Antenna

Adam Rong
 

5W is fine for FT8.

On Sat, Jul 27, 2019 at 11:04 PM Simon C via Groups.Io <symen79=yahoo.com@groups.io> wrote:
Adam,

how many watts ats is the smaller toroid good for? I would assume 5w.

thanks

simon



--
Thanks,
Adam Rong

Re: Short Video about QRO Mini Wire Antenna

Simon C <symen79@...>
 
Edited

Adam,

how many watts is the smaller toroid good for? I would assume 5w.

thanks

simon

Re: Photos of Mini Wire Antenna Sample Build

Adam Rong
 

Fred,

Sorry for the delay. Please refer to this diagram.
https://groups.io/g/crkits/photo/90325/0?p=Created,,,20,2,0,0

Thanks,
Adam

Short Video about QRO Mini Wire Antenna

Adam Rong
 

Folks,

See this short video:
https://mp.weixin.qq.com/s/OWX5vwlfm-IhmoxwD6QK5A

It is now more capable for mobile operations. I can take email order now for 16 USD each, plus 5 USD shipping.

Thanks,
Adam

Re: Raspberry pi setup for d4d

Clint Sharp <cjaysharp@...>
 

Jeez, alright fella. It didn't work for you. Chill out. 


On Fri, 26 Jul 2019, 01:23 Trent Trent, <vk7hrs@...> wrote:
I can tell ya now that a pi3 wont fuckin work for ft8,i had it on my ft897 and it was way too slow decoding and that was using it as a desktop computer and nothing else runnin

On Fri, 26 Jul 2019 at 00:25, Ron Stone <rsstone2@...> wrote:
Simon,

As others have indicated, the Zero will work best when responding to others, and may not complete the decode quickly enough when you're calling CQ.  However, can anyone confirm that the Zero is fast enough even when just responding to someone else's CQ or tail ending - that is, before the next transmission cycle begins?

73,

Ron (KA3J)

Re: Raspberry pi setup for d4d

Simon C <symen79@...>
 
Edited

I will try it when the d4d arrives and post my findings. I have a spare 3b+ as well in case the zero does not work out :)

I think trent needs a chill pill, take it easy there fella.

Re: Raspberry pi setup for d4d

Trent Trent
 

I can tell ya now that a pi3 wont fuckin work for ft8,i had it on my ft897 and it was way too slow decoding and that was using it as a desktop computer and nothing else runnin


On Fri, 26 Jul 2019 at 00:25, Ron Stone <rsstone2@...> wrote:
Simon,

As others have indicated, the Zero will work best when responding to others, and may not complete the decode quickly enough when you're calling CQ.  However, can anyone confirm that the Zero is fast enough even when just responding to someone else's CQ or tail ending - that is, before the next transmission cycle begins?

73,

Ron (KA3J)

Re: Photos of Mini Wire Antenna Sample Build

fj.tragauer@...
 

Hi Adam,
Thanks I have received the Mini Antenna Kit. Please send more instructions how to build like in second photo for 1:1 BALUN for a Dipole for the 40m band. How many windings for each wire. What is the exact meaning  A - L, A' and B - G, B' and C - R, C' - B from the manual.

Best regards,
Fred

Re: Raspberry pi setup for d4d

Ron Stone
 

Simon,

As others have indicated, the Zero will work best when responding to others, and may not complete the decode quickly enough when you're calling CQ.  However, can anyone confirm that the Zero is fast enough even when just responding to someone else's CQ or tail ending - that is, before the next transmission cycle begins?

73,

Ron (KA3J)

Re: Preliminary Specifications of 6-60m 100W Coil Dipole Antenna

Adam Rong
 

Robert,

You can order now from the drop down menu of D4D order and choose 6-60m Coil Dipole Antenna.

Thanks,
Adam

On Thu, Jul 25, 2019 at 10:09 PM Robert KF6FOD <rgp415@...> wrote:
Where and when can I order this antenna ?



--
Thanks,
Adam Rong

Re: Preliminary Specifications of 6-60m 100W Coil Dipole Antenna

Robert KF6FOD
 

Where and when can I order this antenna ?

Re: Preliminary Specifications of 6-60m 100W Coil Dipole Antenna

Adam Rong
 

My bad. The antenna looks like this.
O1CN01L9VAxU1q5r7JPBQ6A_!!24145445.jpg

Thanks,
Adam

On Thu, Jul 25, 2019 at 7:47 AM Trent Trent <vk7hrs@...> wrote:
Is the antenna a linked dipole or just a cut for single band?



--
Thanks,
Adam Rong

Re: Raspberry pi setup for d4d

Juha Lindfors
 

Checked. Fast, both wideband decoding and narrow filter. Decoder sensitivity seems to be minimum.

Juha, Oh8cw

to 25. heinäkuuta 2019 klo 11.11 Juha Lindfors via Groups.Io <lindfors.juha=gmail.com@groups.io> kirjoitti:

This happens on 20 when the band is very crowded and calling cq. Replying to others is ok.

Juha, Oh8cw

to 25. heinäkuuta 2019 klo 11.04 Adam Rong <rongxh@...> kirjoitti:
Change decode from deep to normal and try again.

在 2019年7月25日,下午3:43,Juha Lindfors <lindfors.juha@...> 写道:

It runs Ft8, but if there are a lot of stations - a lot to decode then it has no time to get an answer before the next cycle begins. Otherwise it runs ok. 

Juha, oh8cw



to 25. heinäkuuta 2019 klo 9.46 Clint Sharp <cjaysharp@...> kirjoitti:
News to me Trent, I've run it successfully on a Pi3 and there are plenty of YouTube videos showing others doing the same.

On Thu, 25 Jul 2019, 00:38 Trent Trent, <vk7hrs@...> wrote:
Even a rpi 3 cant do FT8

On Thu, 25 Jul 2019 at 09:25, Ron Stone <rsstone2@...> wrote:
Simon,

Have you run WSJT-X on a Pi Zero before?  I understand it may not be sufficient for FT8.   I'm thinking of running it on a PI 3 A+ for portable work.

73,

Ron (KA3J)