Re: What is CPK-3?

#4592

a more modern version of TA/CD2003 am/fm radio IC. For SSB RX, SI4732/SI4735 is a much better option imho.
--
73

Barb WB2CBA

Re: What is CPK-3?

#4591

It is a direct conversion receiver, Jim, so the short answer is, no. You could inject a signal close to it's dial frequency into the AM RF input, but you'd have to chase yourself up and down the bands. The architecture is actually quite similar to the (tr)USDX, with a CPU doing a lot of the heavy lifting. A very powerful chip, indeed!
John, VK4TJ

Re: What is CPK-3?

#4590

Yep, that is the one!
Many thanks
John, VK4Tj

Re: What is CPK-3?

#4589

John,

I think this is it. Working on my phone so please verify.

Regards,
Nathan

Sent from Proton Mail mobile

Show quoted text

-------- Original Message --------
On Nov 25, 2023, 21:50, John Kirk via groups.io < vk4tj@...> wrote:

Have you got a link to an English language data sheet on the chip, Adam? My usual sources are coming up dry....
Thanks
John

KT0936m_b9_v2.2-english.pdf

Re: What is CPK-3?

#4588

Have you got a link to an English language data sheet on the chip, Adam? My usual sources are coming up dry....
Thanks
John

Re: What is CPK-3?

#4587

Could be a great kid kit.. ? does it do SSB?

Steve

Pardon the brevity, sent from a mobile device. So there.

Show quoted text

On Sat, Nov 25, 2023 at 7:23?AM Adam Rong <rongxh@...> wrote:

Guys,

It is a FM/MW/SW radio receiver based on the KT-0936M(B9) radio-on-chip. Stay tuned as I am about to receive the PCB tomorrow.

And it is the prototype I built on my Choc board. I'd say the performance is very impressive.

Thanks,

Adam

Re: What is CPK-3?

#4586

开云体育

I haven't tried myself. I suppose it is not easy as the IF is not exposed to us.

On 2023/11/25 23:37, Jim Burns wrote:

Show quoted text

Hey Adam,
Cool !? I'll take a couple.? Can a BFO be added for CW/SSB?

Jim WB4ILP?

On Sat, Nov 25, 2023, 10:23 AM Adam Rong <rongxh@...> wrote:

Guys,

It is a FM/MW/SW radio receiver based on the KT-0936M(B9) radio-on-chip. Stay tuned as I am about to receive the PCB tomorrow.

And it is the prototype I built on my Choc board. I'd say the performance is very impressive.

Thanks,

Adam

Re: What is CPK-3?

#4585

Hey Adam,

Cool !? I'll take a couple.? Can a BFO be added for CW/SSB?

Jim WB4ILP?

Show quoted text

On Sat, Nov 25, 2023, 10:23 AM Adam Rong <rongxh@...> wrote:

Guys,

It is a FM/MW/SW radio receiver based on the KT-0936M(B9) radio-on-chip. Stay tuned as I am about to receive the PCB tomorrow.

And it is the prototype I built on my Choc board. I'd say the performance is very impressive.

Thanks,

Adam

htpkXHPrwpstUunb.jpg

DuiJpQ60o9dGuKs2.png

Re: What is CPK-3?

#4584

Adam,
? Looks nice. Hopefully they will be available?
for us so we can send you our money.?

JP
KA3BWP

What is CPK-3?

#4583

开云体育

Guys,

It is a FM/MW/SW radio receiver based on the KT-0936M(B9) radio-on-chip. Stay tuned as I am about to receive the PCB tomorrow.

And it is the prototype I built on my Choc board. I'd say the performance is very impressive.

Thanks,

Adam

Re: ADX-S+ESP32(Bluetooth Audio)

#4582

Dear Mahesh,
Thanks for the test. ?I have tested on FT8CN and it worked.
73 Hitoshi, JE1RAV

Re: ADX-S+ESP32(Bluetooth Audio)

#4581

Hi Hitoshi,

Thanks for sharing your work. I have successfully?tested FT8.reception with my homebrew FT8 TRX. I fed audio to ESP32 and wsjtx decoded signals using BT/HFP on W10, but the Pi-4 failed to detect it as HFP. I installed ESP-IDF and Btstack on Pi-4, after which I compiled and uploaded code to ESP32. I Need to modify the code to suit my mono band FT8 TRX based on nano. Attaching a few screenshots for?reference. I am yet to test it on FT8CN.

Thanks & 73

mahesh-vu2iia

INDIA

Show quoted text

On Fri, Oct 27, 2023 at 7:16?AM <h.kawaji@...> wrote:

I modified the ADX-S and replaced the Arduino Nano with an ESP32 Devkit.
The ESP32's bluetooth audio (headset profile) allows wireless connection to a PC.
For more information, please visit?

I am very sorry, but the document is written in Japanese.

Please use a language translation tool like "DeepL" to read it.

Hitoshi, JE1RAV

Re: PIXIE2023: One of the cleanest output Pixie?

#4580

开云体育

You can try adding 120pF or 100pF cap in parallel to 1uH inductor in the LPF. The performance is not promised as it also relates to the bias but it should improve.

Thanks,

Adam

Show quoted text

在 2023年11月14日，07:18，Jim Burns <outbackerwb4ilp@...> 写道：

?
Hey Adam,
Congrats !? That's quite a bit better !
Great design but I haven't had time to build mine.??
Jim

On Mon, Nov 13, 2023, 8:13 AM Adam Rong <rongxh@...> wrote:

Jim,

In short, regular Chinese Pixie -20dBc, my Pixie2023 -46dBc per test result.

Thanks,

Adam

On 2023/11/13 16:14, Jim Burns wrote:

Hi Adam,
The link doesn't work for me.

Jim WB4ILP?

On Fri, Nov 10, 2023, 8:14 PM Adam Rong <rongxh@...> wrote:

Guys,

See my recent post about spurious test result about different Pixie designs.

Thanks,

Adam

Re: PIXIE2023: One of the cleanest output Pixie?

#4579

Hey Adam,

Congrats !? That's quite a bit better !

Great design but I haven't had time to build mine.??

Jim

Show quoted text

On Mon, Nov 13, 2023, 8:13 AM Adam Rong <rongxh@...> wrote:

Jim,

In short, regular Chinese Pixie -20dBc, my Pixie2023 -46dBc per test result.

Thanks,

Adam

On 2023/11/13 16:14, Jim Burns wrote:

Hi Adam,
The link doesn't work for me.

Jim WB4ILP?

On Fri, Nov 10, 2023, 8:14 PM Adam Rong <rongxh@...> wrote:

Guys,

See my recent post about spurious test result about different Pixie designs.

Thanks,

Adam

Re: PIXIE2023: One of the cleanest output Pixie?

#4578

Thanks Adam!

I understand that the modification consists in adding a capacitor.
What is the value and position?

73!
Costin, YO8RCD

?n lun., 13 nov. 2023 la 15:13, Adam Rong <rongxh@...> a scris:

Show quoted text

Jim,

In short, regular Chinese Pixie -20dBc, my Pixie2023 -46dBc per test result.

Thanks,

Adam

On 2023/11/13 16:14, Jim Burns wrote:

Hi Adam,
The link doesn't work for me.

Jim WB4ILP?

On Fri, Nov 10, 2023, 8:14 PM Adam Rong <rongxh@...> wrote:

Guys,

See my recent post about spurious test result about different Pixie designs.

Thanks,

Adam

Re: PIXIE2023: One of the cleanest output Pixie?

#4577

开云体育

Jim,

In short, regular Chinese Pixie -20dBc, my Pixie2023 -46dBc per test result.

Thanks,

Adam

On 2023/11/13 16:14, Jim Burns wrote:

Show quoted text

Hi Adam,
The link doesn't work for me.

Jim WB4ILP?

On Fri, Nov 10, 2023, 8:14 PM Adam Rong <rongxh@...> wrote:

Guys,

See my recent post about spurious test result about different Pixie designs.

Thanks,

Adam

Re: PIXIE2023: One of the cleanest output Pixie?

#4576

Hi Adam,

The link doesn't work for me.

Jim WB4ILP?

Show quoted text

On Fri, Nov 10, 2023, 8:14 PM Adam Rong <rongxh@...> wrote:

Guys,

See my recent post about spurious test result about different Pixie designs.

Thanks,

Adam

PIXIE2023: One of the cleanest output Pixie?

#4575

Guys,

See my recent post about spurious test result about different Pixie designs.

Thanks,

Adam

Re: [email protected] Digest #396

#4574

> I would agree - John build it!
> (its got to be more reliable than a QDX! lol)

WHY?

73 Hans G0UPL

Show quoted text

On Fri, Nov 10, 2023 at 6:01?AM [email protected] <[email protected]> wrote:

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Re: What to do with my early 2019 unopened D4D DSB kit?
From: ve3ega
Date: Fri, 10 Nov 2023 02:07:09 +03

Adam,

I would agree - John build it!
(its got to be more reliable than a QDX! lol)

73

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Re: What to do with my early 2019 unopened D4D DSB kit?

ve3ega

#4573

Adam,

I would agree - John build it!
(its got to be more reliable than a QDX! lol)

73