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13TR: 6 kits left before EOL

 

开云体育

Guys,

I have decided to reduce SKU to focus on key kit products. I have 6 13TR kits (1 is ready, 5 to prepare) left before EOL. You will enjoy the classic circuit based on the design of VK3YE's Knobless Wonder. Also, CPK-2 (DC receiver based on NE602 and LM386) will be EOL soon as well.


?

Thanks,

Adam
Re: How to measure output CPK-4

 

Put a 50ohm dummy load and measure the voltage across it while transmitting , then use the formula for power using? the 50 ohms and the measured voltage ( P= V^2/R)

73
W4NRI - Noel

On Thu, Nov 21, 2024, 4:46 PM anton.rietveld via <anton.rietveld=[email protected]> wrote:
I build the CPK-4. It works very good! Not too chirpy. While adjusting the frequency I blew the 100uH inductor. Today I received some spares and fixed the transmitter.
Does anyone know how to measure the output power with a multimeter?
CPK4

 

I have made several contacts with my 20 m cpk-4 transmitter. I will spend more time and plan to make some great contacts.

9 volts and dipole?

Wayne F. Steury, N9EGT ?western Colorado?

IMG_9886.jpeg
IMG_9885.jpeg

Re: How to measure output CPK-4

 

Hi Adam,
?
Great! 0,4W and 955km range ?
?
73,
Anton
?
Re: How to measure output CPK-4

 

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Hi Anton,

0.4 watt is very normal if you power with 9V.

Thanks,
Adam

在 2024年11月23日，03:49，anton.rietveld via groups.io <anton.rietveld@...> 写道：

?

[Edited Message Follows]

Hi Berrie,
?
When I looked at that diagram, I suddenly realized that you can measure on a dummy load. And as it happens, this exact function is described for the dummy load from QRP Labs that I have sitting in the drawer.
?
?
I measured 6,6V, so the output power would be around 0,4W
Bye and 73,
Anton
Re: How to measure output CPK-4

 
Edited

Hi Berrie,
?
When I looked at that diagram, I suddenly realized that you can measure on a dummy load. And as it happens, this exact function is described for the dummy load from QRP Labs that I have sitting in the drawer.
?
?
I measured 6,6V, so the output power would be around 0,4W
Bye and 73,
Anton
Re: How to measure output CPK-4

 

Hi Anton,

There is a good description of building a QRP power meter by Vk3ye on the internet, if you search for "Vk3ye qrp power meter".

I measured it attaching an oscilloscope to the dummyload for the transmitter. The multimeter was used to measure the transmitters power supply :-)

With only a multimeter you cannot measure the transmitters power output, unless you are going to be smart depending on the details of your meter.?

You could attach a dummyload to the transmitter, and build a diode detector to measure the peak voltage of your transmitter. Than use your meter to measure this, and do the math to convert it to output power.?

If you are really interested in measuring this, I would recommend to use this as an excuse to get myself an oscilloscope of some sort that covers your cpk's frequency :-)?

If you are in the Eindhoven area I could help. In that case please send me a direct message.

Berrie PB4PT.?


Op do 21 nov. 2024 22:46 schreef anton.rietveld via <anton.rietveld=[email protected]>:
I build the CPK-4. It works very good! Not too chirpy. While adjusting the frequency I blew the 100uH inductor. Today I received some spares and fixed the transmitter.
Does anyone know how to measure the output power with a multimeter?
How to measure output CPK-4

 

I build the CPK-4. It works very good! Not too chirpy. While adjusting the frequency I blew the 100uH inductor. Today I received some spares and fixed the transmitter.
Does anyone know how to measure the output power with a multimeter?
Re: CPK-4 appears on Oct issue of QQ

 

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Hi Matt,

Thanks for sharing. Hope you enjoy the kit.

Thanks,
Adam

在 2024年11月13日，16:39，mweidle@... via groups.io <mweidle@...> 写道：

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I was able to have some QSOs on 40m and 30m. Rx was a Kiwi rx, 20km away from my qth. Stations, about 600km away from DL and Italy. ?IMG_20241102_195007.jpgIMG_20241102_201541.jpgIMG_20241102_201552.jpgIMG_20241103_130333.jpg
Re: CPK-4 appears on Oct issue of QQ

 
Edited

Unfortunately I will get QQ first time next January. So I can't read your report, Adam.?
Re: CPK-4 appears on Oct issue of QQ

 

I was able to have some QSOs on 40m and 30m. Rx was a Kiwi rx, 20km away from my qth. Stations, about 600km away from DL and Italy. ?
Re: SSB6.1 kit info

 

Hello friends!

I finished it myself. The plate is functional but needs to be adjusted.
I have the necessary devices, I just lack the time...
If someone still has them under construction, maybe we can finish them together.

GL & 73!

Costin,

?n lun., 4 nov. 2024 la 19:00, Mark - N7EKU via <n7eku=[email protected]> a scris:

Hi Adam,
?
Did you ever finish the assembly of this?? How did it turn out?
?
Cheers and 73,
?
?
Mark
Re: SSB6.1 kit info

 

Hi Adam,
?
Did you ever finish the assembly of this?? How did it turn out?
?
Cheers and 73,
?
?
Mark
Re: CPK-4 appears on Oct issue of QQ

 

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Gary,


Thanks for your support. I haven't seen my published article yet. I am not a subscriber to QQ.


Thanks,

Adam


在 2024/10/25 3:35, Gary Freeman via groups.io 写道:

Adam

Thanks for your article,? It helped to clarify a few things I wasn't clear on.

I appreciate all your great radios.

72 de Gary W0ITT




Sent from
From: [email protected] <[email protected]> on behalf of Adam Rong <rongxh@...>
Sent: Wednesday, October 23, 2024 10:36 PM
To: [email protected] <[email protected]>
Subject: [CRKits] CPK-4 appears on Oct issue of QQ
?
Guys,

If you still read QRP Quarterly, you will find my short piece about CPK-4 QRP Transmitter Kit.


Thanks,
Adam
Re: CPK-4 appears on Oct issue of QQ

 

开云体育

Adam

Thanks for your article,? It helped to clarify a few things I wasn't clear on.

I appreciate all your great radios.

72 de Gary W0ITT




Sent from

From: [email protected] <[email protected]> on behalf of Adam Rong <rongxh@...>
Sent: Wednesday, October 23, 2024 10:36 PM
To: [email protected] <[email protected]>
Subject: [CRKits] CPK-4 appears on Oct issue of QQ
?
Guys,

If you still read QRP Quarterly, you will find my short piece about CPK-4 QRP Transmitter Kit.


Thanks,
Adam
CPK-4 appears on Oct issue of QQ

 

Guys,

If you still read QRP Quarterly, you will find my short piece about CPK-4 QRP Transmitter Kit.


Thanks,
Adam

image0.jpeg

Several parcels resent

 

Guys,

Normally the tracking number is updated in PayPal. If you cannot find the tracking info, especially for recent orders, please let me know so I will check if you have a new tracking number because your parcel was resent.

Thanks,
Adam
QRPBuilder new products

 

Gang,

?

QRPBuilder is announcing two new paddles. They are an iambic and single lever design similar to our other paddles, but are attached to your project by neodymium magnets, and can be moved from radio to radio, or removed for storage or transportation.

?

?

?

73,

?

Ken – wa4mnt
Re: ADX-S IF Adjustment

 

That explains things quite well.
?
Thank you Adam.
?
John L.
AA7US
Re: ADX-S IF Adjustment

 

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John,

Here is a write up in Chinese:



Thanks,
Adam

在 2024年10月9日，03:49，AA7US via groups.io <landrjoh@...> 写道：

?
Thanks Adam.
?
I'm curious about something (just trying to learn)…
?
Does the value of the capacitor connected to pin 5 of the CD2003 or Toshiba TA2003 affect the behavior of the AGC? ?I ask because the data sheets suggest that a 33uF capacitor should be used, yet the ADX-S uses a 10uF capacitor?
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