Date   
VXO variable range again

qrpjl1kra
 

Hi All,

Once I posted 15.570 crystal coverage.
I added 15.536MHz Super VXO crystal characteristics.
This crystal is good to hear CW segment in wide setting.
Linearity is good too.

See the following pic.

http://groups.yahoo.com/group/CHINA_QRP/photos/album/402154521/pic/1903138874/view

JL1KRA Junichi, Yokohama Japan

MY KN-Q7A IS ALMOST FINISHED

HAKAN GUNER
 

Dear Adam and All,

I finished my KN-Q7A on Saturday and my findings as follows:

1-Receiver part is working pretty good! I used two 15.570 xtals (different than supplied with the kit) and the range of VXO is around 200 kHz means whole band:)

2-For Transmitter part, I intend to use a dynamic mic with 600 ohms of impedance and I connected. There was no RF output even I tried to adjust TX BPF transformers! Later I traced the signal and I discovered that the level of my mic is not enough.

In this case, I will use a electret cond. mic which was supplied seperately (ICOM HM-35)and I will connect 1o kohm resistor as described in the manual.

Otherwise, I need a microphone preamplifier,

I think this need to be clarifed for further versions or just add mic preamp on PCB as an option.

73's de TA2LJ Hakan GUNER

Re: 6 meter cw kit

HAKAN GUNER
 

Hi All,
If we talk about 6 m, why not an SSB kit:)

TA2LJ Hakan

--- In CHINA_QRP@..., "ku4qw" <ku4qw@...> wrote:

I would like to see something like a cw 6 meter transceiver kit. I think would get a lot of people on 6, and would be fun first of it's kind. Anything like that coming out of China?

Re: MY KN-Q7A IS ALMOST FINISHED

Adam Rong
 

Hi Hakan,
 
Congratulations! Too wide VXO range is not recommended as it is not stable.
 
For microphone, you will need an electret type. Dynamic mic has too low output and it will not generate enough power.
 
Thanks,
Adam

On Mon, Mar 26, 2012 at 6:49 PM, HAKAN <ta2lj@...> wrote:
 


Dear Adam and All,

I finished my KN-Q7A on Saturday and my findings as follows:

1-Receiver part is working pretty good! I used two 15.570 xtals (different than supplied with the kit) and the range of VXO is around 200 kHz means whole band:)

2-For Transmitter part, I intend to use a dynamic mic with 600 ohms of impedance and I connected. There was no RF output even I tried to adjust TX BPF transformers! Later I traced the signal and I discovered that the level of my mic is not enough.

In this case, I will use a electret cond. mic which was supplied seperately (ICOM HM-35)and I will connect 1o kohm resistor as described in the manual.

Otherwise, I need a microphone preamplifier,

I think this need to be clarifed for further versions or just add mic preamp on PCB as an option.

73's de TA2LJ Hakan GUNER




--
Thanks,
Adam Rong

Re: MY KN-Q7A IS ALMOST FINISHED

HAKAN GUNER
 

Dear Adam,

I will check the stability and let you know later.

About Electret Mic. I have HM-35 Mic as you supplied. Is it directily connected to the KN-Q7 mic socket without doing any modifications?

--- In CHINA_QRP@..., Adam Rong <rongxh@...> wrote:

Hi Hakan,

Congratulations! Too wide VXO range is not recommended as it is not stable.

For microphone, you will need an electret type. Dynamic mic has too low
output and it will not generate enough power.

Thanks,
Adam

On Mon, Mar 26, 2012 at 6:49 PM, HAKAN <ta2lj@...> wrote:

**



Dear Adam and All,

I finished my KN-Q7A on Saturday and my findings as follows:

1-Receiver part is working pretty good! I used two 15.570 xtals (different
than supplied with the kit) and the range of VXO is around 200 kHz means
whole band:)

2-For Transmitter part, I intend to use a dynamic mic with 600 ohms of
impedance and I connected. There was no RF output even I tried to adjust TX
BPF transformers! Later I traced the signal and I discovered that the level
of my mic is not enough.

In this case, I will use a electret cond. mic which was supplied
seperately (ICOM HM-35)and I will connect 1o kohm resistor as described in
the manual.

Otherwise, I need a microphone preamplifier,

I think this need to be clarifed for further versions or just add mic
preamp on PCB as an option.

73's de TA2LJ Hakan GUNER




--
Thanks,
Adam Rong

Re: MY KN-Q7A IS ALMOST FINISHED

Adam Rong
 

Hi Hakan,
 
The supplier microphone should work well without modifications.
 
Thanks,
Adam, BD6CR/4

On Mon, Mar 26, 2012 at 7:40 PM, HAKAN <ta2lj@...> wrote:
 

Dear Adam,

I will check the stability and let you know later.

About Electret Mic. I have HM-35 Mic as you supplied. Is it directily connected to the KN-Q7 mic socket without doing any modifications?



--- In CHINA_QRP@..., Adam Rong >
> Hi Hakan,
>
> Congratulations! Too wide VXO range is not recommended as it is not stable.
>
> For microphone, you will need an electret type. Dynamic mic has too low
> output and it will not generate enough power.
>
> Thanks,
> Adam
>
> On Mon, Mar 26, 2012 at 6:49 PM, HAKAN wrote:
>
> > **

> >
> >
> >
> > Dear Adam and All,
> >
> > I finished my KN-Q7A on Saturday and my findings as follows:
> >
> > 1-Receiver part is working pretty good! I used two 15.570 xtals (different
> > than supplied with the kit) and the range of VXO is around 200 kHz means
> > whole band:)
> >
> > 2-For Transmitter part, I intend to use a dynamic mic with 600 ohms of
> > impedance and I connected. There was no RF output even I tried to adjust TX
> > BPF transformers! Later I traced the signal and I discovered that the level
> > of my mic is not enough.
> >
> > In this case, I will use a electret cond. mic which was supplied
> > seperately (ICOM HM-35)and I will connect 1o kohm resistor as described in
> > the manual.
> >
> > Otherwise, I need a microphone preamplifier,
> >
> > I think this need to be clarifed for further versions or just add mic
> > preamp on PCB as an option.
> >
> > 73's de TA2LJ Hakan GUNER
> >
> >
> >
>
>
>
> --
> Thanks,
> Adam Rong
>




--
Thanks,
Adam Rong

CRK-10 IS COMING!

Adam Rong
 

Folks,

So you have been waiting? Never mind, you will hear some good news soon.

CRK-10, a strange name, isn't it? It is a direct conversion CW transceiver kit, working at one frequency on 40 meter band, either 7010 or 7020 for now, and transmitting 3 watts at 12 volt. It was designed by BD4RG, the designer of the HB-1A and HB-1B, named as "super RM" or "Octopus" by Chinese QRPers. After a few modifications by the designer, I think it is better to rename to CRK-10 for worldwide.

It is a kit, but you only have to solder less than 20 through hole components (including all the connectors and buttons), because most of the SMD parts, including IC's, resistors, capacitors, transistors, and diodes are pre-assembled by the factory. Simple project does not mean ugly. It has a beautiful custom metal case with silkscreen printing. The case size is so compact that you can put it in your shirt pocket.

To preview the schematic, please see here
http://crkits.com/crk10schematic.pdf

Want to know how to order?
http://groups.yahoo.com/group/CHINA_QRP/message/585

Thanks,
Adam, BD6CR/4

KNQ10A in air !

Hasse
 

Hi guys !

Just wnat to tell that after a month in air with my home made KNQ10A
4-band kit i must say that i`m nore than happy.It works good as
a factory built one.Many qso:s- USA on 15m-New Zeeland on 14 and so on.
I will finish this with give my very best credit to Adam,Mark and
others who has being involed in this project.THANKS GUYS !!!!!!!!!
Bst 73 de sm6mpa/Hasse
a little ps.May be in future there will be an upgrade-pcb for knq10a.
for 10 meter.I can ind it in the MCU-so i guess it`s just the harware
thats remains .Ds

Looking for unbuilt kits?

Pete Meier <pmeier@...>
 

Hello everyone,

I just discovered this group and the KN series of radios. However, I like to solder!

So if anyone has a "un-built" kit for sale please email with what you have and what your price is.
Please also include what type of payment you might accept.

Thanks,

Pete WK8S

Re: Looking for unbuilt kits?

Bay Mete
 

Hi Pete,
I think you have to try that link to buy a great new unsoldered kit:
 
Regards,
Mete TA3EP


 
27 Mart 2012 15:34 Pete Meier <pmeier@...> wrote:

 

Hello everyone,

I just discovered this group and the KN series of radios. However, I like to solder!

So if anyone has a "un-built" kit for sale please email with what you have and what your price is.
Please also include what type of payment you might accept.

Thanks,

Pete WK8S



Re: Looking for unbuilt kits?

n7rgw
 

For the US market, I try to stock this product for shorter delivery time.  I pre-drill holes and include IC sockets.

I also provide email and phone support for the product in the US.  www.QRVTronics.com.

Larry

Follow me at twitter.com

Adam Rong
 

Folks,
 
You can follow me at twitter.com/bd6cr to know more info.

--
Thanks,
Adam Rong, BD6CR/4

CW for KN-Q7A ??

Pete Meier <pmeier@...>
 

Hello all,

Just wondering if anyone has tried adding CW to KN-Q7A? If so please share your circuit add on.

Tnx,

Pete WK8S

Starting a KN-Q7 in Argentina

criminalmente <maffia@...>
 

We bought two kits and yesterday y build mine. All looks OK, but I can't detect oscillations in BOTH NE602.
Usually, NE602 give a powerfull signal thru pin 7, but I was unable to detect it.
I'm using a 100 Mhz oscilloscope and X10 probe.
Something have experienced this trouble?
The kit is awesome and overpassed my expectatives. I was inactive near 40 years and now i'm returning.
Regards.
Edgardo Maffia LU1-AR Buenos Aires - Argentina

Re: Starting a KN-Q7 in Argentina

Adam Rong
 

Edgardo,

Please double check the orientation of 47 pF capacitors between pin 6 and pin 7 of both NE602's. People make mistakes here.

Thanks,
Adam, BD6CR/4

-- Sent from my HP TouchPad


On 31 Mar 2012 07:08, criminalmente wrote:
 

We bought two kits and yesterday y build mine. All looks OK, but I can't detect oscillations in BOTH NE602.
Usually, NE602 give a powerfull signal thru pin 7, but I was unable to detect it.
I'm using a 100 Mhz oscilloscope and X10 probe.
Something have experienced this trouble?
The kit is awesome and overpassed my expectatives. I was inactive near 40 years and now i'm returning.
Regards.
Edgardo Maffia LU1-AR Buenos Aires - Argentina

Re: CW for KN-Q7A ??

qrpjl1kra
 

Hi Pete,WK8S

This topic was discussed messages around #445.

Good luck and 73!

Junichi JL1KRA

--- In CHINA_QRP@..., Pete Meier <pmeier@...> wrote:

Hello all,

Just wondering if anyone has tried adding CW to KN-Q7A? If so please share your circuit add on.

Tnx,

Pete WK8S

Re: Starting a KN-Q7 in Argentina

criminalmente <maffia@...>
 

Dear Adam: Just you solved my trouble WITH A LITTLE HEL FROM MY FRIENDS.
You with this answer and Jon Iza EA2SN who mail me the same solution.
Thanks both. Solved it
Now I begin to tame the transmitter.
Thanks both.
Edgardo Maffía LU1AR - Argentina

Re: Starting a KN-Q7 in Argentina

Adam Rong
 

Edgardo,
 
It is nice to hear that you have fixed the problem. Take time and enjoy the fun!
 
Thanks,
Adam, BD6CR/4

On Sun, Apr 1, 2012 at 12:06 AM, criminalmente <maffia@...> wrote:
 


Dear Adam: Just you solved my trouble WITH A LITTLE HEL FROM MY FRIENDS.
You with this answer and Jon Iza EA2SN who mail me the same solution.
Thanks both. Solved it
Now I begin to tame the transmitter.
Thanks both.
Edgardo Maffía LU1AR - Argentina




--
Thanks,
Adam Rong

Re: Starting a KN-Q7 in Argentina

ce3eoa
 

Edgardo:


I live in Chile, and I operate a KN-Q7 in the 7050khz to 7070Khz, maybe we can arrange a contact.


73, de Patricio, CE3EOA

--- In CHINA_QRP@..., "criminalmente" <maffia@...> wrote:

We bought two kits and yesterday y build mine. All looks OK, but I can't detect oscillations in BOTH NE602.
Usually, NE602 give a powerfull signal thru pin 7, but I was unable to detect it.
I'm using a 100 Mhz oscilloscope and X10 probe.
Something have experienced this trouble?
The kit is awesome and overpassed my expectatives. I was inactive near 40 years and now i'm returning.
Regards.
Edgardo Maffia LU1-AR Buenos Aires - Argentina

Re: Starting a KN-Q7 in Argentina

n7rgw
 

This may not be your problem, but this is what I check.

1)      Check the orientation of the NE602.

2)      Check the solder joints to make certain that you don’t have any solder bridges.

3)      Check the voltages on each pin.  This can give you an idea as to where the problem is.

4)      My KN-Q7A worked well, but I accidently also blew up one of the NE602’s and had to replace it.  Voltages verified that it was dead.

 

Larry – 73’s N7RGW