Date   
Re: Take a look at our new banner

Charlie Vest
 

Looks like a great place for a holiday !!

Charlie , W5COV

On 11/17/2013 7:47 AM, Adam Rong wrote:
 

Here is more:
https://www.dropbox.com/sh/lz2gq91gv8lv5n4/UXhUYShzFa

The trip was great. I spent 8 days with my wife and son. It left me backlog orders but today I cleared all.

Thanks,
Adam

On 2013/11/17 21:24, Paul W. Ross wrote:
 

My, that is pretty!

73 /paul W3FIS



Re: Take a look at our new banner

multilec1
 

Question is, are there any fish? If so, what are they and can we eat them?
;)



From: Charlie , W5COV <cvest@...>;
To: <CHINA_QRP@...>;
Subject: Re: [CHINA_QRP] Re: Take a look at our new banner
Sent: Sun, Nov 17, 2013 7:06:35 PM

 

Looks like a great place for a holiday !!

Charlie , W5COV

On 11/17/2013 7:47 AM, Adam Rong wrote:
 

Here is more:
https://www.dropbox.com/sh/lz2gq91gv8lv5n4/UXhUYShzFa

The trip was great. I spent 8 days with my wife and son. It left me backlog orders but today I cleared all.

Thanks,
Adam

On 2013/11/17 21:24, Paul W. Ross wrote:
 

My, that is pretty!

73 /paul W3FIS



Recieve audio garbled when recieving strong SSB signal.

Brian Schmitt
 

    I had attempted to use the 20 meter knq7a this weekend for the ARRL Sweepstakes. 

    Weak/distant stations where clearly readable while most nearby/strong signals where unintelligible audio.

I had adjusted the BFO capacitor and had no success in making the signal intelligible.  I could confirm with another receiver (Icom IC-730) that the signal was readable on another radio with the same recieve antenna.

Any Suggestions?

Thank you
Brian

Re: Recieve audio garbled when recieving strong SSB signal.

Adam Rong
 

Brian,

You must have a good antenna. It seems to be overloading in the front end or IF. If by tuning IF GAIN potentiometer you cannot get anything better, you can consider attenuating at the front end. If your board is earlier version than V2.2, there is a trimmer marked as RF ATT, and you can turn it. From V2.2, the trimmer is removed, but still you can find a way to attenuate signal.

Thanks,
Adam

On 2013/11/18 12:45, brianschmitt001@... wrote:
 
    I had attempted to use the 20 meter knq7a this weekend for the ARRL Sweepstakes. 

    Weak/distant stations where clearly readable while most nearby/strong signals where unintelligible audio.

I had adjusted the BFO capacitor and had no success in making the signal intelligible.  I could confirm with another receiver (Icom IC-730) that the signal was readable on another radio with the same recieve antenna.

Any Suggestions?

Thank you
Brian


Re: Recieve audio garbled when recieving strong SSB signal.

Paul W. Ross <deadgoose@...>
 

From my limited experience with the KN-Q7A, it looks like it overloads on strong stations. Cutting the IF gain WAY back seems to solve the problem nicely.

73 /paul W3FIS

Re: Take a look at our new banner

Adam Rong
 

Yes, we bought some dried whitebait (we call silver fish), and my father cooked with eggs. Very delicious.


On Mon, Nov 18, 2013 at 12:10 PM, Nigel Young <multilec1@...> wrote:
 

Question is, are there any fish? If so, what are they and can we eat them?
;)



From: Charlie , W5COV <cvest@...>;
To: <CHINA_QRP@...>;
Subject: Re: [CHINA_QRP] Re: Take a look at our new banner
Sent: Sun, Nov 17, 2013 7:06:35 PM

 

Looks like a great place for a holiday !!

Charlie , W5COV

On 11/17/2013 7:47 AM, Adam Rong wrote:
 

Here is more:
https://www.dropbox.com/sh/lz2gq91gv8lv5n4/UXhUYShzFa

The trip was great. I spent 8 days with my wife and son. It left me backlog orders but today I cleared all.

Thanks,
Adam

On 2013/11/17 21:24, Paul W. Ross wrote:
 

My, that is pretty!

73 /paul W3FIS






--
Thanks,
Adam Rong

Re: knq-7a voice distortion

anthony jaen
 

hi 
i did measure the voltage from the source the terminals of the power supply the voltage is 12 volts no variation from listening that is still 12 volts and i also tried a 12 volts 5 amper switching power supply a reyed 60 watt its still 12 from the terminal no variation and the distortion is back but when i use a modified pc computer switching there is no distortion the pc computer switch power supply maybe has a higher rating than the reyed 60. i will try opening the knq7a this weekend and measure the voltage after the regulator  chip and we will see if varies or fluctuates when i transmit
 
Anthony Christian Montinola Jaen
Keyboard Basher & Tinkerer 


On Sunday, November 17, 2013 8:44 PM, Adam Rong wrote:
 
Jan,

Thanks for your suggestions. By hearing the recorded signal, I guess the problem is the latter. I have asked him to measure the voltage drop during TX. He did mention that there is no problem when he used a switching supply.

Thanks,
Adam

On 2013/11/17 2:42, Jan.Verduyn@... wrote:
 
KN-Q7A distortion -
Here are 2 things to check to stop the audio distortion on transmit:

1) Is the distortion gone when you speak farther away from the microphone?
Are you using the Speaker Mike supplied by CR-Kits.   if so you can reduce the 10K resistor which
biasses the Electret microphone to 4.7 kOhm.  This can be tested quickly by plugging a second 10k resistor  between pin 1 (+8V) and pin 3 (Mic) on top of the Microphone header.    This should reduce the audio input into the NE602 balanced modulator when using a high output electret microphone element.

2. Check the DC voltage on 7808 Regulator output.   It should be approx 8V DC   but NOT vary when
you speak in the Microphone.    If it does, then  a) check you have at least 12.0V DC available on the KN-Q7A Powersupply Jack during transmit. With 10W RF output you easily loose 1.3V DC over the  1N5407 Diode. The 7808 needs at least 10V to stabilize 8V...     Check DC Powersupply cable and the plug
for voltage drops.

Good luck  Jan G0BBL   SDR-Kits


---In CHINA_QRP@..., wrote:

hi adam 
i have recorded the knq-7a the distortion on the 7.075mhz there was no distortion only when it starts above it here is the link of the recording http://www.youtube.com/watch?v=nqlcARtPE-g here is the recording with no distortion http://www.youtube.com/watch?v=S2ux-2wNFkQ if you can notice the higher the frequency the more the distortion. do you have any ideas what is wrong with the rig i suspect the 7808 regulator it does not give enough power
73



Re: knq-7a voice distortion

anthony jaen
 

its 12 volts after the power supply  and 7 volts after the 7808 regulator pressing the ptt and  talking to the microphone its 7 volts 6volts and 7 volts
 
Anthony Christian Montinola Jaen
Keyboard Basher & Tinkerer 


On Tuesday, November 19, 2013 8:09 PM, anthony jaen wrote:
 
hi 
i did measure the voltage from the source the terminals of the power supply the voltage is 12 volts no variation from listening that is still 12 volts and i also tried a 12 volts 5 amper switching power supply a reyed 60 watt its still 12 from the terminal no variation and the distortion is back but when i use a modified pc computer switching there is no distortion the pc computer switch power supply maybe has a higher rating than the reyed 60. i will try opening the knq7a this weekend and measure the voltage after the regulator  chip and we will see if varies or fluctuates when i transmit
 
Anthony Christian Montinola Jaen
Keyboard Basher & Tinkerer 


On Sunday, November 17, 2013 8:44 PM, Adam Rong wrote:
 
Jan,

Thanks for your suggestions. By hearing the recorded signal, I guess the problem is the latter. I have asked him to measure the voltage drop during TX. He did mention that there is no problem when he used a switching supply.

Thanks,
Adam

On 2013/11/17 2:42, Jan.Verduyn@... wrote:
 
KN-Q7A distortion -
Here are 2 things to check to stop the audio distortion on transmit:

1) Is the distortion gone when you speak farther away from the microphone?
Are you using the Speaker Mike supplied by CR-Kits.   if so you can reduce the 10K resistor which
biasses the Electret microphone to 4.7 kOhm.  This can be tested quickly by plugging a second 10k resistor  between pin 1 (+8V) and pin 3 (Mic) on top of the Microphone header.    This should reduce the audio input into the NE602 balanced modulator when using a high output electret microphone element.

2. Check the DC voltage on 7808 Regulator output.   It should be approx 8V DC   but NOT vary when
you speak in the Microphone.    If it does, then  a) check you have at least 12.0V DC available on the KN-Q7A Powersupply Jack during transmit. With 10W RF output you easily loose 1.3V DC over the  1N5407 Diode. The 7808 needs at least 10V to stabilize 8V...     Check DC Powersupply cable and the plug
for voltage drops.

Good luck  Jan G0BBL   SDR-Kits


---In CHINA_QRP@..., wrote:

hi adam 
i have recorded the knq-7a the distortion on the 7.075mhz there was no distortion only when it starts above it here is the link of the recording http://www.youtube.com/watch?v=nqlcARtPE-g here is the recording with no distortion http://www.youtube.com/watch?v=S2ux-2wNFkQ if you can notice the higher the frequency the more the distortion. do you have any ideas what is wrong with the rig i suspect the 7808 regulator it does not give enough power
73





Re: Take a look at our new banner

Paul W. Ross <deadgoose@...>
 

Of course, this is all very "off topic," but we would love some more pictures of your beautiful country!

73 /paul W3FIS

Re: knq-7a voice distortion

n7rgw
 

It would appear that the 8 volt regulator is not operating properly. I assume that it is 8V when in receive. Sometimes the C3357 is not operating properly and draws too much power. If as you say, you still have 12 volts in transmit, but 7 volts on the regulator, something is drawing too much current. Measure the current being drawn. Should be about 40mA receive and about 600mA on transmit and up to about 1.3A when modulated.
I suspect that the C3357 may have been damaged.
Larry, N7RGW

--- In CHINA_QRP@..., anthony jaen <chickenjoymanok@...> wrote:

its 12 volts after the power supply  and 7 volts after the 7808 regulator pressing the ptt and  talking to the microphone its 7 volts 6volts and 7 volts
 
Anthony Christian Montinola Jaen
Keyboard Basher & Tinkerer 



On Tuesday, November 19, 2013 8:09 PM, anthony jaen <chickenjoymanok@...> wrote:

 
hi 
i did measure the voltage from the source the terminals of the power supply the voltage is 12 volts no variation from listening that is still 12 volts and i also tried a 12 volts 5 amper switching power supply a reyed 60 watt its still 12 from the terminal no variation and the distortion is back but when i use a modified pc computer switching there is no distortion the pc computer switch power supply maybe has a higher rating than the reyed 60. i will try opening the knq7a this weekend and measure the voltage after the regulator  chip and we will see if varies or fluctuates when i transmit
 
Anthony Christian Montinola Jaen
Keyboard Basher & Tinkerer 



On Sunday, November 17, 2013 8:44 PM, Adam Rong <rongxh@...> wrote:

 
Jan,

Thanks for your suggestions. By hearing the recorded signal, I
guess the problem is the latter. I have asked him to measure the
voltage drop during TX. He did mention that there is no problem
when he used a switching supply.

Thanks,
Adam

On 2013/11/17 2:42, Jan.Verduyn@... wrote:

 
KN-Q7A distortion -
Here are 2 things to check to stop the audio distortion on
transmit:

1) Is the distortion gone when you speak farther away from
the microphone?
Are you using the Speaker Mike supplied by CR-Kits.   if
so you can reduce the 10K resistor which
biasses the Electret microphone to 4.7 kOhm.  This can be
tested quickly by plugging a second 10k resistor  between
pin 1 (+8V) and pin 3 (Mic) on top of the Microphone
header.    This should reduce the audio input into the
NE602 balanced modulator when using a high output electret
microphone element.

2. Check the DC voltage on 7808 Regulator output.   It
should be approx 8V DC   but NOT vary when
you speak in the Microphone.    If it does, then  a) check
you have at least 12.0V DC available on the KN-Q7A
Powersupply Jack during transmit. With 10W RF output you
easily loose 1.3V DC over the  1N5407 Diode. The 7808
needs at least 10V to stabilize 8V...     Check DC
Powersupply cable and the plug
for voltage drops.

Good luck  Jan G0BBL   SDR-Kits



---In CHINA_QRP@..., <chickenjoymanok@> wrote:


hi adam 
i have recorded the knq-7a the distortion on the 7.075mhz there was no distortion only when it starts above it here is the link of the recording http://www.youtube.com/watch?v=nqlcARtPE-g here is the recording with no distortion http://www.youtube.com/watch?v=S2ux-2wNFkQ if you can notice the higher the frequency the more the distortion. do you have any ideas what is wrong with the rig i suspect the 7808 regulator it does not give enough power
73

Re: knq-7a voice distortion

anthony jaen
 

i will do test using multimeter  



---In CHINA_QRP@..., <larry.lovell@...> wrote:

It would appear that the 8 volt regulator is not operating properly. I assume that it is 8V when in receive. Sometimes the C3357 is not operating properly and draws too much power. If as you say, you still have 12 volts in transmit, but 7 volts on the regulator, something is drawing too much current. Measure the current being drawn. Should be about 40mA receive and about 600mA on transmit and up to about 1.3A when modulated.
I suspect that the C3357 may have been damaged.
Larry, N7RGW

--- In CHINA_QRP@..., anthony jaen <chickenjoymanok@...> wrote:
>
> its 12 volts after the power supply  and 7 volts after the 7808 regulator pressing the ptt and  talking to the microphone its 7 volts 6volts and 7 volts
>  
> Anthony Christian Montinola Jaen
> Keyboard Basher & Tinkerer 
>
>
>
> On Tuesday, November 19, 2013 8:09 PM, anthony jaen <chickenjoymanok@...> wrote:
>
>  
> hi 
> i did measure the voltage from the source the terminals of the power supply the voltage is 12 volts no variation from listening that is still 12 volts and i also tried a 12 volts 5 amper switching power supply a reyed 60 watt its still 12 from the terminal no variation and the distortion is back but when i use a modified pc computer switching there is no distortion the pc computer switch power supply maybe has a higher rating than the reyed 60. i will try opening the knq7a this weekend and measure the voltage after the regulator  chip and we will see if varies or fluctuates when i transmit
>  
> Anthony Christian Montinola Jaen
> Keyboard Basher & Tinkerer 
>
>
>
> On Sunday, November 17, 2013 8:44 PM, Adam Rong <rongxh@...> wrote:
>
>  
> Jan,
>
> Thanks for your suggestions. By hearing the recorded signal, I
> guess the problem is the latter. I have asked him to measure the
> voltage drop during TX. He did mention that there is no problem
> when he used a switching supply.
>
> Thanks,
> Adam
>
> On 2013/11/17 2:42, Jan.Verduyn@... wrote:
>
>  
> >KN-Q7A distortion -
> >Here are 2 things to check to stop the audio distortion on
> transmit:
> >
> >1) Is the distortion gone when you speak farther away from
> the microphone?
> >Are you using the Speaker Mike supplied by CR-Kits.   if
> so you can reduce the 10K resistor which
> >biasses the Electret microphone to 4.7 kOhm.  This can be
> tested quickly by plugging a second 10k resistor  between
> pin 1 (+8V) and pin 3 (Mic) on top of the Microphone
> header.    This should reduce the audio input into the
> NE602 balanced modulator when using a high output electret
> microphone element.
> >
> >2. Check the DC voltage on 7808 Regulator output.   It
> should be approx 8V DC   but NOT vary when
> >you speak in the Microphone.    If it does, then  a) check
> you have at least 12.0V DC available on the KN-Q7A
> Powersupply Jack during transmit. With 10W RF output you
> easily loose 1.3V DC over the  1N5407 Diode. The 7808
> needs at least 10V to stabilize 8V...     Check DC
> Powersupply cable and the plug
> >for voltage drops.
> >
> >Good luck  Jan G0BBL   SDR-Kits
> >
> >
> >
> >---In CHINA_QRP@..., <chickenjoymanok@> wrote:
> >
> >
> >hi adam 
> >i have recorded the knq-7a the distortion on the 7.075mhz there was no distortion only when it starts above it here is the link of the recording http://www.youtube.com/watch?v=nqlcARtPE-g here is the recording with no distortion http://www.youtube.com/watch?v=S2ux-2wNFkQ if you can notice the higher the frequency the more the distortion. do you have any ideas what is wrong with the rig i suspect the 7808 regulator it does not give enough power
> >73
>

relief and rescue frequency 7.095mhz

anthony jaen
 

we are requesting contest stations and other stations alike to pls avoid 7.095 mhz  and adjacent frequencies offsets of cw as we philippine stations would appreciate the kind gesture as we know we have been struggling to provide rescue and moving food and water and shelter materials to survivors

 thank you
DV6WAJ 

Re: relief and rescue frequency 7.095mhz

Adam Rong
 

God bless you guys. Take care.

Thanks,
Adam

在 2013-11-24 下午3:41, <chickenjoymanok@...>写道:

 

we are requesting contest stations and other stations alike to pls avoid 7.095 mhz  and adjacent frequencies offsets of cw as we philippine stations would appreciate the kind gesture as we know we have been struggling to provide rescue and moving food and water and shelter materials to survivors

 thank you
DV6WAJ 

Re: knq-7a voice distortion

anthony jaen
 

i think i have fixed the knq7a i dont have a power meter or an swr/power meter (i just borrow from a friend) i havent measured the  power output but the distortion now gone what i have done is changed the regulator ic to fairchild electronics ka7808 ic and made a larger dc power cord i and have made a few contacts like the net control and the palawan island like 300 miles from me  and also using the rg58 homebrew double bazooka 30 meters above the ground in a cramped space. 



---In CHINA_QRP@..., <chickenjoymanok@...> wrote:

i will do test using multimeter  



---In CHINA_QRP@..., <larry.lovell@...> wrote:

It would appear that the 8 volt regulator is not operating properly. I assume that it is 8V when in receive. Sometimes the C3357 is not operating properly and draws too much power. If as you say, you still have 12 volts in transmit, but 7 volts on the regulator, something is drawing too much current. Measure the current being drawn. Should be about 40mA receive and about 600mA on transmit and up to about 1.3A when modulated.
I suspect that the C3357 may have been damaged.
Larry, N7RGW

--- In CHINA_QRP@..., anthony jaen <chickenjoymanok@...> wrote:
>
> its 12 volts after the power supply  and 7 volts after the 7808 regulator pressing the ptt and  talking to the microphone its 7 volts 6volts and 7 volts
>  
> Anthony Christian Montinola Jaen
> Keyboard Basher & Tinkerer 
>
>
>
> On Tuesday, November 19, 2013 8:09 PM, anthony jaen <chickenjoymanok@...> wrote:
>
>  
> hi 
> i did measure the voltage from the source the terminals of the power supply the voltage is 12 volts no variation from listening that is still 12 volts and i also tried a 12 volts 5 amper switching power supply a reyed 60 watt its still 12 from the terminal no variation and the distortion is back but when i use a modified pc computer switching there is no distortion the pc computer switch power supply maybe has a higher rating than the reyed 60. i will try opening the knq7a this weekend and measure the voltage after the regulator  chip and we will see if varies or fluctuates when i transmit
>  
> Anthony Christian Montinola Jaen
> Keyboard Basher & Tinkerer 
>
>
>
> On Sunday, November 17, 2013 8:44 PM, Adam Rong <rongxh@...> wrote:
>
>  
> Jan,
>
> Thanks for your suggestions. By hearing the recorded signal, I
> guess the problem is the latter. I have asked him to measure the
> voltage drop during TX. He did mention that there is no problem
> when he used a switching supply.
>
> Thanks,
> Adam
>
> On 2013/11/17 2:42, Jan.Verduyn@... wrote:
>
>  
> >KN-Q7A distortion -
> >Here are 2 things to check to stop the audio distortion on
> transmit:
> >
> >1) Is the distortion gone when you speak farther away from
> the microphone?
> >Are you using the Speaker Mike supplied by CR-Kits.   if
> so you can reduce the 10K resistor which
> >biasses the Electret microphone to 4.7 kOhm.  This can be
> tested quickly by plugging a second 10k resistor  between
> pin 1 (+8V) and pin 3 (Mic) on top of the Microphone
> header.    This should reduce the audio input into the
> NE602 balanced modulator when using a high output electret
> microphone element.
> >
> >2. Check the DC voltage on 7808 Regulator output.   It
> should be approx 8V DC   but NOT vary when
> >you speak in the Microphone.    If it does, then  a) check
> you have at least 12.0V DC available on the KN-Q7A
> Powersupply Jack during transmit. With 10W RF output you
> easily loose 1.3V DC over the  1N5407 Diode. The 7808
> needs at least 10V to stabilize 8V...     Check DC
> Powersupply cable and the plug
> >for voltage drops.
> >
> >Good luck  Jan G0BBL   SDR-Kits
> >
> >
> >
> >---In CHINA_QRP@..., <chickenjoymanok@> wrote:
> >
> >
> >hi adam 
> >i have recorded the knq-7a the distortion on the 7.075mhz there was no distortion only when it starts above it here is the link of the recording http://www.youtube.com/watch?v=nqlcARtPE-g here is the recording with no distortion http://www.youtube.com/watch?v=S2ux-2wNFkQ if you can notice the higher the frequency the more the distortion. do you have any ideas what is wrong with the rig i suspect the 7808 regulator it does not give enough power
> >73
>

A small modification for KN-Q7A kit

Adam Rong
 

Folks,

Recently I have tested the drop out voltage of the polarity protection diodes @ 2 A. The stock 1N5401 is about 0.8 volt, while 1N5822 is about 0.4 volt. If you use 1N5820, it should be a bit even lower than 1N5822. It means that if you have 1N5820, 1N5821 or 1N5822 in your junk box, you can consider replacing the stock 1N5401, so you can get slightly bigger RF power with the same voltage of power supply. It is important especially if you are using battery pack in field.

Thanks,
Adam

Re: A small modification for KN-Q7A kit

maffia@...
 

In my heavily modified KNQ7, I shorted the diodes and run the DC input thru a 3 Amp. fuse to the switch, in the RF gain potentiometer. The diodes are IN PARALELL in the DC path, after the fuse. This gain near 1/2 watt.
Regards.
Edgardo Maffia LU1AR

KNQ7A QSO from the philippines to sumatra

anthony jaen
 

after i fixed my knq7a i made the first DX using the knq7a from the philippines to sumatra using a double bazooka wire antenna 30 feet from ground on a bamboo pole that means im doing something right now happy

Re: KNQ7A QSO from the philippines to sumatra

Adam Rong
 

Congratulations. Well done.

在 2013-12-8 下午11:08, <chickenjoymanok@...>写道:

 

after i fixed my knq7a i made the first DX using the knq7a from the philippines to sumatra using a double bazooka wire antenna 30 feet from ground on a bamboo pole that means im doing something right now happy

Re: KNQ7A QSO from the philippines to sumatra

anthony jaen
 

i need to do the diode modification that you sugested adam because i have to shout on the mic to get a better watt output thanks for the sugestion

 
Anthony Christian Montinola Jaen
Keyboard Basher & Tinkerer 


On Monday, December 9, 2013 2:48 PM, Adam Rong wrote:
 
Congratulations. Well done.
在 2013-12-8 下午11:08, <chickenjoymanok@...>写道:
 
after i fixed my knq7a i made the first DX using the knq7a from the philippines to sumatra using a double bazooka wire antenna 30 feet from ground on a bamboo pole that means im doing something right now happy


AM Radio Receiver Kit

Adam Rong
 

Folks,

The No. 1 Chinese brand Tecsun recently produced an AM radio receiver kit 2P3. The model was produced about 50 years ago, but is still welcomed by Chinese fans. The domestic price is 100 RMB and the shipping cost to abroad is about 100 RMB since it weights about 800 grams. If you are interested, I am willing to resell it at 39 USD including air shipping with tracking. It will be only available to this group, and the service will be email only, no manual translation is promised, but you can make it by referring to the original manual with many colorful photos.

To place an order, send payment to my PayPal rongxh@... and leave your ship to address.

Thanks,
Adam