Date   
Re: Introducing KN-Q7A single band SSB transceiver kit

Adam Rong
 

Hi all,
 
I have received the crystals specially made for Europe, and it is very easy to cover 7080~7100 range. I also found that by turning the slug of the IFT down a little bit, it can cover 7050~7095 which is great news for us. One crystal can cover both Asia and Europe frequencies now.
 
Although I am still waiting for one potentiometer to be delivered to me, I can estimate the first customer ship date for kit to be Oct. 15, and assembled kit to be Oct. 22.
 
Stay tuned for our further update.
 
73 de BD6CR/4, Adam

On Fri, Oct 7, 2011 at 11:18 AM, RONGXINHUA <rongxh@...> wrote:
 

Hi all,

I have successfully built the production KN-Q7A and the final product photo is located here:
http://www.qsl.net/bd6cr/KNQ7A.JPG

It will take a few days to receive the crystals for Europe band, and I am starting to do the kitting now. The schedule is on track, and I will let you know the first customer ship date when it is available.

73 de BD6CR/4, Adam


--- In CHINA_QRP@..., Xinhua Rong wrote:
>
> Hi all,
>
> The popular KN-Q7 is back! Now it is even better! We are introducing
> KN-Q7A, a new single band (now available in 40m band) SSB transceiver
> kit designed specifically for the worldwide market by BA6BF and provided
> by BD6CR/4. Improved design, select components, and lower price!
>
> *Key specification*

>
> Dimension: 153mm x 97mm x 40mm, not including protruding features
> Weight: 500g or 1.1 lbs
> Power Supply: 13.8V/ 3A
> Current consumption: 30mA in RX and about 2A in TX, measured at 13.8V
> RF output: about 10W PEP at 13.8V
> Sensitivity: better than 0.5uV at 10dB SNR
> IF filter: 6 pole + 1 pole crystal ladder filter
> IF bandwidth: about 2.5kHz
> IF frequency: 8.467MHz
> Frequency range: about 20kHz in super VXO type
> Connectors:
> Speaker output: 3.5mm connector, mono output
> Microphone input: 8-pin, can be configured to be compatible with
> electret microphones on hand
> Antenna connector: M type, rear panel mount
> Controls:
> IF Gain Control: act as volume control
> Tune Control
> On board RF Attenuator trimmer to eliminate broadcast interference
>
> *Main Improvement from KN-Q7*

>
> Improved LPF circuit to be tested to meet -43dB standard
> Added post IF AMP one pole crystal filter to reduce background noise
> Removed RX/TX indicator LED to even reduce RX current consumption by
> about 5mA (from 35mA to 30mA)
> Added one on-board RF attenuator in receiver front end to eliminate
> broadcast interference
> Added power polarity protection
> 25% bigger chassis area as heat sink to reduce thermal drift
> More frequency coverage including popular Europe frequency 7.090MHz or
> around, besides the original 7.050-7.070MHz coverage
> Matched IF filter crystals to ensure good selectivity
> Selected components to improve circuit stability and overall build
> experience
>
> *Price, payment and order*

>
> Introductory price from now to Oct 31, 2011 is 99 USD per kit, list
> price is 115 USD per kit from Nov 1, 2011. The time means the time of
> payment.
> Optional microphone is also offered at 20 USD if you buy along with the
> kit, or 25 USD if you buy separately.
> If you need the kit assembled and tested, 25 USD needs to be added and
> allow lead time of about one week.
> We are shipping directly from China to the worldwide by post office air
> parcel service. The shipping cost is 25 USD per kit for worldwide, and
> it will take about 7 to 21 days to arrive Asia, Europe, Oceania and
> North America, and a bit more time to arrive South America and Africa
> (varies by country).
> We only accept email order and can accept paypal payment, and our email
> and paypal account is rongxh(at)gmail.com, please replace (at) with @.
> Contact us by email if you prefer other way of payment. We provide full
> refund if you change your mind any time before the shipment.
> Please specify Europe or Asia frequency range when you order by email.
> We plan to ship the kit by the end of October or a bit earlier.
>
> *Notes*

>
> There is no full printed manual included in each kit to stay green. Only
> PDF format is offered online. Manual will be available by the time you
> get your kit.
> Product photos will be provided later in this yahoo group. First
> customer ship date will be notified as soon as available.
>
> 73 de BD6CR/4, Adam
>


Re: Introducing KN-Q7A single band SSB transceiver kit

Adam Rong
 

Hi all,

I have successfully built the production KN-Q7A and the final product photo is located here:
http://www.qsl.net/bd6cr/KNQ7A.JPG

It will take a few days to receive the crystals for Europe band, and I am starting to do the kitting now. The schedule is on track, and I will let you know the first customer ship date when it is available.

73 de BD6CR/4, Adam

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

Hi all,

The popular KN-Q7 is back! Now it is even better! We are introducing
KN-Q7A, a new single band (now available in 40m band) SSB transceiver
kit designed specifically for the worldwide market by BA6BF and provided
by BD6CR/4. Improved design, select components, and lower price!

*Key specification*

Dimension: 153mm x 97mm x 40mm, not including protruding features
Weight: 500g or 1.1 lbs
Power Supply: 13.8V/ 3A
Current consumption: 30mA in RX and about 2A in TX, measured at 13.8V
RF output: about 10W PEP at 13.8V
Sensitivity: better than 0.5uV at 10dB SNR
IF filter: 6 pole + 1 pole crystal ladder filter
IF bandwidth: about 2.5kHz
IF frequency: 8.467MHz
Frequency range: about 20kHz in super VXO type
Connectors:
Speaker output: 3.5mm connector, mono output
Microphone input: 8-pin, can be configured to be compatible with
electret microphones on hand
Antenna connector: M type, rear panel mount
Controls:
IF Gain Control: act as volume control
Tune Control
On board RF Attenuator trimmer to eliminate broadcast interference

*Main Improvement from KN-Q7*

Improved LPF circuit to be tested to meet -43dB standard
Added post IF AMP one pole crystal filter to reduce background noise
Removed RX/TX indicator LED to even reduce RX current consumption by
about 5mA (from 35mA to 30mA)
Added one on-board RF attenuator in receiver front end to eliminate
broadcast interference
Added power polarity protection
25% bigger chassis area as heat sink to reduce thermal drift
More frequency coverage including popular Europe frequency 7.090MHz or
around, besides the original 7.050-7.070MHz coverage
Matched IF filter crystals to ensure good selectivity
Selected components to improve circuit stability and overall build
experience

*Price, payment and order*

Introductory price from now to Oct 31, 2011 is 99 USD per kit, list
price is 115 USD per kit from Nov 1, 2011. The time means the time of
payment.
Optional microphone is also offered at 20 USD if you buy along with the
kit, or 25 USD if you buy separately.
If you need the kit assembled and tested, 25 USD needs to be added and
allow lead time of about one week.
We are shipping directly from China to the worldwide by post office air
parcel service. The shipping cost is 25 USD per kit for worldwide, and
it will take about 7 to 21 days to arrive Asia, Europe, Oceania and
North America, and a bit more time to arrive South America and Africa
(varies by country).
We only accept email order and can accept paypal payment, and our email
and paypal account is rongxh(at)gmail.com, please replace (at) with @.
Contact us by email if you prefer other way of payment. We provide full
refund if you change your mind any time before the shipment.
Please specify Europe or Asia frequency range when you order by email.
We plan to ship the kit by the end of October or a bit earlier.

*Notes*

There is no full printed manual included in each kit to stay green. Only
PDF format is offered online. Manual will be available by the time you
get your kit.
Product photos will be provided later in this yahoo group. First
customer ship date will be notified as soon as available.

73 de BD6CR/4, Adam

Re: Introducing KN-Q7A single band SSB transceiver kit

Adam Rong
 

Yes, I still have a few. They should arrive in a few days.
 
73 de BD6CR/4, Adam

On Mon, Oct 3, 2011 at 3:20 AM, mark <n8ibz@...> wrote:
 

Is the KN-Q10 still available?

73 Mark N8ibz



--- In CHINA_QRP@..., Xinhua Rong wrote:
>
> Hi all,
>
> The popular KN-Q7 is back! Now it is even better! We are introducing
> KN-Q7A, a new single band (now available in 40m band) SSB transceiver
> kit designed specifically for the worldwide market by BA6BF and provided
> by BD6CR/4. Improved design, select components, and lower price!
>
> *Key specification*

>
> Dimension: 153mm x 97mm x 40mm, not including protruding features
> Weight: 500g or 1.1 lbs
> Power Supply: 13.8V/ 3A
> Current consumption: 30mA in RX and about 2A in TX, measured at 13.8V
> RF output: about 10W PEP at 13.8V
> Sensitivity: better than 0.5uV at 10dB SNR
> IF filter: 6 pole + 1 pole crystal ladder filter
> IF bandwidth: about 2.5kHz
> IF frequency: 8.467MHz
> Frequency range: about 20kHz in super VXO type
> Connectors:
> Speaker output: 3.5mm connector, mono output
> Microphone input: 8-pin, can be configured to be compatible with
> electret microphones on hand
> Antenna connector: M type, rear panel mount
> Controls:
> IF Gain Control: act as volume control
> Tune Control
> On board RF Attenuator trimmer to eliminate broadcast interference
>
> *Main Improvement from KN-Q7*

>
> Improved LPF circuit to be tested to meet -43dB standard
> Added post IF AMP one pole crystal filter to reduce background noise
> Removed RX/TX indicator LED to even reduce RX current consumption by
> about 5mA (from 35mA to 30mA)
> Added one on-board RF attenuator in receiver front end to eliminate
> broadcast interference
> Added power polarity protection
> 25% bigger chassis area as heat sink to reduce thermal drift
> More frequency coverage including popular Europe frequency 7.090MHz or
> around, besides the original 7.050-7.070MHz coverage
> Matched IF filter crystals to ensure good selectivity
> Selected components to improve circuit stability and overall build
> experience
>
> *Price, payment and order*

>
> Introductory price from now to Oct 31, 2011 is 99 USD per kit, list
> price is 115 USD per kit from Nov 1, 2011. The time means the time of
> payment.
> Optional microphone is also offered at 20 USD if you buy along with the
> kit, or 25 USD if you buy separately.
> If you need the kit assembled and tested, 25 USD needs to be added and
> allow lead time of about one week.
> We are shipping directly from China to the worldwide by post office air
> parcel service. The shipping cost is 25 USD per kit for worldwide, and
> it will take about 7 to 21 days to arrive Asia, Europe, Oceania and
> North America, and a bit more time to arrive South America and Africa
> (varies by country).
> We only accept email order and can accept paypal payment, and our email
> and paypal account is rongxh(at)gmail.com, please replace (at) with @.
> Contact us by email if you prefer other way of payment. We provide full
> refund if you change your mind any time before the shipment.
> Please specify Europe or Asia frequency range when you order by email.
> We plan to ship the kit by the end of October or a bit earlier.
>
> *Notes*

>
> There is no full printed manual included in each kit to stay green. Only
> PDF format is offered online. Manual will be available by the time you
> get your kit.
> Product photos will be provided later in this yahoo group. First
> customer ship date will be notified as soon as available.
>
> 73 de BD6CR/4, Adam
>


Re: Introducing KN-Q7A single band SSB transceiver kit

Adam Rong
 

Hi Mark,
 
I need to order a new customized crystal for US general band, however, I haven't seen enough inquiry from US side to be able to balance what I need to pay for the crystal yet.
 
73 de BD6CR/4, Adam

On Mon, Oct 3, 2011 at 3:06 AM, mark <n8ibz@...> wrote:
 

What would it take to get this on the general bands here in the US. 7.175 to 7.300.

Thank you,

Mark Adams
N8ibz



--- In CHINA_QRP@..., Xinhua Rong wrote:
>
> Hi all,
>
> The popular KN-Q7 is back! Now it is even better! We are introducing
> KN-Q7A, a new single band (now available in 40m band) SSB transceiver
> kit designed specifically for the worldwide market by BA6BF and provided
> by BD6CR/4. Improved design, select components, and lower price!
>
> *Key specification*

>
> Dimension: 153mm x 97mm x 40mm, not including protruding features
> Weight: 500g or 1.1 lbs
> Power Supply: 13.8V/ 3A
> Current consumption: 30mA in RX and about 2A in TX, measured at 13.8V
> RF output: about 10W PEP at 13.8V
> Sensitivity: better than 0.5uV at 10dB SNR
> IF filter: 6 pole + 1 pole crystal ladder filter
> IF bandwidth: about 2.5kHz
> IF frequency: 8.467MHz
> Frequency range: about 20kHz in super VXO type
> Connectors:
> Speaker output: 3.5mm connector, mono output
> Microphone input: 8-pin, can be configured to be compatible with
> electret microphones on hand
> Antenna connector: M type, rear panel mount
> Controls:
> IF Gain Control: act as volume control
> Tune Control
> On board RF Attenuator trimmer to eliminate broadcast interference
>
> *Main Improvement from KN-Q7*

>
> Improved LPF circuit to be tested to meet -43dB standard
> Added post IF AMP one pole crystal filter to reduce background noise
> Removed RX/TX indicator LED to even reduce RX current consumption by
> about 5mA (from 35mA to 30mA)
> Added one on-board RF attenuator in receiver front end to eliminate
> broadcast interference
> Added power polarity protection
> 25% bigger chassis area as heat sink to reduce thermal drift
> More frequency coverage including popular Europe frequency 7.090MHz or
> around, besides the original 7.050-7.070MHz coverage
> Matched IF filter crystals to ensure good selectivity
> Selected components to improve circuit stability and overall build
> experience
>
> *Price, payment and order*

>
> Introductory price from now to Oct 31, 2011 is 99 USD per kit, list
> price is 115 USD per kit from Nov 1, 2011. The time means the time of
> payment.
> Optional microphone is also offered at 20 USD if you buy along with the
> kit, or 25 USD if you buy separately.
> If you need the kit assembled and tested, 25 USD needs to be added and
> allow lead time of about one week.
> We are shipping directly from China to the worldwide by post office air
> parcel service. The shipping cost is 25 USD per kit for worldwide, and
> it will take about 7 to 21 days to arrive Asia, Europe, Oceania and
> North America, and a bit more time to arrive South America and Africa
> (varies by country).
> We only accept email order and can accept paypal payment, and our email
> and paypal account is rongxh(at)gmail.com, please replace (at) with @.
> Contact us by email if you prefer other way of payment. We provide full
> refund if you change your mind any time before the shipment.
> Please specify Europe or Asia frequency range when you order by email.
> We plan to ship the kit by the end of October or a bit earlier.
>
> *Notes*

>
> There is no full printed manual included in each kit to stay green. Only
> PDF format is offered online. Manual will be available by the time you
> get your kit.
> Product photos will be provided later in this yahoo group. First
> customer ship date will be notified as soon as available.
>
> 73 de BD6CR/4, Adam
>


Re: Introducing KN-Q7A single band SSB transceiver kit

mark <n8ibz@...>
 

Is the KN-Q10 still available?

73 Mark N8ibz

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

Hi all,

The popular KN-Q7 is back! Now it is even better! We are introducing
KN-Q7A, a new single band (now available in 40m band) SSB transceiver
kit designed specifically for the worldwide market by BA6BF and provided
by BD6CR/4. Improved design, select components, and lower price!

*Key specification*

Dimension: 153mm x 97mm x 40mm, not including protruding features
Weight: 500g or 1.1 lbs
Power Supply: 13.8V/ 3A
Current consumption: 30mA in RX and about 2A in TX, measured at 13.8V
RF output: about 10W PEP at 13.8V
Sensitivity: better than 0.5uV at 10dB SNR
IF filter: 6 pole + 1 pole crystal ladder filter
IF bandwidth: about 2.5kHz
IF frequency: 8.467MHz
Frequency range: about 20kHz in super VXO type
Connectors:
Speaker output: 3.5mm connector, mono output
Microphone input: 8-pin, can be configured to be compatible with
electret microphones on hand
Antenna connector: M type, rear panel mount
Controls:
IF Gain Control: act as volume control
Tune Control
On board RF Attenuator trimmer to eliminate broadcast interference

*Main Improvement from KN-Q7*

Improved LPF circuit to be tested to meet -43dB standard
Added post IF AMP one pole crystal filter to reduce background noise
Removed RX/TX indicator LED to even reduce RX current consumption by
about 5mA (from 35mA to 30mA)
Added one on-board RF attenuator in receiver front end to eliminate
broadcast interference
Added power polarity protection
25% bigger chassis area as heat sink to reduce thermal drift
More frequency coverage including popular Europe frequency 7.090MHz or
around, besides the original 7.050-7.070MHz coverage
Matched IF filter crystals to ensure good selectivity
Selected components to improve circuit stability and overall build
experience

*Price, payment and order*

Introductory price from now to Oct 31, 2011 is 99 USD per kit, list
price is 115 USD per kit from Nov 1, 2011. The time means the time of
payment.
Optional microphone is also offered at 20 USD if you buy along with the
kit, or 25 USD if you buy separately.
If you need the kit assembled and tested, 25 USD needs to be added and
allow lead time of about one week.
We are shipping directly from China to the worldwide by post office air
parcel service. The shipping cost is 25 USD per kit for worldwide, and
it will take about 7 to 21 days to arrive Asia, Europe, Oceania and
North America, and a bit more time to arrive South America and Africa
(varies by country).
We only accept email order and can accept paypal payment, and our email
and paypal account is rongxh(at)gmail.com, please replace (at) with @.
Contact us by email if you prefer other way of payment. We provide full
refund if you change your mind any time before the shipment.
Please specify Europe or Asia frequency range when you order by email.
We plan to ship the kit by the end of October or a bit earlier.

*Notes*

There is no full printed manual included in each kit to stay green. Only
PDF format is offered online. Manual will be available by the time you
get your kit.
Product photos will be provided later in this yahoo group. First
customer ship date will be notified as soon as available.

73 de BD6CR/4, Adam

Re: Introducing KN-Q7A single band SSB transceiver kit

mark <n8ibz@...>
 

What would it take to get this on the general bands here in the US. 7.175 to 7.300.

Thank you,

Mark Adams
N8ibz

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

Hi all,

The popular KN-Q7 is back! Now it is even better! We are introducing
KN-Q7A, a new single band (now available in 40m band) SSB transceiver
kit designed specifically for the worldwide market by BA6BF and provided
by BD6CR/4. Improved design, select components, and lower price!

*Key specification*

Dimension: 153mm x 97mm x 40mm, not including protruding features
Weight: 500g or 1.1 lbs
Power Supply: 13.8V/ 3A
Current consumption: 30mA in RX and about 2A in TX, measured at 13.8V
RF output: about 10W PEP at 13.8V
Sensitivity: better than 0.5uV at 10dB SNR
IF filter: 6 pole + 1 pole crystal ladder filter
IF bandwidth: about 2.5kHz
IF frequency: 8.467MHz
Frequency range: about 20kHz in super VXO type
Connectors:
Speaker output: 3.5mm connector, mono output
Microphone input: 8-pin, can be configured to be compatible with
electret microphones on hand
Antenna connector: M type, rear panel mount
Controls:
IF Gain Control: act as volume control
Tune Control
On board RF Attenuator trimmer to eliminate broadcast interference

*Main Improvement from KN-Q7*

Improved LPF circuit to be tested to meet -43dB standard
Added post IF AMP one pole crystal filter to reduce background noise
Removed RX/TX indicator LED to even reduce RX current consumption by
about 5mA (from 35mA to 30mA)
Added one on-board RF attenuator in receiver front end to eliminate
broadcast interference
Added power polarity protection
25% bigger chassis area as heat sink to reduce thermal drift
More frequency coverage including popular Europe frequency 7.090MHz or
around, besides the original 7.050-7.070MHz coverage
Matched IF filter crystals to ensure good selectivity
Selected components to improve circuit stability and overall build
experience

*Price, payment and order*

Introductory price from now to Oct 31, 2011 is 99 USD per kit, list
price is 115 USD per kit from Nov 1, 2011. The time means the time of
payment.
Optional microphone is also offered at 20 USD if you buy along with the
kit, or 25 USD if you buy separately.
If you need the kit assembled and tested, 25 USD needs to be added and
allow lead time of about one week.
We are shipping directly from China to the worldwide by post office air
parcel service. The shipping cost is 25 USD per kit for worldwide, and
it will take about 7 to 21 days to arrive Asia, Europe, Oceania and
North America, and a bit more time to arrive South America and Africa
(varies by country).
We only accept email order and can accept paypal payment, and our email
and paypal account is rongxh(at)gmail.com, please replace (at) with @.
Contact us by email if you prefer other way of payment. We provide full
refund if you change your mind any time before the shipment.
Please specify Europe or Asia frequency range when you order by email.
We plan to ship the kit by the end of October or a bit earlier.

*Notes*

There is no full printed manual included in each kit to stay green. Only
PDF format is offered online. Manual will be available by the time you
get your kit.
Product photos will be provided later in this yahoo group. First
customer ship date will be notified as soon as available.

73 de BD6CR/4, Adam

Introducing KN-Q7A single band SSB transceiver kit

Adam Rong
 

Hi all,

The popular KN-Q7 is back! Now it is even better! We are introducing KN-Q7A, a new single band (now available in 40m band) SSB transceiver kit designed specifically for the worldwide market by BA6BF and provided by BD6CR/4. Improved design, select components, and lower price!

Key specification

Dimension: 153mm x 97mm x 40mm, not including protruding features
Weight: 500g or 1.1 lbs
Power Supply: 13.8V/ 3A
Current consumption: 30mA in RX and about 2A in TX, measured at 13.8V
RF output: about 10W PEP at 13.8V
Sensitivity: better than 0.5uV at 10dB SNR
IF filter: 6 pole + 1 pole crystal ladder filter
IF bandwidth: about 2.5kHz
IF frequency: 8.467MHz
Frequency range: about 20kHz in super VXO type
Connectors:
    Speaker output: 3.5mm connector, mono output
    Microphone input: 8-pin, can be configured to be compatible with electret microphones on hand
    Antenna connector: M type, rear panel mount
Controls:
    IF Gain Control: act as volume control
    Tune Control
    On board RF Attenuator trimmer to eliminate broadcast interference

Main Improvement from KN-Q7

Improved LPF circuit to be tested to meet -43dB standard
Added post IF AMP one pole crystal filter to reduce background noise
Removed RX/TX indicator LED to even reduce RX current consumption by about 5mA (from 35mA to 30mA)
Added one on-board RF attenuator in receiver front end to eliminate broadcast interference
Added power polarity protection
25% bigger chassis area as heat sink to reduce thermal drift
More frequency coverage including popular Europe frequency 7.090MHz or around, besides the original 7.050-7.070MHz coverage
Matched IF filter crystals to ensure good selectivity
Selected components to improve circuit stability and overall build experience

Price, payment and order

Introductory price from now to Oct 31, 2011 is 99 USD per kit, list price is 115 USD per kit from Nov 1, 2011. The time means the time of payment.
Optional microphone is also offered at 20 USD if you buy along with the kit, or 25 USD if you buy separately.
If you need the kit assembled and tested, 25 USD needs to be added and allow lead time of about one week.
We are shipping directly from China to the worldwide by post office air parcel service. The shipping cost is 25 USD per kit for worldwide, and it will take about 7 to 21 days to arrive Asia, Europe, Oceania and North America, and a bit more time to arrive South America and Africa (varies by country).
We only accept email order and can accept paypal payment, and our email and paypal account is rongxh(at)gmail.com, please replace (at) with @. Contact us by email if you prefer other way of payment. We provide full refund if you change your mind any time before the shipment.
Please specify Europe or Asia frequency range when you order by email.
We plan to ship the kit by the end of October or a bit earlier.

Notes

There is no full printed manual included in each kit to stay green. Only PDF format is offered online. Manual will be available by the time you get your kit.
Product photos will be provided later in this yahoo group. First customer ship date will be notified as soon as available.

73 de BD6CR/4, Adam

Re: Notes for 2nd batch KN-Q10A kits

Adam Rong
 

Hi,

I just found one thing: You don't have to rework the rotary encoder any more, since it is reworked already.

73 de BD6CR/4, Adam

On 2011-9-19 20:13, Xinhua Rong wrote:
Notes for 2nd batch KN-Q10A kits

1. Check the SMD parts on the boards first. It is recommended that you have a magnifying glass to help you. Check if there is any solder bridges or cold soldering for each SMD IC on board. And check if there is any cracked capacitor. If you find any cracked capacitor, please replace it with new capacitor in the kit. We have checked the SMD parts soldering here, but it may cause additional issues during the shipment, so double check is highly recommended.

2. Parts kitting is different. We have put hard to distinguish parts into different bags, so please don't pour them together during your parts inventory. We have offered some spare parts, and also removed some unnecessary spare parts, however, the part list dated 6/28 is still useful.

3. Toroid coils are pre-wound, but they are not tinned, so please tin them before soldering. If necessary, you will need to remove the oxide layer before you tin the wire ends.

4. MCU IC socket was pre-soldered, and MCU was plugged in to avoid bent pins, but it is recommended that you carefully pull the MCU out from the socket first, to avoid possible damage during your board assembly.

73 de BD6CR/4, Adam

KN-Q7A Prototype Picture

Adam Rong
 

Hi all,

You might be interested to see the picture of the early prototype of KN-Q7A under development, and here it is. The front panel and rear panel will be black in the production. Other than that, the prototype is very near to production level now.

We have finalized the prototype build and test, and will release the production gerber very soon. All components but Europe crystals are ready for kitting, so it is expected that KN-Q7A kit will be ready for launch in the mid or late October, as planned.

73 de BD6CR/4, Adam

KN-Q10A Schematic Published

Adam Rong
 

Hi All,

I know you have been waiting for the schematic for KN-Q10A, so here it is:
http://www.qsl.net/bd6cr/Q10ASCH.pdf

73 de BD6CR/4, Adam

Notes for 2nd batch KN-Q10A kits

Adam Rong
 

Notes for 2nd batch KN-Q10A kits

1. Check the SMD parts on the boards first. It is recommended that you have a magnifying glass to help you. Check if there is any solder bridges or cold soldering for each SMD IC on board. And check if there is any cracked capacitor. If you find any cracked capacitor, please replace it with new capacitor in the kit. We have checked the SMD parts soldering here, but it may cause additional issues during the shipment, so double check is highly recommended.

2. Parts kitting is different. We have put hard to distinguish parts into different bags, so please don't pour them together during your parts inventory. We have offered some spare parts, and also removed some unnecessary spare parts, however, the part list dated 6/28 is still useful.

3. Toroid coils are pre-wound, but they are not tinned, so please tin them before soldering. If necessary, you will need to remove the oxide layer before you tin the wire ends.

4. MCU IC socket was pre-soldered, and MCU was plugged in to avoid bent pins, but it is recommended that you carefully pull the MCU out from the socket first, to avoid possible damage during your board assembly.

73 de BD6CR/4, Adam

Re: NEW KN-Q7A

Adam Rong
 

Thank you for the support. I will let you know when it is orderable.

I have good news for everyone. The first KN-Q7A was on air tonight by BA6BF. The RX sensitive is about 0.5uV at 10dB S/N. RX overall current is 28mA. RF output is a bit more than 10W at 13.8V, and overall current is about 2.05A. At 12V, RF output is about 8W, and overall current is about 1.8A. Both RX and TX audio is good.

73 de BD6CR/4, Adam

On 2011-9-16 21:51, HAKAN wrote:
 

Hi Adam,

I will ask 2 KN-Q7A Kits for me to delivery in Shangai as previously done:)

Regards and 73's de TA2LJ Hakan

--- In CHINA_QRP@..., Xinhua Rong wrote:
>
> Hi Hakan,
>
> Thanks for the feedback. Before we get more feedback, we will ship KN-Q7A
> with frequency range of about 7050~7070 for your build and test purpose,
> since customizing a new crystal will cost money and time. It is not
> realistic to customize for every requirement, so we will carefully consider
> what is the next frequency range.
>
> BTW, KN-Q7A schedule is very good so far. We will get prototype PCB
> tomorrow, and trial build will start shortly. The best case schedule is that
> we can get production PCB by the end of this month, but it totally depends
> on whether it goes smoothly in prototype build.
>
> Also, I have observed that the first wave of customers come from this group,
> and I really appreciate your great support over the time. I plan to sell
> KN-Q7A with rebate of 15 USD in the first month of launch. If the final
> price is 125 USD, you get 110 USD price in the first month. The final price
> is still to be determined.
>
> 73 de BD6CR/4, Adam
>
> On Fri, Sep 9, 2011 at 2:24 AM, HAKAN GUNER wrote:
>
> > **
> >
> >
> > Hi Adam,
> >
> > good to hear about KN-Q7A. For the covarage in 40 m, we mostly use the
> > upper part such as 7092 kHz for meeting freq. I advise you can consider new
> > band planining up to 7200 Khz in Europe.
> >
> > 73's de TA2LJ Hakan
> >
> >
> >
>


NEW KN-Q7A

HAKAN GUNER
 

Hi Adam,

I will ask 2 KN-Q7A Kits for me to delivery in Shangai as previously done:)

Regards and 73's de TA2LJ Hakan

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

Hi Hakan,

Thanks for the feedback. Before we get more feedback, we will ship KN-Q7A
with frequency range of about 7050~7070 for your build and test purpose,
since customizing a new crystal will cost money and time. It is not
realistic to customize for every requirement, so we will carefully consider
what is the next frequency range.

BTW, KN-Q7A schedule is very good so far. We will get prototype PCB
tomorrow, and trial build will start shortly. The best case schedule is that
we can get production PCB by the end of this month, but it totally depends
on whether it goes smoothly in prototype build.

Also, I have observed that the first wave of customers come from this group,
and I really appreciate your great support over the time. I plan to sell
KN-Q7A with rebate of 15 USD in the first month of launch. If the final
price is 125 USD, you get 110 USD price in the first month. The final price
is still to be determined.

73 de BD6CR/4, Adam

On Fri, Sep 9, 2011 at 2:24 AM, HAKAN GUNER <ta2lj@...> wrote:

**


Hi Adam,

good to hear about KN-Q7A. For the covarage in 40 m, we mostly use the
upper part such as 7092 kHz for meeting freq. I advise you can consider new
band planining up to 7200 Khz in Europe.

73's de TA2LJ Hakan


KN-Q7A Europe Frequency 7.090MHz Around Possible

Adam Rong
 

Hi all,
 
Thanks to the feedback from Europe. I understand 7.090 around is very hot SSB frequency in Europe. Over the past several days, I have been sourcing of a new VXO crystal specially for Europe and I am almost there, although MOQ and unit cost are still too high for me since it is a total customization for me. The new crystal is 15.570MHz, 49U holder, and I hope it can cover around 7080~7100kHz. The original KN-Q7A VXO crystal is 15.360MHz, 49S holder and it can cover around 7050~7070kHz for China and region 3, and we also plan to offer along for worldwide market. Thanks to Ms. Chen from KSH for her great support.
 
Status Update
 
I got the prototype PCB yesterday and spent some time to solder almost all the components on the board, and today I will ship the board to the designer BA6BF to fully populate the board and do smoke test and some fine tuning for components value. If everything goes well, the first KN-Q7A will be on the air in this weekend.
 
Regarding the launch date, I believe it is most likely in the mid or late October, since we have one week holiday from Oct 1 to Oct 7 here in China. The critical parts are the Europe crystal, final PCB and chassis.
 
What's new in KN-Q7A?
 
1. RF ATT trimmer is added to avoid broadcast interference, especially in night time. Although you cannot easily access to the trimmer from the panel, it does help you when you have BCI problem.
2. Post IF AMP filter is planned so it will reduce some noise hopefully.
3. IF filter and LPF filter minor modification to improve performance.
4. Slightly bigger chassis will allow better thermal capability and hopefully it will reduce frequency drift a little bit.
5. For those people who does not like SMD parts, we changed SMD NE602 to DIP type, so the only SMD part will be C3357, a SOT-89 3pin part, should be a piece of cake for anyone.
6. Change mic connector from 4 pin to 8 pin and offer optional microphone along.
7. And, Europe hot frequency coverage!
 
Stay tuned and I will keep you updated.
 
73 de BD6CR/4, Adam

Re: (unknown)

Adam Rong
 

Hi Hakan,
 
Thanks for the feedback. Before we get more feedback, we will ship KN-Q7A with frequency range of about 7050~7070 for your build and test purpose, since customizing a new crystal will cost money and time. It is not realistic to customize for every requirement, so we will carefully consider what is the next frequency range.
 
BTW, KN-Q7A schedule is very good so far. We will get prototype PCB tomorrow, and trial build will start shortly. The best case schedule is that we can get production PCB by the end of this month, but it totally depends on whether it goes smoothly in prototype build.
 
Also, I have observed that the first wave of customers come from this group, and I really appreciate your great support over the time. I plan to sell KN-Q7A with rebate of 15 USD in the first month of launch. If the final price is 125 USD, you get 110 USD price in the first month. The final price is still to be determined.
 
73 de BD6CR/4, Adam

On Fri, Sep 9, 2011 at 2:24 AM, HAKAN GUNER <ta2lj@...> wrote:
 

Hi Adam,
 
good to hear about KN-Q7A. For the covarage in 40 m, we mostly use the upper part such as 7092 kHz for meeting freq. I advise you can consider new band planining up to 7200 Khz in Europe.
 
73's de TA2LJ Hakan


Re: KNQ10 (sort of) fixed, more help needed

Adam Rong
 

Hi Jon,

Is the MOSFET marked V11? The RF output is quite sensitive with power supply voltage, so if you can supply with 13.8V, you can get much higher power I believe. Another hint is that you need to tune VCO output for each band by tuning the trimmers on the digital board. If you have done so, please forget it.

The reason why I am talking about these, is that your RF output is still lower than expected, so even you replace D882 with C1971 or C2166, you still cannot get enough power you want. C2166 should help but the pinout is reversed with D882, so you need to study how to solder them very carefully.

73 de BD6CR/4, Adam

On 2011-9-12 1:25, iapizloj wrote:
 

Folks,
it turned out that a MOSFET was wrongly placed. Once fixed I am able to get (at 12.0 V) about 7 W on 80, 2 W on 40, 1 W on 20 and 60 mW on 15 meter. I have read that there is a mod for the KN-Q10A, replacing the audio transistor 2SD822 with a 2SD1971 for a higher gain at higher frequencies, in order to fix low power at 21 MHz.
The 2SC1971 is a VHF (175 MHz) transistor with 10 dB gain and 6 W output power. I can get locally 2SC2166, which are HF (30 MHz) transistors with a higher gain (13.8 dB) and same power, 6 W.
Is the Ft characteristic something essential for this application?
Maybe somebody has a good advice on this. Any hints appreciated.
jon, ea2sn


KNQ10 (sort of) fixed, more help needed

Jon EA2SN
 

Folks,
it turned out that a MOSFET was wrongly placed. Once fixed I am able to get (at 12.0 V) about 7 W on 80, 2 W on 40, 1 W on 20 and 60 mW on 15 meter. I have read that there is a mod for the KN-Q10A, replacing the audio transistor 2SD822 with a 2SD1971 for a higher gain at higher frequencies, in order to fix low power at 21 MHz.
The 2SC1971 is a VHF (175 MHz) transistor with 10 dB gain and 6 W output power. I can get locally 2SC2166, which are HF (30 MHz) transistors with a higher gain (13.8 dB) and same power, 6 W.
Is the Ft characteristic something essential for this application?
Maybe somebody has a good advice on this. Any hints appreciated.
jon, ea2sn

(No subject)

HAKAN GUNER
 

Hi Adam,
 
good to hear about KN-Q7A. For the covarage in 40 m, we mostly use the upper part such as 7092 kHz for meeting freq. I advise you can consider new band planining up to 7200 Khz in Europe.
 
73's de TA2LJ Hakan

Re: KNQ10 help needed

Adam Rong
 

Hi Jon,
 
If you have access to signal generator, you can try to inject a signal to the output of DBM and see if the diode switches and BPF are ok. For some reason, sometimes the circuit diagram is different from the PCB, but it should be easy to understand the theory of operation. For your issue, I would suggest you check band switch signal, 12VT signals on both ends of BPF, and check if the 1:1 transformer is ok. Once you confirm they are ok, you can check the PA board, or you can confirm PA board by injecting signal to the input.
 
73 de BD6CR/4, Adam


 

On Thu, Sep 8, 2011 at 3:42 PM, iapizloj <jon.iza@...> wrote:
 

Folks,
As I have a problem with the TX not producing any output, I have dedicated several hours now to figure out what is what and where it is on the PCBs using the schematics. I have been looking for KN/Q10A schematics, just in case they are a bit better than the ones on the Files section for the KN-Q10, but no cigar.
I am able to produce DSB on the 4.43 mixer, get SSB on the other side of the filter and plenty of mixing products after the DBM. When I get to the passband filters, I have 12VR and 12VT BUT the schematics on the side of the transformer going to the PA does not fit with what I have on my PCB. It looks like the isolating cap is connecting one leg to ground, and both legs of the transformer are at 0.7 V when 12VT is applied. Is that right?
Even though I have peaked all passband filters using a RF generator on RX, I cannot get even a pip while transmitting.
Any hint?
jon, ea2sn


KNQ10 help needed

Jon EA2SN
 

Folks,
As I have a problem with the TX not producing any output, I have dedicated several hours now to figure out what is what and where it is on the PCBs using the schematics. I have been looking for KN/Q10A schematics, just in case they are a bit better than the ones on the Files section for the KN-Q10, but no cigar.
I am able to produce DSB on the 4.43 mixer, get SSB on the other side of the filter and plenty of mixing products after the DBM. When I get to the passband filters, I have 12VR and 12VT BUT the schematics on the side of the transformer going to the PA does not fit with what I have on my PCB. It looks like the isolating cap is connecting one leg to ground, and both legs of the transformer are at 0.7 V when 12VT is applied. Is that right?
Even though I have peaked all passband filters using a RF generator on RX, I cannot get even a pip while transmitting.
Any hint?
jon, ea2sn