Date   
Re: Still remember KN-Q7A?

Timothy Fidler
 

Norm I have sent an email to AR suggesting  a small PCB with the xtals mounted and a diode switch arrangement  (that would add cost of Rotary switch too to the box of bits).  THere is no chance he will offer his sandwich VFO as this would drive the price out of the water.  I also suggested a source of MC 1350 although he has local access to UTSource.   THere is too the option of switching in  an extra capacitor in the BPF chain and making it a 40/20 Rx which is then starting to build up some momentum. 
That however might mean a switched xtal filter unit too if one wanted the simplicity of a pulled LO.

as for freq display -  have a look at Kits and Parts in USa he sells a CW tcvr and recommends an LCD display that is fully buiilt up  (clearly he cannot compete).  Price is about USD $13 ex PRC.

Also there is an LED version that sells in the US as a six digit display (and appears to have preamp) . Typical US price is $13 which is about $20 AUD plus transit . PM me and I can give you the address on FL (bricks and mortar place )> Adam would have option of buying one or other in and offering it as an extra.  He would likely be able to offer it at the same price as you would pay in the West.    TEF

Re: HT-1A videos uploaded

Faisal Akber (VA3SFA)
 

I didn't make a video but yesterday I took the HT -1A out to a park and had a great time listening to SSB on both 20m and 40m from CM97.

Maybe next time I will record the outing and post it on Youtube. 

72,
Faisal VA3SFA

From: Timothy Fidler
Sent: Monday, September 17, 2018 04:33
To: crkits@groups.io
Reply To: crkits@groups.io
Subject: Re: [crkits] HT-1A videos uploaded

It would be really nice to have a video from an English speaking country,,,, I include America there, showing how the HT1A performs in SSB listening mode. Some CW tcvrs are find for this but others like the one from Hans Summers simply cannot do it because of the architecture.  FW it is worth. ..there must be something on Ytube but mostly it is older models...

Re: Still remember KN-Q7A?

Larry Lovell
 

I have a modification that will work with both the KN-Q7A and the CS-Series radio.  I have a PC board that puts all of the Sandwich on a single board except of course the Arduino.  It has an OLED display to display the frequency you are on and will allow you to program LSB or USB as well while receiving a signal.  It will plug into the radio and has it's own faceplate as well.  http://www.qrvtronics.com/CatHAM_Radio/HAM_Display_Options.htm.  Software is included with the kit.
I am working on a multi-band option that will work as well, 80, 40, 20, 17 and 15 Meters.
Larry

Re: Still remember KN-Q7A?

Adam Rong
 

John,

The propagation is very poor indeed because of the spotless sun. You will hear more signals here in Asia, Australia and also Europe in the range of 7.050-7.130, especially in night time.

Thanks,
Adam

在 2018年9月16日,下午11:21,JOHN CRONHELM <johncronhelm@...> 写道:

Adam,
I have heard nothing except band noise on my KN-Q7A from 7.050-7.130 since mid November 2017, but very occasionally further up the band on my main transceiver and antenna. Bottom of cycle has really hit this area Newfoundland. 20 mtrs is dead.
John vo1jcc.


Sent from Yahoo Mail for iPad

On Sunday, September 16, 2018, 10:25 AM, Adam Rong <rongxh@...> wrote:

Gang,

I listen a lot but seldom transmit. Although I have a few radios to choose from, I still wish to build a dedicated receiver. I hope it is low noise and high performance, so I consider KN-Q7A receiver portion. By using four crystals in crystal socket, I can tune 7.000-7.030 for CW, 7.050-7.130 for SSB. I added a power switch and power indicator LED and power consumption is about 35 mA.

I have depleted MC1350 so I believe for a while it is not possible to produce more CS kits, but I have an alternative solution and it works fine. Some redesign is required, so let’s wait for some time. 
<WechatIMG3.jpeg>
Thanks,
Adam
<WechatIMG3.jpeg>

Re: Still remember KN-Q7A?

Adam Rong
 

Norm,

Thanks for the suggestions. For now, I just use crystals on hand to make a receiver for fun. I just get tired of the modern digital processing radios. I just need an analog radio with low power consumption.

Speaking of the receiver, I did have another one with 4 crystals and 39pF for IF filter and 2N3904 in the place of MC1350. The sensitivity and selectivity are both okay and I believe the noise pattern and audio is more favorable to me. Probably I will build another one to make sure it will work that way and make a simple receiver kit at low cost. This kind of receiver kit will be the platform for hams to experiment. You can add transmitter circuit by yourself, or add multiple band options, or display options etc. You have enough room and you just pay less for the platform.

Thanks,
Adam

在 2018年9月17日,下午3:25,marjannorm <marjannorm@...> 写道:

Hi Adam. The KN-Q7A is a very good rig indeed, no doubt about that. If you are designing a receiver from scratch on 40m, then 7.000 through to 7.150 at least is a must, because Parks on the Air, SOTA, and other portable operations use 7.140 through to .150. And - AND, then there is the CW qrp operations at the lower end of the band. The LED tuning is ok, and gets around a problem, but a small LCD display smaller that the usual 16x2 would be a real advantage.
Just my thoughts. Keep up the good work
Norm vk5gi
McLaren Vale
South Australia


Re: HT-1A videos uploaded

Adam Rong
 

Faisal,

Looking forward to more videos about HT-1A. Besides Japan, only a dozen people own HT-1A. As a proud owner, please share the videos if you like it.

Thanks,
Adam

Re: Still remember KN-Q7A?

JOHN CRONHELM
 

Hi Larry,
With this PCB would I still have to remove parts from my existing KN-Q7A to get Oled to work.
Unfortunately have still not heard any stations,even though band noise is normal. This is because of 
very poor propagation at bottom of Sun Spot cycle. Plus a lot of Auroral absorption of signals here in the north. We'll see what happens after the Autumnal Equinox at the end of September.

On Monday, September 17, 2018, 1:38 PM, Larry Lovell <n7rgw@...> wrote:

I have a modification that will work with both the KN-Q7A and the CS-Series radio.  I have a PC board that puts all of the Sandwich on a single board except of course the Arduino.  It has an OLED display to display the frequency you are on and will allow you to program LSB or USB as well while receiving a signal.  It will plug into the radio and has it's own faceplate as well.  http://www.qrvtronics.com/CatHAM_Radio/HAM_Display_Options.htm.  Software is included with the kit.
I am working on a multi-band option that will work as well, 80, 40, 20, 17 and 15 Meters.
Larry

Re: Still remember KN-Q7A?

ajparent1/kb1gmx <kb1gmx@...>
 

I have one I still use as crystal controlled.  It cover the 7.140- to 7.180 segment
using a real variable capacitor and the toroid for the inductor.

If you not hearing anything on 40 check your antenna, it may be on the ground.
The band was bad last week due to solar wind causing geomagnetic storm
but I worked a few people then and before that.

Mine gets used fairly regular.   I thought about adding a DDS for greater coverage 
but I have Argonaut 505 and FT817 for that.  I did add agc and alc.

Allison

Re: Still remember KN-Q7A?

Adam Rong
 

I made another receiver and posted a comparison audio file to a forum. People  prefer my radio instead of my TS-940. A lot of fun! The way to replace MC1350 will cause more changes on GAIN control. Some additional wiring will be required.

Thanks
Adam

在 2018年9月18日,上午12:53,Adam Rong <rongxh@...> 写道:

Norm,

Thanks for the suggestions. For now, I just use crystals on hand to make a receiver for fun. I just get tired of the modern digital processing radios. I just need an analog radio with low power consumption.

Speaking of the receiver, I did have another one with 4 crystals and 39pF for IF filter and 2N3904 in the place of MC1350. The sensitivity and selectivity are both okay and I believe the noise pattern and audio is more favorable to me. Probably I will build another one to make sure it will work that way and make a simple receiver kit at low cost. This kind of receiver kit will be the platform for hams to experiment. You can add transmitter circuit by yourself, or add multiple band options, or display options etc. You have enough room and you just pay less for the platform.

Thanks,
Adam

在 2018年9月17日,下午3:25,marjannorm <marjannorm@...> 写道:

Hi Adam.   The KN-Q7A is a very good rig indeed, no doubt about that.   If you are designing a receiver from scratch on 40m, then 7.000 through to 7.150 at least is a must, because Parks on the Air, SOTA, and other portable operations use 7.140 through to .150.    And - AND, then there is the CW qrp operations at the lower end of the band.   The LED tuning is ok, and gets around a problem, but a small LCD display smaller that the usual 16x2 would be a real advantage.
Just my thoughts.  Keep up the good work
Norm vk5gi
McLaren Vale
South Australia






Re: Still remember KN-Q7A?

Adam Rong
 

And here is the photo.
image1.jpeg
And the spectrum.
image2.jpeg
Thanks,
Adam

在 2018年9月20日,上午1:05,Adam Rong <rongxh@...> 写道:

I made another receiver and posted a comparison audio file to a forum. People  prefer my radio instead of my TS-940. A lot of fun! The way to replace MC1350 will cause more changes on GAIN control. Some additional wiring will be required.

Thanks
Adam

在 2018年9月18日,上午12:53,Adam Rong <rongxh@...> 写道:

Norm,

Thanks for the suggestions. For now, I just use crystals on hand to make a receiver for fun. I just get tired of the modern digital processing radios. I just need an analog radio with low power consumption.

Speaking of the receiver, I did have another one with 4 crystals and 39pF for IF filter and 2N3904 in the place of MC1350. The sensitivity and selectivity are both okay and I believe the noise pattern and audio is more favorable to me. Probably I will build another one to make sure it will work that way and make a simple receiver kit at low cost. This kind of receiver kit will be the platform for hams to experiment. You can add transmitter circuit by yourself, or add multiple band options, or display options etc. You have enough room and you just pay less for the platform.

Thanks,
Adam

在 2018年9月17日,下午3:25,marjannorm <marjannorm@...> 写道:

Hi Adam.   The KN-Q7A is a very good rig indeed, no doubt about that.   If you are designing a receiver from scratch on 40m, then 7.000 through to 7.150 at least is a must, because Parks on the Air, SOTA, and other portable operations use 7.140 through to .150.    And - AND, then there is the CW qrp operations at the lower end of the band.   The LED tuning is ok, and gets around a problem, but a small LCD display smaller that the usual 16x2 would be a real advantage.
Just my thoughts.  Keep up the good work
Norm vk5gi
McLaren Vale
South Australia






PA0RDT mini whip on Choc board

Adam Rong
 

Gang,

My friend BA4EO asked me to make a mini whip for his Long Wave RX, and I made in 2 hours. It is actually a two stage amplifier including J310 and 2N5109. The antenna plate is also made by Choc board, hihi. It performs quite well.




Thanks,
Adam

Re: HT-1A videos uploaded

mx6s@...
 

Fisal, Timothy, Adam and All,

Though this is not in English, HT-1A SSB sound is uploaded to the Youtube.
I tuned around domestic contest CQ.

https://www.youtube.com/watch?time_continue=1&v=q-EwkvYKK5I

As I listened to the HT-1A in LSB mode, tone is mild and enjoyable to hear long time.
Boat anchor AM stations and real BC stations are sounds nice too except music program.

Thank you.

Junichi JL1KRA

Re: PA0RDT mini whip on Choc board

Adam Rong
 

Gang,

I made some changes to the mini whip to keep the 2nd stage 2N5109 amplifier and add a relay to switch my end feed half wave antenna, so I now have two antennas, with and without amplifier. I connected to two connectors on my TS-590S and switch them. The amplifier works great for the non-resonant bands, especially for Long Wave and Medium Wave bands and 6 meter band. The added amplifier will not cause noticeable overload to receiver front end due to the big current of more than 30 mA. What makes me happy, is that the Choc perf board works great again with the modified circuit! Enjoy the photo.

Thanks,
Adam

Re: PA0RDT mini whip on Choc board

Adam Rong
 

It seems that the photo did not show correctly. Here it is.
image1.jpeg

Thanks,
Adam

在 2018年9月29日,下午11:19,Adam Rong <rongxh@...> 写道:

Gang,

I made some changes to the mini whip to keep the 2nd stage 2N5109 amplifier and add a relay to switch my end feed half wave antenna, so I now have two antennas, with and without amplifier. I connected to two connectors on my TS-590S and switch them. The amplifier works great for the non-resonant bands, especially for Long Wave and Medium Wave bands and 6 meter band. The added amplifier will not cause noticeable overload to receiver front end due to the big current of more than 30 mA. What makes me happy, is that the Choc perf board works great again with the modified circuit! Enjoy the photo.

Thanks,
Adam

Re: Year end big promotions

Adam Rong
 

Gang,

I plan to clean out some items of my stock so I have the following additional discount (still free shipping but 10% off for 2nd purchase will not apply) available until the end of this year.

R3500D assembled ARDF receiver for 3500-3600 kHz 32 USD each
PJ-2D assembled ARDF receiver for 2 meter band 90 USD each (2 pcs remaining)
CRK-10A CW transceiver 35 USD each
Sandwich digital VFO 15 USD each
HT-1A kit 125 USD each
HT-1A assembled radio 150 USD each
10 pcs Choc perf board 20 USD each
DIY7 series coils (3.8, 7, 14, 21) 1 USD each

Email order will be accepted. I can send invoice through PayPal so you can pay with credit card via PayPal.

Thanks,
Adam

在 2018年9月11日,上午9:58,Adam Rong <rongxh@...> 写道:

Gang,

This is the 7th year of my kit business. Starting from October 1 (shipping date) till the end of this year, I will offer discount as follows:

1. All products on http://crkits.com will be free shipping to worldwide.
2. If you buy the second pcs of a product, you get 10% off. So invite your friend to buy along so both of you can get 5% off.
3. You can place orders now to qualify the above discount if you accept shipping later than Oct 1.

Thanks,
Adam

Re: Year end big promotions

Cues Ahero
 

Hi,would like a crk10 and 2 sandwich vfo,s if available. Paypal invoice cool.thanks,wr6s


On Wed, Oct 3, 2018, 5:04 PM Adam Rong <rongxh@...> wrote:
Gang,

I plan to clean out some items of my stock so I have the following additional discount (still free shipping but 10% off for 2nd purchase will not apply) available until the end of this year.

R3500D assembled ARDF receiver for 3500-3600 kHz  32 USD each
PJ-2D assembled ARDF receiver for 2 meter band  90 USD each (2 pcs remaining)
CRK-10A CW transceiver  35 USD each
Sandwich digital VFO  15 USD each
HT-1A kit 125 USD each
HT-1A assembled radio 150 USD each
10 pcs Choc perf board  20 USD each
DIY7 series coils (3.8, 7, 14, 21) 1 USD each

Email order will be accepted. I can send invoice through PayPal so you can pay with credit card via PayPal.

Thanks,
Adam

> 在 2018年9月11日,上午9:58,Adam Rong <rongxh@...> 写道:
>
> Gang,
>
> This is the 7th year of my kit business. Starting from October 1 (shipping date) till the end of this year, I will offer discount as follows:
>
> 1. All products on http://crkits.com will be free shipping to worldwide.
> 2. If you buy the second pcs of a product, you get 10% off. So invite your friend to buy along so both of you can get 5% off.
> 3. You can place orders now to qualify the above discount if you accept shipping later than Oct 1.
>
> Thanks,
> Adam
>
>



Re: Year end big promotions

Adam Rong
 

Hi WR6S,

I have sent the invoice.

Guys,

Please contact offline by email rongxh@...

Thanks,
Adam

HT-1A SOTA video

Adam Rong
 

https://www.youtube.com/watch?v=47a-cXd_PIY&feature=youtu.be

FB SOTA video from Japan but you can see English.

Thanks,
Adam

Tiny Toy Receiver

Adam Rong
 

Gang,

Here I show you my recent project.

Inspired by the receiver portion of VK3YE’s tiny toy CW transceiver (search YouTube videos to know more about this radio), I wanted to build a small receiver with minimal amount of parts but still give good result. Also, I tried to build the radio with a battery pack, so I can take it everywhere and plug in headphones and antenna, even without switching the power, i can immediately receive. And here is the result: a radio with only 12 parts including the battery pack. I powered it by one cell of Li-Po battery and the voltage (3.6-4.2V) is lower than the spec’ed lowest voltage of NE602 (4.5V) and it will give a bit lower conversion gain but it is good here as it rejects BCI even better. I didn’t choose an audio connector with a switch so I wired the power line of NE602 after the headphone, and I need to add 1uF to NE602 to avoid self-oscillation. The sensitivity is not high but it give good enough volume to a sensitive stereo headphone of 32 ohms in series if you have a standard size end feed or dipole antenna. And the noise pattern is quite good to hear.

The overall current draw is about 3mA so with a small battery pack of 3.7V 600mAh, I can hear about 200 hours! If you have all the parts on hand, please build and let me know your result. If you use Choc perf board to build this radio like me, I will really appreciate it.


Thanks,
Adam

Re: Tiny Toy Receiver

Jim Pruitt
 

Hello Adam.

Some questions about your circuit.  First I see no information about the tuned inductor.  What did you use?  Second,  you have an X through a .01uf capacitor on the collector/output of the transistor.  Does that mean that collector goes directly to ground? Or does it mean the entire connection including ground is removed?  In looking at it, it looks a lot like most of the direct conversion receivers I have seen, with the exception of the transistor rather than an LM386 audio amp.  Chuck Adams did a group project of a direct conversion receiver and provided gerbers for buying your own pc boards on his email group (qrp-tech).  He used a toroid for that input coil.  Granted,  it also uses an LM386 audio amp so might not be as friendly to a 3.5 volt battery but works well on a 9 volt battery.

Thank you for the idea.

Jim Pruitt
WA7DUY


On 10/14/2018 7:49 AM, Adam Rong wrote:
Gang,

Here I show you my recent project.

Inspired by the receiver portion of VK3YE’s tiny toy CW transceiver (search YouTube videos to know more about this radio), I wanted to build a small receiver with minimal amount of parts but still give good result. Also, I tried to build the radio with a battery pack, so I can take it everywhere and plug in headphones and antenna, even without switching the power, i can immediately receive. And here is the result: a radio with only 12 parts including the battery pack. I powered it by one cell of Li-Po battery and the voltage (3.6-4.2V) is lower than the spec’ed lowest voltage of NE602 (4.5V) and it will give a bit lower conversion gain but it is good here as it rejects BCI even better. I didn’t choose an audio connector with a switch so I wired the power line of NE602 after the headphone, and I need to add 1uF to NE602 to avoid self-oscillation. The sensitivity is not high but it give good enough volume to a sensitive stereo headphone of 32 ohms in series if you have a standard size end feed or dipole antenna. And the noise pattern is quite good to hear.

The overall current draw is about 3mA so with a small battery pack of 3.7V 600mAh, I can hear about 200 hours! If you have all the parts on hand, please build and let me know your result. If you use Choc perf board to build this radio like me, I will really appreciate it.


Thanks,
Adam