Date   
Re: BC breakthrough

Trent Trent
 

Where I am the nearest AM BC antenna is over 50K away so I have nothing near me onAM


On Tue, 25 Jun 2019 at 21:26, Adam Rong <rongxh@...> wrote:
Trent,

BCI is the nature of a direct conversion receiver. The crystal and the 27p cap in the front end will help reduce it, however I did receive a BCI report from Beijing where the MW broadcast station is nearby, after selling over 100 kits. An additional BCI filter inserted between antenna and the D4D will be helpful. If you can confirm MW station is the major problem, you can consider making one following this page:
http://www.calculatoredge.com/electronics/ch%20pi%20high%20pass.htm

Thanks,
Adam

在 2019年6月25日,上午11:10,Trent Trent <vk7hrs@...> 写道:

I just made my first and fuckin LAST crkits 20M FT8 transceiver,i've done most of it on the TX side and as I done the RX side which it is missing the needed 27p cap all I get is fuckin BC from ABC radio here in VK7 no matter what I do

Re: BC breakthrough

gm0sim@...
 

I still think that a $39 kit that fits in a cigarette packet sized box as a cheap introduction to FT8 is a valid and useful product for many (OK not all but you have to accept some compromises for that price/size).

Surely that is the whole point of AMATEUR radio... self training & the ability to investigate and resolve problems yourself.

Although... who should I complain to about the state of the ionosphere at the moment... that is just not on 🙁

regards- Ian gm0sim


From: crkits@groups.io <crkits@groups.io> on behalf of Trent Trent <vk7hrs@...>
Sent: 25 June 2019 04:10
To: crkits@groups.io
Subject: [crkits] BC breakthrough
 
I just made my first and fuckin LAST crkits 20M FT8 transceiver,i've done most of it on the TX side and as I done the RX side which it is missing the needed 27p cap all I get is fuckin BC from ABC radio here in VK7 no matter what I do

Re: BC breakthrough

Adam Rong
 

Folks,

I agree that problem solving is part of Amateur Radio, especially dealing with BCI. However, as the designer and kit provider, I should have made it clear that this is something new and people may meet problems.

Perhaps it is good idea to find the source of the interference first. I did a web search and found the following stations in Hobart, Tasmania very near you:
ABC Radio 936kHz
ABC RN 585kHz
ABC News on Radio 747kHz

Compare with an AM radio receiver and you will find out the possible source of interference. If you are not sure about the finding, perhaps you can contact ABC to know the frequency list and distance of the interference, including LW, MW and SW, so you can insert a band stop or other type of filter.

Personally I have a similar experience to identify a strong BCI and finally found the source of the noise. It is a lot of fun indeed and it is good for you as you can start to try many more kits of direction conversion type later.

I appreciate all the feedback and I think it is part of the experience of providing the kit. Let me know if you need me to ship the missing part. As I am getting 42, I start to forget something. If you need me to refund to cover the postage and cost of sourcing locally, I will be glad to do so. A happy customer is more important, always.

Thanks,
Adam

Re: BC breakthrough

Zach Davis - KA0US
 

For the 20m kit which do you all think would be better a MW bandstop or a 20m Bandpass?

Re: BC breakthrough

 

A simple BCI filter on the RX path would solve this issue.

 

Re: Z-match Antenna Tuner on Choc perfboard

Adam Rong
 

Thanks John. I just made the first QSO with the Z-match tuner and my dorm EFHW. It works just fine.

Thanks,
Adam

Re: BC breakthrough

Trent Trent
 

The better option is puttin a BPF instead of a LPF which is the better way but as I have constant headaches etc doe to pressure on my spinal cord I cant out the values and the online online calcs are useless

Re: BC breakthrough

Bryan Corkran, VK3KEZ
 

On 27 Jun 2019, at 9:50 am, Trent Trent <vk7hrs@...> wrote:

The better option is puttin a BPF instead of a LPF which is the better way but as I have constant headaches etc doe to pressure on my spinal cord I cant out the values and the online online calcs are useless

Re: BC breakthrough

Cues Ahero
 

trent,i have chronic cluster headache,terminal scleraderma and my kit building days are. pretty much gone due to parkinsons at the moment. i envy your current kit problem. cheers,p


On Wed, Jun 26, 2019, 4:50 PM Trent Trent <vk7hrs@...> wrote:
The better option is puttin a BPF instead of a LPF which is the better way but as I have constant headaches etc doe to pressure on my spinal cord I cant out the values and the online online calcs are useless

Re: BC breakthrough

Cues Ahero
 

although i feel your pain :),......


On Thu, Jun 27, 2019, 1:11 PM Cues Ahero via Groups.Io <My09vstrom1=gmail.com@groups.io> wrote:
trent,i have chronic cluster headache,terminal scleraderma and my kit building days are. pretty much gone due to parkinsons at the moment. i envy your current kit problem. cheers,p

On Wed, Jun 26, 2019, 4:50 PM Trent Trent <vk7hrs@...> wrote:
The better option is puttin a BPF instead of a LPF which is the better way but as I have constant headaches etc doe to pressure on my spinal cord I cant out the values and the online online calcs are useless

New Antenna Products Forecast

Adam Rong
 

Folks,

I will announce two new wire antenna (kit) products shortly.

The first one is the new model Gipsy multiple band dipole to cover 60-6 meter bands with marking of 9 amateur bands on the wire. It can support 100 watts PEP. As the last generation, the antenna is well built and beautiful. I will put info on the web site and will take order immediately. The introductory price will be competitive.

The other is a QRP PCB antenna without wire. I call it Mini Wire Antenna. With the parts in the kit, you can build an EFHW or a dipole. The toroid is a Fair-Rite FT series. The price is competitive. I will start sample build this weekend and take order in about 2 weeks. It will be a great companion with our D4D kit.

BTW, as I announced before, the introductory period will end for D4D. Shipping cost of a few dollars will be added to the price from July. I will update web site this weekend.

Thanks,
Adam

Re: New Antenna Products Forecast

Adam Rong
 

Also, the first lot HT-1A kit or assembled kit will be gone shortly. The second lot is being manufactured. It might cause temporary shortage for a few weeks. It is another beautiful and useful radio for CW enthusiasts.

Thanks,
Adam

Re: New Antenna Products Forecast

Charlie Vest
 

Any idea when the new model Gipsy will be available to order Adam ?


Thank you ,

Charlie , W5COV

On June 27, 2019 at 8:08 PM Adam Rong <rongxh@...> wrote:

Folks,

I will announce two new wire antenna (kit) products shortly.

The first one is the new model Gipsy multiple band dipole to cover 60-6 meter bands with marking of 9 amateur bands on the wire. It can support 100 watts PEP. As the last generation, the antenna is well built and beautiful. I will put info on the web site and will take order immediately. The introductory price will be competitive.

The other is a QRP PCB antenna without wire. I call it Mini Wire Antenna. With the parts in the kit, you can build an EFHW or a dipole. The toroid is a Fair-Rite FT series. The price is competitive. I will start sample build this weekend and take order in about 2 weeks. It will be a great companion with our D4D kit.

BTW, as I announced before, the introductory period will end for D4D. Shipping cost of a few dollars will be added to the price from July. I will update web site this weekend.

Thanks,
Adam

Re: New Antenna Products Forecast

Adam Rong
 

Charles,

You can place email order right now and we will ship in a week or so. The introductory price is 85 USD including air shipping. In CRKits version, you will get a free SL-16 to BNC adapter in case you have thread compatibility problem. It did happen before per my experience.

SL-16 is equivalent to M or SO239 connector but in a metric thread.

Thanks,
Adam

在 2019年6月28日,上午9:28,Charles Vest <cvest@...> 写道:

Any idea when the new model Gipsy will be available to order Adam ?


Thank you ,

Charlie , W5COV

On June 27, 2019 at 8:08 PM Adam Rong <rongxh@...> wrote:

Folks,

I will announce two new wire antenna (kit) products shortly.

The first one is the new model Gipsy multiple band dipole to cover 60-6 meter bands with marking of 9 amateur bands on the wire. It can support 100 watts PEP. As the last generation, the antenna is well built and beautiful. I will put info on the web site and will take order immediately. The introductory price will be competitive.

The other is a QRP PCB antenna without wire. I call it Mini Wire Antenna. With the parts in the kit, you can build an EFHW or a dipole. The toroid is a Fair-Rite FT series. The price is competitive. I will start sample build this weekend and take order in about 2 weeks. It will be a great companion with our D4D kit.

BTW, as I announced before, the introductory period will end for D4D. Shipping cost of a few dollars will be added to the price from July. I will update web site this weekend.

Thanks,
Adam

Re: New Antenna Products Forecast

Adam Rong
 

Folks,

Now the 6-60m 100W Coil Dipole Antenna is orderable from the drop down menu of D4D Frequency and Options. Also, I have added a new USB Sound Card option at affordable price. The sound card is a Chinese famous brand and the performance is tested okay with D4D.
http://crkits.com

The Mini Wire Antenna sample PCB is received. It seems good. I am waiting for parts and writing kit manual to be able to ship. Hopefully in 2 weeks.

Thanks,
Adam

Preliminary Specifications of 6-60m 100W Coil Dipole Antenna

Adam Rong
 

6-60m 100W Coil Dipole Antenna

Frequency: 5-54MHz Continuously Adjustable
SWR: ≤1.5
Impedance: 50Ω
Power: 100W PEP
Irradiator: AWG18 Teflon Wire
Outlet: SL16 (SO239 equivalent but with different thread),  SL16 to BNC adapter attached
Package Size: 75×75×130(WDH,mm)
Gross Weight: 0.65kg

Re: Preliminary Specifications of 6-60m 100W Coil Dipole Antenna

Charlie Vest
 

Adam ,

I have one of these antennas on order and am looking forward to adding it to my currently limited antenna farm .

Could you please supply the overall length so I can make plans on where to install it when it arrives ?

Thank you ,

Charlie , W5COV 


On June 29, 2019 at 12:10 PM Adam Rong <rongxh@...> wrote:

6-60m 100W Coil Dipole Antenna

Frequency: 5-54MHz Continuously Adjustable
SWR: ≤1.5
Impedance: 50Ω
Power: 100W PEP
Irradiator: AWG18 Teflon Wire
Outlet: SL16 (SO239 equivalent but with different thread),  SL16 to BNC adapter attached
Package Size: 75×75×130(WDH,mm)
Gross Weight: 0.65kg

Photos of Mini Wire Antenna Sample Build

Adam Rong
 

Folks,

See this page in Chinese:
https://mp.weixin.qq.com/s/hQLW6Trv837d5q2eXay3aQ

The first photo is for 49:1 UNUN for EFHW, and the second photo is for 1:1 BALUN for Dipole. It will be added to the option drop down list of D4D in a week or two. Now I am still waiting for parts and massive production PCB.

The PCB design is inspired by nice designs from QRPGUYS. My design part is that the same PCB can be used for both EFHW and Dipole.

Thanks,
Adam

D4D: The First eHam Product Review

Adam Rong
 

Folks,

See this link:
https://www.eham.net/reviews/detail/14267

Thanks for 5.0/5.0 review from OK1UDA. You can write your review there. 

Thanks,
Adam

Re: Preliminary Specifications of 6-60m 100W Coil Dipole Antenna

Adam Rong
 

Charlie,

It is a full length dipole so the overall length would be somewhere at 30m for 60m band. If your space is not enough, you can consider an inverted V.

As the name Gipsy shows, it is better for mobile usage. 

Thanks,
Adam