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CS-Series IF
Adam, The CS-Series is a great platform for learning and experimenting by changing a few components at a time just to see what effect it has. So I'm curious why 8.4672 MHz was chosen as the IF in the CS-Series transceiver? Could another frequency in the 8-10 MHz range be safely substituted for experimental purposes? I do realize this would require completely recalculating and rebuilding the crystal ladder filter, replacing the crystal in the IF amp, and also altering the Arduino software. Thank you, John AA7US
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CAT for CS-series
Adam Rong
Gang,
I think everyone should be informed of this effort by JH3BTK. He did modification for JT-65 and FT-8 before and now he is supporting CAT for CS-series. http://www.geocities.jp/mx6s/JH3BTK2.html Thanks to Nakajima-san for English translation. Thanks, Adam
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Pixie 2 and NE602+LM386 videos
Adam Rong
Gang,
https://youtu.be/8ZXhJMG3lvQ Finally I got the OMRON switch and completed the Pixie 2 build. I hope you will love it. As a bonus, I introduced NE602+LM386 receiver build. Thanks, Adam
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Re: China CW rigs
Thank you. Now that I have the name I know where to get the kits. 73BOB AF2DX
Sent from my Verizon Wireless BlackBerry
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Re: China CW rigs
mizuhoradio@yahoo.com <mizuhoradio@...>
I know I'm not Larry, but the HB1B is manufactured and sold by Youkits. You can buy them factory direct at http://www.youkirs.com or from Vibroplex, theie US distrubtor. 73, Caitlyn K9NI Sent from my Boost phone.
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China CW rigs
Larry,who is selling the HB1B CW rigs now? BOB. AF2DX
Sent from my Verizon Wireless BlackBerry
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Re: Frequency Display for Sandwich
n7rgw
I have new faceplates for the Display options. I may sell the faceplates if there is a large enough demand. But the complete kits are now available. Still working on some improvements for the software.
You can see the differences in the photo.
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Re: KN-Q7A VRS CS
kb1gmx@...
it was easy enough for me and was done as I tend to be impatient. I build
with parts I have now rather than parts that may arrive some day. Its more a matter of experience of my youth when money was scarce' and I had to figure out how to do things because I could not buy what I wanted. Often even if money was not an issue what I wanted was not available though local outfits. So I learned how to do what what desired. Solving problems of whats needed and what I have are part of what I enjoy of building. It is a challenge. Allison/Kb1GMX
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Re: KN-Q7A VRS CS
Adam Rong
It is not easy to remove turns. You can buy DIY7-21 from me at 1.5 USD each plus reasonable freight.
toggle quoted messageShow quoted text
Thanks, Adam
On Oct 6, 2017 9:42 AM, kb1gmx@... [CHINA_QRP] wrote: I'm one that does SSB from scratch and modding my KNQ7A was more for the fun buying a kit that does more. 15M, since we are going down the sunspot cycle I'd expect most would opt for 17M or 20M. Good to hear there are people that are not turned off by low solar numbers. I say that having done very well the bottom of last cycle on 10M running QRP (4W) homebrew SSB. FYI with a sharp eye and tweezers its possible to remove turns from the dy-7 coils. allison/kb1gmx
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Re: KN-Q7A VRS CS
kb1gmx@...
I'm one that does SSB from scratch and modding my KNQ7A was more for the fun buying a
kit that does more. 15M, since we are going down the sunspot cycle I'd expect most would opt for 17M or 20M. Good to hear there are people that are not turned off by low solar numbers. I say that having done very well the bottom of last cycle on 10M running QRP (4W) homebrew SSB. FYI with a sharp eye and tweezers its possible to remove turns from the dy-7 coils. allison/kb1gmx
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Re: KN-Q7A VRS CS
kb1gmx@...
hello,
I've done 10M with KNQ7A the mods are simple but the finals i used are: RD06hhf as its a better performer at 30mhz. Final was IRF510, properly matched it does well even at 6M. a RD16HHF would be a good choice too. Coils and caps were done with toroids and variables. The VXO crystal is the bigger challenge for most, I had something that worked well for around 28.400 but a SI570 or 5351 is a good choice too. The IRF530 I have driven that at 6M and with 24V and .6W drive it's good for about 9W. The magic is that the gate impedence is very low due to the input C is high and you drive it like any other power device at low impedances. It doesn't lack gain even at low VHF. Allison/kb1gmx
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Re: Pixie2 on Choc Perfboard
Allan Esterhuizen
On 03-Oct-17 8:21 AM, 'Adam Rong'
rongxh@... [CHINA_QRP] wrote:
Not an issue for me , Yahoo isn't blocking them from what I can
see
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Re: Pixie2 on Choc Perfboard
No pictures on this end either Bob AF2DX
toggle quoted messageShow quoted text
Sent from my Verizon Wireless BlackBerry From: "'Adam Rong' rongxh@... [CHINA_QRP]" <CHINA_QRP@...>
Sender: CHINA_QRP@...
Date: Tue, 03 Oct 2017 05:21:01 +0800 To: <CHINA_QRP@...> ReplyTo: CHINA_QRP@...
Subject: Re: [CHINA_QRP] Re: Pixie2 on Choc Perfboard John, Thanks, Adam
On Oct 2, 2017 10:05 PM, landrjoh@... [CHINA_QRP] <CHINA_QRP@...> wrote: Adam, I don't know if it's just me, but I'm not seeing any pictures of your Pixie2 project with your message here on the CHINA_QRP Yahoo forum. 73, John AA7US ---In CHINA_QRP@..., <rongxh@...> wrote : I made this popular CW radio on 2 units of Choc Perfboard today.
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Re: Pixie2 on Choc Perfboard
Adam Rong
John,
toggle quoted messageShow quoted text
I am not very sure, but probably because the attachment is so big that Yahoo blocked it. Does anyone see the pictures? Thanks, Adam
On Oct 2, 2017 10:05 PM, landrjoh@... [CHINA_QRP] wrote: Adam, I don't know if it's just me, but I'm not seeing any pictures of your Pixie2 project with your message here on the CHINA_QRP Yahoo forum. 73, John AA7US ---In CHINA_QRP@..., wrote : I made this popular CW radio on 2 units of Choc Perfboard today.
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Re: From Bob AF2DX
Hi ADAM. No family here so things are quite on holidays. Making Contacts is hard with all the QRM but did manage. A few 1 to 200 miles aways big DX but it keep my CW up. Have a nice Holiday BOB AF2DX
toggle quoted messageShow quoted text
Sent from my Verizon Wireless BlackBerry From: "Adam Rong rongxh@... [CHINA_QRP]" <CHINA_QRP@...>
Sender: CHINA_QRP@...
Date: Mon, 2 Oct 2017 23:59:40 +0800 To: <CHINA_QRP@...> ReplyTo: CHINA_QRP@...
Subject: Re: [CHINA_QRP] From Bob AF2DX Hi Bob, Good to hear from you again. Take care of yourself and your family. Here in China, it is a national holiday equivalent to July 4 in US. We have several days off, so we will plan for a family trip driving my car.
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Re: From Bob AF2DX
Adam Rong
Hi Bob,
toggle quoted messageShow quoted text
Good to hear from you again. Take care of yourself and your family. Here in China, it is a national holiday equivalent to July 4 in US. We have several days off, so we will plan for a family trip driving my car.
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From Bob AF2DX
Still here but in the hospital again with my HB1B QRP radio To much QRM but copy strong stations OK. 73 BoB AF2DX
Sent from my Verizon Wireless BlackBerry
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Re: TXCO with CS-Series Transceiver?
Adam Rong
John,
toggle quoted messageShow quoted text
Of course it will work with a TCXO if you need better stability. TCXO is an active crystal, and the accuracy is very high, so I suppose there is no need for calibration. Thanks, Adam
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TXCO with CS-Series Transceiver?
Hi Adam, What considerations should be made to replace the stock crystal oscillator with a TXCO (Temperature Controlled Crystal Oscillator) on the Sandwich VFO for greater frequency stability when operating on digital modes? Can the frequency of the Sandwich VFO oscillator be safely changed if needed? Lower? Higher? Thank you, John AA7US
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Re: Pixie2 on Choc Perfboard
Adam,
I don't know if it's just me, but I'm not seeing any pictures of your Pixie2 project with your message here on the CHINA_QRP Yahoo forum. 73, John AA7US ---In CHINA_QRP@..., <rongxh@...> wrote : I made this popular CW radio on 2 units of Choc Perfboard today.
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