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CPK-3 FB (ferrite bead)
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I just received my kit today. I also ordered off the internet a couple of the KT0936MB9 IC's to build the radio from scratch. I'm stuck on the ferrite bead. I understand what it does as I have built several Regenerative radios and they use a RF choke. I assume this is the same principle. I want to order a few of the ferrite beads but I can not find any information on the size/value of the bead to be able to order it. All other parts I can find. Please can someone give me the value or links to order some of the same ferrite beads in the CPK-3 kit. Also can you buy the PCB separately? Thank you very much! Ron Heikes
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National Holiday 9.30 - 10.7
Guys, No shipping during this period. Please share the kit building progress with us, either photo or video will do. Thanks, Adam
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Testing RX-888 MK2 High Performance SDR
11
Guys, Have you tried this 32MHz bandwidth 16 bit ADC SDR receiver? The performance seems very good. I am testing and loving it. Thanks, Adam
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Guys, CPK-4 is a crystal controlled QRPP CW TX. I wish to offer 40, 30 and 20m on QRP frequencies. It works with any SSB receiver on hand. See this post in Chinese: https://mp.weixin./s/Q1TaIwT6NBeVdAyoXZIhRQ Thanks, Adam
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If you visit Shanghai
4
Guys, You can visit my shack and let's do some CPK kit building together. See this post: https://mp.weixin./s/uRZCcKSIWmaPZzf35C-h5g Thanks, Adam
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File /CPK4/CPK-4 QRPP CW TX Assembly Manual.pdf updated
#file-notice
The following files and folders have been updated in the Files area of the [email protected] group. /CPK4/CPK-4 QRPP CW TX Assembly Manual.pdf By: Adam Rong <rongxh@...> Description: CPK-4 Assembly Manual, formal release
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File /CPK4/CPK-4 QRPP CW TX Assembly Manual (Draft).pdf uploaded
#file-notice
The following files and folders have been uploaded to the Files area of the [email protected] group. /CPK4/CPK-4 QRPP CW TX Assembly Manual (Draft).pdf By: Adam Rong <rongxh@...> Description: CPK-4 Assembly Manual, draft
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Re
2
Jim WB4ILP you want to look up the Mighty Mike CW tx as sold my Far Circuits in Chicago., owner Fred , price is in the seven dollar range as I recall... PCB only this will produce 7 W out and requires IRF 510 and various magnetic components. You could take the bag of bits from Adam and supplement it for say $15 including postage and get a really manly Tx out of it. Have a look at Freddo's component list -you'd be surprised what else might be there ... It gets better - Pacific antennas sells a Keyer kit by Weber for not that many dollars. It is Not the most brillig as it does not save the last config on power down but at price beggars can't be choosers. Basically you get -3 db power of that of an ANGRY-9 Korean war back pack Radio with 1/100 of the weight plus the Angry requires 380 V B+ . Moreover with the ANGRY -9, no keyer. Timothy E. Fidler : Engineer BE Mech Auckland HR Call ZL1MZR (HF) Telephone Whangarei 022 691 8405 e: Engstr@...
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Hello I'm new to amateur radio and this is my first radio build. I have assembled the main board and the 40m LPF, but all 5 LEDs remain lit with the LPF board installed. What have I tried? At first I thought it might be the microcontroller board; a) so I tried the 3v3 and 5v tests at R1 and U2(Vin) respectively, all good. b) I reflashed the microcontroller with the hex file (it flashed fine but didn't fix the issue) c) I bought a new arduino nano, flashed that - still all LEDs are on. I don't have a spectrum analyser, only a DSO, a multimeter that measures Hz and an ATU-100. Connecting the ADX-S V2 to the ATU and a dummy load, I see no power measured by the ATU. Holding down SW1 and SW2 does not make the TX LED flash. Two LEDs are lit on the Nano (pwr and L) Ther BFO LED is not lit. Advice on where to probe, what to look for would be most appreciated. I have a DSO and multimeter. 73 Rich VK2 LTC
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Guys, I built a 15 meter QRPPP TX this weekend. See this post: https://mp.weixin./s/DbtwvnVvmbVxg2QSPFDrqw Thanks, Adam
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7010 crystals shortage
3
Guys, I will consume all the 7010 crystals very soon, and it is your choice to replace with 7020 or 7025 crystals. That said, the Pixie2023 will become 7020&7030 or 7025&7030 instead of 7010&7030. Please vote. Thanks, Adam
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File /PIXIE2023/Change Notice 20240828.txt uploaded
#file-notice
The following files and folders have been uploaded to the Files area of the [email protected] group. /PIXIE2023/Change Notice 20240828.txt By: Adam Rong <rongxh@...> Description: Configuration change notice from 7010&7030 to 7025&7030.
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Re
3
NIgel young.. do you know of somewhere Retail in Nz where I can get the Misi RF Mosfets RD16H1f1 or the RD16HH. I am shortly getting a IRF510 based Tcvr and I'd like to try abit of power improvement. I know about MiniKits in ADL but the cost over the Tasman is somewhere north of 16 dollars for a minimum parcel. Technoman in CHCH maybe ? I'm thinking he might have them as spares for the G90 radios he sells. AUckand as a vendor position is better for me . Intelec in Howick does not carry this part but do have ferrites and similar bits . regards, Timothy E. Fidler : Engineer BE Mech Auckland HR Call ZL1MZR (HF) Telephone Whangarei 022 691 8405 e: Engstr@...
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Guys, I went to Mount Changbai, very close to North Korea. I wrote a wechat blog about the food there. https://mp.weixin./s/IrI_3jA8rrjjaYxi1JKH3g Thanks, Adam
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Summer Vacation August 5-11
3
Guys, Plan to take a few days off with my family. I will prepare some kits in stock, so my shipping forwarder still can ship while I am out of the town. So far, I have cleared all the backlog orders. Thanks, Adam
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Hello I assembled my ADX-S V2 yesterday. I realized that the spacers between the between the base board and the lower board are too short. The BNC socket is too high, about 2mm distance is missing The hole in the box was created by the corners of the circuit boards The transportation to Germany was apparently too heavy Greetings Bernd DL3BLA
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3V DC Receiver
Guys, I followed DL6ZB 1.5V RX and made a few changes based on what I had on hand. It worked quite well. Some BY hams also successfully built it. Share with you guys. Thanks, Adam
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Guys, A few days ago Matt surprised me that he published a two page article about CPK-3 named World Receiver in a Match Box on CQ-DL, the amateur radio magazine in Germany. It is so popular that I have to work hard last weekend to fulfill the orders from Germany. Good news is I have shipped all earlier today. Thanks Matt for the article and the support from Germany. I hope you enjoy the minimalist world receiver kit. Thanks, Adam
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Video: ADX-S V2 Field Demo
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https://youtu.be/4SSG5xF816k?si=1wj9OJheTi-ctMkB Thanks, Adam
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Guys, Two customers reported the same issue, and I think it is better to write a message here. If you can pair the Bluetooth module with your smartphone but you cannot send or receive signal, you probably forget to connect the audio in and out - PA0 and DACL. These two pins are not in the 4-pin header. Instead they are on the PCB side. I write becase I know you don't read Assembly Manual :p BTW, if you cannot trigger TX, you should increase the Bluetooth volume to the max. No worries about over driving it. Thanks, Adam
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Image Name
Sat 8:39am
Sat 8:39am