开云体育

Guys, I plan to offer an assortment kit at 20 USD including tracked shipping. If you order along with ADX-S kit, the price is 14 USD. 30m LPF band filter (680pF is used in place of 660pF) 17m LPF band filter Modification kit (2x 1N4007, 1x 10uF cap, 1x 3mm red LED and 4x original BS170 as spare) HEX file for the above to support 40, 30, 20, 17m and the modifications, so you can easily download using XLoader Please let me know if you are interested. The earliest shipping date is August 14. Please wait for my green light to start payment. Thanks, Adam

The following items have been added to the Files area of the [email protected] group. /ADT/ADT_V1.0.ino By: Adam Rong <rongxh@...> Description: Source code V1.0 for ADT - Arduino Digital Transmitter by BD6CR

USA customers, Please check out this service alert. Before it gets stablized, I would ask if you can hold your order. For the orders I have received, I will figure out a way to fulfill. International inbound mail and packages from China and Hong Kong Posts - Newsroom - About.usps.com Thanks, Adam

Guys, I have done the English manual at: /g/crkits/files/CR123/CR123%20Kit%20Assembly%20Manual.pdf The new year holiday will end today, and we are ready to take more orders. 45 USD including air shipping: a set of CR-1, CR-2 and CR-3 88 USD including air shipping: 2 sets of CR-1, CR-2 and CR-3 18 USD including air shipping: any one of CR-1, CR-2 or CR-3 PayPal direct to rongxh@... and leave your ship to address and telephone number please. Thanks, Adam 在 2024/12/29 16:49, Adam Rong via groups.io 写道:

The following items have been added to the Files area of the [email protected] group. /CR123/CR123 Kit Assembly Manual.pdf By: Adam Rong <rongxh@...> Description: English manual dated Feb 1, 2025.

Hello, I have modified my adx-s to install the bt401 module, but I have the problem that it is not bidirectional, when changing the ft8cn software to TX the bt401 module does not send the audio to the adx. Should I configure something else in the bt401? Thanks

Hi all, With the new year, I am thinning the radio collection. I have a CRK-10A 7030 KHz assembled for sale on Ebay (https://www.ebay.com/itm/267111671746?itmmeta=01JGKX658CW6V93WQEM3AS9YGH&hash=item3e3118a7c2:g:nxYAAOSw6VdndDvf) It's the version for 7030 KHz and puts out about 2.25 watts with a 13.8VDC supply. There are a bunch of pictures on Ebay. The transceiver is in excellent condition. I am asking $60 plus $10 shipping. Thanks, Andrew N4WT

Guys, Merry Christmas! Now you can see the photos of the whole set of three (forget about the new camera battery and charger): https://mp.weixin./s/5zesl24Ep2nl-IKftKl8yg The kits are co-designed with a teacher in Beijing for youngsters in China for regional and national contests. We are glad to offer kits to our group members as well. CR-1: Audio Morse code trainer with volume and tone controls (the on-board speaker is not a part of the kit) CR-2: FM transmitter of 87.5-88.7 MHz, five frequencies, and it can sit on top of the CR-1 to support voice or morse code transmission. Without the external antenna, it can transmit to the next room CR-3: FM receiver in two modes, one for general coverage of 87-108 MHz, and the other is for 87-89MHz to work with CR-2 (a wire antenna is supplied, but the on-board speaker is not a part of the kit) The PCB size is 60 x 90 mm. The early bird price is 45 USD for all 3 kits including air shipping. I can ship in 2 weeks before Chinese New Year. The next batch will be after the new year holiday. Please PayPal directly to rongxh@... and leave your ship to address and telephone number. If you wish to buy 2 kits, the price is 88 USD. Thanks, Adam

The following items have been added to the Files area of the [email protected] group. /CR123/CR123制作说明.pdf By: Adam Rong <rongxh@...> Description: Assembly Manual in Chinese. Part list is a bit different. FYI.

Folks, I got more info about SSB6.1 now. It is a 6-band SSB transceiver board kit supplied by a Chinese ham BD7JPY, with many SMD parts and several through hole parts as well. It needs to work with a VFO like DDS module and a linear power amplifier as it outputs about 50-mV RF for transmission. Right now, he can provide two types of DDS modules in limited quantity. No more power amps nor chassises. Reference material is very limited. No instructions or manuals but a schematic and a PCB silkscreen drawing. A reseller (not ham) is reselling this kit to worldwide through eBay and the price is low considering it is a 6-bander. I have purchased a sample and will do some evaluation. If it turns out to be promising, I can provide a limited quantity to the subscribers to this group, so we can build along. Let me know if it is a good idea. Thanks, Adam

Guys, Normally the tracking number is updated in PayPal. If you cannot find the tracking info, especially for recent orders, please let me know so I will check if you have a new tracking number because your parcel was resent. Thanks, Adam

Gang, QRPBuilder is announcing two new paddles. They are an iambic and single lever design similar to our other paddles, but are attached to your project by neodymium magnets, and can be moved from radio to radio, or removed for storage or transportation. https://qrpbuilder.com/magnetic-iambic-paddle https://qrpbuilder.com/magnetic-single-lever-paddle 73, Ken – wa4mnt

Hi Adam, Besides the enjoyment I get from doing the assembly, your kits also give me the opportunity to learn more about how receivers, transmitters and their software work. I've been studying the ADX-S to understand it better and find it's very interesting. The ADX-S v2 manual states: Since the ceramic filter has tolerance on bandwidth and center frequency, it is better that you fine tune your own beat frequency, so you can get higher SNR and less interference. In order to do so, you do a search in the source code and you will find two different beat frequencies. One is 460570, the other is 449430. For now, 449430 is only for 20 meter band. Adjust them at 500-1kHz step and compare with the default setting, so you will get the best value for your kit. Can you suggest the best way to evaluate the highest SNR and lowest interference when adjusting the IF's? For example, could I supply the ADX-S with RF from a signal generator then peak the IF for strongest output as seen on a WSJT-X waterfall? Please tell me the method you would use. Thank you, John L. AA7US

In Ontario, unbuilt kit. make an offer.