开云体育

Hi Everyone I have uploaded files for the STM32 BluePill based digital VFO including the software. The VFO is based on the work of radio hams JA2GQP and JA2NKD to whom I acknowledge for there work. I am not a software engineer or programmer so the software side of the Irwell project has and continues to be a difficult challenge for me, that said I have manged to make changes to the original software so that it is functional for the Irwell project as it is to-date. In its current state the software is fully functional for a single conversion superhet receiver or transceiver using two of the three Si5351 chips available on the VFO Oscillator PCB. Moving forward the software does require code adding to drive the third Si5351 IC on the oscillator PCB, this would then serve as a conversion oscillator to drive an additional mixer stage thus facilitating the upgrade of the transceiver to a dual conversion. My idea to do this is replicate the code from the BFO section, the current code for the BFO is such that adjustments and calibration can be made through the use of the "MODE" button used to activate the function then adjustments being made using the VFO's Rotary Encoder. So far I have not attempted to address this software challenge as I feel somewhat out of my depth! If anyone in the group with software skills would be willing to assist or take on the challenge of adding the neccessary code I would be grateful for your help and input. I have commented all of the software changes and additions that I have implemented so far and in the interests of learning I welcome any constructive comments relating to these. Please enlighten me if you feel there are better ways to implement my software changes or additions. In the next few days I will update the blog and document the VFO digital I/O expander which has been built and is working nicely. Regards Andy (G6LBQ)

Hi Everyone I hope you are all keeping well during the difficult times attributed to the Covid19 pandemic. I am slowly updating the files section for my Irwell transceiver so you may notice that some files have disapeared whilst others have been updated. Today I have updated the files for the Cascode IF amplifier and included printable PCB layouts. Please also keep an eye on my blog at https://g6lbq.blogspot.com/ where I am documenting and providing further information on the Irwell transceiver modules and other projects. If you are interested in building any of the Irwell transceiver modules I may be able to supply PCB's and some components subject to availability, please submit your request using the contact form that is available on my blog website. As I update the blog with new Irwell modules I will also update the Groups.IO files section so everything is up to date. Regards Andy (G6LBQ)

The following files have been uploaded to the Files area of the [email protected] group. * /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/G6LBQ Irwell AF Schematic.pdf ( /g/G6LBQ/files/G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/G6LBQ Irwell AF Schematic.pdf ) *By:* g6lbq <ah.electronics@...> *Description:* Schematic diagram for the Irwell transceiver audio subsystem.

The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/Irwell_AF_Top.pdf By: g6lbq <ah.electronics@...> Description: Document containing Irwell Transceiver AF subsystem PCB top layer. Its a high res PDF printable document. The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/Irwell_AF_Top_Mirrored.pdf By: g6lbq <ah.electronics@...> Description: Document containing Irwell Transceiver AF subsystem PCB top layer mirrored. Its a high res PDF printable document. The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/Irwell_AF_Bottom.pdf By: g6lbq <ah.electronics@...> Description: Document containing Irwell Transceiver AF subsystem PCB bottom layer. Its a high res PDF printable document. The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/Irwell_AF_Bottom_Mirrored.pdf By: g6lbq <ah.electronics@...> Description: Document containing Irwell Transceiver AF subsystem PCB bottom layer mirrored. Its a high res PDF printable document. The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/G6LBQ Populated PCB.pdf By: g6lbq <ah.electronics@...> Description: Picture of a completed Irwell audio subsystem PCB.

Hi all Just letting you know more notes / updates /etc, on the Irwell and other interesting topics can be found on Andys Blog site pages Enter on google search to view G6LBQ BLOG and all will be revealed!! Keep busy and stay safe 73 Frank G6YAQ

The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/PCB Dimensions with CAD view.pdf By: g6lbq <ah.electronics@...> Description: Document containing PCB dimensions & CAD view image of Irwell AF Sub-System PCB. The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/Irwell_AF_PCB.pdf By: g6lbq <ah.electronics@...> Description: Document containing printable PCB layout for the Irwell AF Sub-System PCB. The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/PCB Files For Irwell Transceiver AF Sub-System/Irwell_AF_PCB_Mirrored.pdf By: g6lbq <ah.electronics@...> Description: Document containing mirrored printable PCB layout for the Irwell AF Sub-System PCB.

The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/G6LBQ Populated PCB.pdf By: g6lbq <ah.electronics@...> Description: Fully populated PCB - PDF document with photograph of finished module.

The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Transceiver Audio Sub-System/G6LBQ Irwell AF.pdf By: g6lbq <ah.electronics@...> Description: Schematic diagram for the Irwell Transceiver audio sub-system. Revision 1.0

The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Audio DSP Noise Reduction/Arduino Controller Software/BHI_DSP_Control.ino By: g6lbq <ah.electronics@...> Description: Revision 1 of my BHI noise reduction DSP controller software

The following files have been uploaded to the Files area of the [email protected] group. /G6LBQ Irwell Transceiver/Irwell Audio DSP Noise Reduction/G6LBQ Irwell Audio DSP Controller Rev1.pdf By: g6lbq <ah.electronics@...> Description: Schematic diagram for the BHI DSP noise reduction controller by G6LBQ as used in the Irwell HF Transceiver.

Hello to all, Just letting you know the Irwell high spec tcvr is nearing completion after many ups and downs and an update by Andy is due on developments in the very near future. Another project also in the pipeline is the Allstar link node transceiver and has inf on what and what not to be aware of if you are building it, which can be followed on Andy,s blog pages,(google search G6LBQ BLOG) for some very interesting reading on all of the items. So poss irons at the ready soon STAY SAFE Best 73 to all G6YAQ Frank

How critical is it to use for LPF monolithic ceramic capacitors 5% at 2KV instead of the recommended silver mica? I am planning to use the lpf up to 100w power

Dear Andy and all, Greetings from 5Z4BT ! I would like to purchase PCBs for the Mark 2 Exciter. Are there any available from anyone ? Any help greatly appreciated. 73s Sakti

Hello Which capacitors are recommended to be np0 type in bitx mk2? Unfortunately, I have built it with standard ceramic capacitors and I am thinking to change the most critical ones with np0 type...

Hi, i need some advice on the G6LBQ digital VFO. The firmware version is 4.2. I recently built this after having the components in a drawer for some years. The Xtals in the exciter are 11 MHz and so I want to put this in as the offset which I can do. Then the highest frequency which I can extract from the synthesizer is 27.9MHz.If I remove the IF offset I can only tune up to 39MHz. It would appear that the firmware was intended to match an exciter with a 9 MHz Xtal filter. Is there a way around this problem? What is preventing a higher frequency from being extracted? Thanks in anticipation. Gordon

looking for a mk2 lpf board. ron, kc0tdj

Hello all, (FAO Alain) I have been clearing out my shack and have come accross some G6LBQ multiband BITX stuff. Specifically I have the following available: 1 x MK2 exciter PCB 1 x LPF PCB 1 x MK3 Linear Amplifier PCB Note these boards are unused, non populated. Happy to ship world wide. I cannot remember what I paid for them, and will have to look that up if anyone is interested....price will be what I paid for them. HTH Adrian M1LCR

Hi all Apologies if this isn't the correct forum... I have a CDG2000 transceiver "kit" for sale. (The CDG2000 was a very high performance transceiver documented in RadCom a number of years ago. It featured H-mode mixers and a receive chain that challenged the best of commercial receivers performance). I am selling a set of printed circuit boards, screening boxes and the majority of components (pretty much all of the components needed to build the transceiver, but including all of the hard to find components. You need to add a VFO & display). All documentation will be included. ?100 plus postage & packing. 73 Adrian M1LCR