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Title: VE3ELQ modulator board UPDATE Post by: km6sn on December 07, 2019, 04:13:06 PM update 1/3/20
Andy, ND8D has graciously shared his PCB layouts for Nigel's PWM generator and PWM driver. With this board set you can make a complete modulator. The PWM generator is https://oshpark.com/shared_projects/Dw1PsRCf and the PWM driver is https://oshpark.com/shared_projects/E39m7Eaa Many thanks to Andy for his generous contribution to the art. Rod KM6SN ...... end update After struggling with KICAD to make a VE3ELQ PWM board, I discovered deeply buried in some of these posts that OSHPARK has ready-made boards for Nigel's modulator, courtesy of ND8D (thanks ND8D). Title: Re: VE3ELQ modulator board Post by: ND8D on December 07, 2019, 06:25:39 PM Hello!
I forgot about that PWB on OHSPARK. I would not recommend ordering it since I got the wrong footprint for the IR2110S on there and it is a royal pain to make work. I have since iterated that design into two seperate boards, a MiniPWM and PWM_Driver, One is for low level PWM generation and the other for driving the half bridge. MiniPWM: https://oshpark.com/shared_projects/Dw1PsRCf PWM Driver: https://oshpark.com/shared_projects/E39m7Eaa I have some larger boards made but they are not economical to run through OSH park. For example. I have a PWM driver board with the filter integrated on board, a more advanced PWM modulator board with an arduino and VFO on board, and a handful of PA designs. Most of these I run through board houses that require a minimum order of 10, so I have extra bare boards I can sell for the cost of shipping! 73's ND8D Title: Re: VE3ELQ modulator board Post by: km6sn on December 07, 2019, 10:36:08 PM Andy, Thanks for the reply. I appreciate the help. Rod
Title: Re: VE3ELQ modulator board Post by: N4LTA on December 08, 2019, 10:59:16 AM I have my own layout that I am building just for me. I would not make Nigel's work available other than doing a project for myself unless he approved. I hope that he approved yours.
On my version, I separated the output board and the PWM drive. Working on a 400 watt 75 meter rig now. The PWM generator is a surface mount board and the output board is through hole single sided. Doing some testing now Pat N4LTA Title: Re: VE3ELQ modulator board Post by: M0VRF on December 08, 2019, 06:28:49 PM Simples AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
About an inch square. https://644db4de3505c40a0444-327723bce298e3ff5813fb42baeefbaa.ssl.cf1.rackcdn.com/f4cc61755d341eb6b4f0b2f6c4c7fbef.png |