I've been trying to make some PCB's for Steve's
AM Monitor and to be honest.. I Suck! I'm using
ExpressPCB It's FREE!! If anyone is any good at making PCB's I have the resources to make PCB's using Photo-Reactive PCB material. If you can make the design for me I'll make you a FREE PCB from your design.. I've been trying and I can't get it right.. I wind up with a mass of garbled traces that in reality would never work.
I'm going to keep trying, I'm also going to try with something simpler like the SSM2166 compressor/limiter schematic. There are a bunch of free PCB design software if you Google "PCB Design Software" you'll come up with quite a few pages of freebies. Most make proprietary files but you can still export them to BMP and I can turn the BMP into a Negative for PCB processing. Double sided is possible, but the via's will have to be manually soldered, as I have no way of pre-tinning them. Single sided would be easiest.
I'm sure I'm not the only one who could use these PCB's so if there is enough interest if we can get them designed and group together to pay for them to be done professionally you may be able to get your PCB for these designs at cost.. Provided someone's got more smarts than me to do it! That's not too hard to prove! Prescription drug's have fried my brain!
Hi !
Well, first of all, as the circuit designer, I did not ever make a PCB of that particular circuit. I suppose you could make a board for your own individual implementation (anything beyond this would require permission), but you would probably not be pleased with the final results
I have made a large number of changes and improvements to the circuit (including the one with analog meters) over the past few years, and have a production version of the updated monitor.
This can be seen at http://www.radioassociates.com. The new version of the modulation monitor has many, many more features (including a peak hold), and is quite a bit more accurate - as the display responds in microseconds instead of seconds. It comes in a beautiful enclosure as well. If you really want to build it [and calibrate it] yourself, you could get an unassembled unit (with the PC board, of course!). You could, I suppose, just get the board and chase down all of the parts and make your own enclosure.
On the SSM2166 mic preamp, there is a board for this as already (standalone). The following boards are available:
- SSM2166 mic preamp board. Also provides power for electret element. Takes 8 - 16VDC in
- Class H Modulator board. Can be used with a wide variety of class H output sections. Built in negative peak limiter, adjustment aids
- Pulse Width Modulator Board - with anti-aliasing filter, negative peak limiter, feed-forward. Output: TTL level PWM @ 120kHz.
- Pulse Width Modulator Output Section. Configure from 1 to 5 MOSFETs (250w to 1kw)
- Efficiency Meter / Overload Detect and Shutdown Board (nice !) [works with class H board and PWM board above, or use with your own circuit]. Shutdown senses modulated voltage to current ratio. If current rises faster than the modulated voltage, overload is detected - rig shuts down
All above are also available with parts as well as boards alone. Contact me if interested !!
Regards,
Steve