The AM signal and how it works. Carrier and modulation

nav

Re: The AM signal and how it works. Carrier and modulation
« Reply #29, on October 5th, 2019, 04:22 AM »
You remember this circuit guys which I built? The reason their is no DC bias and not enough voltage is because I didn't run the resistor across the choke and have enough current flowing through it at the carrier frequency. The system was working the way it should have done but there were just a few mistakes related to frequencies, diode type and resister positioning.

https://www.youtube.com/watch?v=RTbp0D_5Khc

Earl

Re: The AM signal and how it works. Carrier and modulation
« Reply #30, on October 9th, 2019, 11:56 AM »
Thanks Nav

 I was wondering about adding resister to system because I remember Stan stating, in one of the videos I think, that adding resistance to system would violate his patent.  Stuck in back of my mind as I wondered why? 

Earl

Re: The AM signal and how it works. Carrier and modulation
« Reply #33, on October 19th, 2019, 12:15 PM »
Nav,

Just wondering if you can just use capacitors in this testing instead of a water cell?

I built Stan's control circuits to see what they did. I have finished those and plan on starting to work on coils and cells.  I would like to avoid building cells at first if I could hence the questions about using capacitors.

As far as I can tell without having the VIC and cells, Stan's control circuits generate an AM  type wave in 50Hz range also a 5KHz carrier also is in range.  So the output his control circuits is very consistent with what you are reporting here.  I had started building those circuit as I was not sure how to test and tune the coils. Your explanation in here is a great help as it provides a why to do that.

I have been following your other posts and was glad to see you still working on this. I also believe using your method makes testing and understanding the coils easier to do.  The controls in Stan's circuits are extremely touchy and a change in one area requires you to make a change in another area and without knowing what you are trying to accomplish makes setting it up correctly very difficult.

On other thing I noted was I could not see anywhere in his control circuits a method to change the voltage across the coils except a switch to connect directly to a 12 volt source. When this is used much of his control circuit is by passed.  Ronnie mentioned in one his post voltage was stepped up using by raising frequency.  My guess is systems limits may be determined by using method similar to what you are doing. Then this information is used to setup the control system to stay within those limits.

Ronnie also stated that changing gap in core was to do a ruff phasing adjustment which agrees with you statement above.

Nav would it be possible you to provide what equipment you are using to drive the coils?  I am starting from scratch so that information would be helpful.

Earl

securesupplies

Re: The AM signal and how it works. Carrier and modulation
« Reply #35, on December 28th, 2019, 01:00 AM »

 Happy New Year Nov 2020

Re this   I was reviewing this yet again and looking close again ,

So is this correct to say there are 2 frequeenciees going into the primary and onee is auto adjusting ?

Dan


Earl

Re: The AM signal and how it works. Carrier and modulation
« Reply #36, on January 5th, 2020, 04:13 PM »
Dan from testing I have done so far that is correct.  The AM carrier frequency does not change it goes into one side of the primary transformer.  The modulation frequency does change and it go into the other side of the transformer.  The other thing that does change is the gate size which controls the number of modulation pluses on each AM pulse.