Here is a circuit of a typical linear amp, the output will have to be balance with a parallel resonant circuit.
I have found that a MRF 646 would give up to 40w at UHF but will have to have some circuit changes
FlashWebHost.com - 50 Watt LINEAR AMPLIFIER.
Mike
Announcement
Collapse
No announcement yet.
None Electrolytic Splitting Of H2o
Collapse
X
-
The ZX95-200-S+ and ZX95-625A will give you the two frequencies you need and the bonus is they are variable through a wide range, total cost 87.90usd.
I will post a couple of linear amp circuits which will do for the power output, these are not so difficult to make if you follow RF construction methods, but to buy are quite expensive at UHF.
An IRF 840 can be used at VHF on its own but for UHF it may have to be staged if I can't find a power RF transistor big enough to work at that frequency.
Mike
Leave a comment:
-
No problem on frequency, keep it a 6X spacing and in the VHF and UHF bands, or HF VHF bands possibly!Originally posted by nvisser View PostIt seems like saw resonators are not the preferred choice. I also cannot find ones that has frequencies 6x exactly apart and they need to be used with a resonant circuit. They are dirt cheap though
It looks like the voltage controlled oscillators will be much easier.
K-POS 2+ kit consist of 7 kits which include POS200+ and POS765+ which will be the correct voltage controlled oscillators to use. Then we can use 100 and 600Mhz.
Mike
Leave a comment:
-
It seems like saw resonators are not the preferred choice. I also cannot find ones that has frequencies 6x exactly apart and they need to be used with a resonant circuit. They are dirt cheap though
It looks like the voltage controlled oscillators will be much easier.
K-POS 2+ kit consist of 7 kits which include POS200+ and POS765+ which will be the correct voltage controlled oscillators to use. Then we can use 100 and 600Mhz.
Leave a comment:
-
@DuncanOriginally posted by Duncan View PostMini-Circuits RF/IF Designer's Guide and UHF oscillator using Mini-Circuits' POS-400+ chip for consideration
This is the way I thought everyone should go and not ask for circuits to build as everyone would build it different and each build would have its own problems. Strangely enough, many say they can not afford to buy something that will work, yet they will spend far more than this cost trying to get their own version working.
Good Post......
Leave a comment:
-
Nice find DuncanOriginally posted by Duncan View PostMini-Circuits RF/IF Designer's Guide and UHF oscillator using Mini-Circuits' POS-400+ chip for consideration
Mike
Leave a comment:
-
Mini-Circuits RF/IF Designer's Guide and UHF oscillator using Mini-Circuits' POS-400+ chip for consideration
Leave a comment:
-
Let me indroduce something here as a cautionary statement, that some of you may or may not be aware of. I have not read the whole tread yet, so it may have been mentioned somewhere else.Originally posted by nvisser View PostIf we want to replicate this process , where do we start?
Will we use something like a AM double side band transmitter, which I think is heterodyning?
Mike suggested VHF and UHF which is in the megahertz range. TV is AM modulation.
He talks about 10W , which is not a huge transmitter.
He used the example of 100khz and 300khz which is more in the medium frequency range, but it was probably only to explain the principle.
Once we know for sure what freq. to use we could google some AM double sideband transmitter circuits. I have got old radio engineering books that I never really understood. I could have a look in there.
Then also find some wavelength formulas and work out the quarter wave lengths to get the tube lengths.
Any thoughts and ideas on this?
This was the very first explanation I found on google
SPECTRUM ANALYSIS
When working witht these high frequencies, be aware that they can be very unhealty if absorbed in your body/brain. So please be cautious with the power level and make sure your experiment is shielded from your person.
It may also be wise to have a field strenght indicator next to you, to give you warning that rf is eminating from your experiment.
Von
Leave a comment:
-
Cheap Uhf modules
Looks like there is not much we can do till we get a properly designed vhf/uhf frequency generator board
So I wonder if it will be possible to use some of this realy cheap 400mhz remote control units. They come with adjustable capacitors or saw resonators. Maybe it will be easy to modify them to the higher and lower needed frequencies of 120Mhz and 720Mhz.
If possible it should not be difficult to amplify it with a pre amp and amp as they are cheaply available on ebay
Just go search for uhf modules.
SAW Resonators
They mention that you get saw resonators from 50Mhz up to 2Ghz
Here is a site with some info on this type of transmitters.
Last edited by nvisser; 09-29-2010, 09:18 AM.
Leave a comment:
-
I would be very interested to know what frequency, frequencies or band width you were using. As you know VLF will pass through water as though it is not there and micro wave is fully absorbed by water. There is I think a band that is optimal, that was where my research was going to go so as to build a simplified RF source. For the last 12 months I have been also looking into electron beam iradiation and have had success but difficult to build and control using high vacuum and voltage.Originally posted by DrStiffler View PostI can say I believe what Mike is showing you, why, well in 2005 I did it in a different way. It was not very efficient, yet it proved it could be done. Here is one of the pictures of one of the cells, look at the gas bubble size.
If you do not want to say here please PM me.
Mike
Leave a comment:
-
sometimes they can be quite powerful and cause strange actions in a medium and then the next time display no affect at all. I still to this day have not picked out the finite factor that makes this difference.
Exactly what I was watching all those years ago!.. Take me a while to digest Now .. Thanks Doc
Leave a comment:
-
@DuncanOriginally posted by Duncan View PostA Signal Generator
HF/VHF/UHF Bandswitched Test Oscillator OK this fourier analysis HF/VHF/UHF Bandswitched Test OscillatorVHF/UHF signal generator We at least now know without doubt there is a longitudinal wave, where Its been hidden in the sums we don't know ... yet.
Good luck with this all, and Thanks Mike
.
.
I don't want to get into Mike's way here, so I will hint at something from the way I see L waves or scalar whatever we or they call them and can not cover it in depth here as the math is indeed a bit heavy and does not agree with today's science.
*First I am not at odds with larmare, I hope I'm wrong, but his credibility may be at stake here, unless his math is very convincing. I rather feel he is going at this in a far to conventional way IMHO.
Now for the L wave issue. Do you believe in virtual particles? A particle just appearing where none has existed prior?
I think Dr. Koontz Web Site of Dr. Robert W. Koontz* www.DoctorKoontz.com explains this in a very clear and though provoking way. He asks the question; 'If you have two photons in a box and each has an energy level of 1, but they are 180' out of phase, where has the energy gone?' This is a contradiction of the conservation of energy?
I do not really understand what we call scalar, it is a wild and weird thing to work with and does have its hazards as well as its advantages, although it is like the double slit experiment that are always thrown at us but can not be explained in a way the mind can image it. L waves have a habit (my work and my observations) of disappearing and reappearing someplace else and displaying the same energy without regard for what should be a degradation.
Sometimes they can be quite powerful and cause strange actions in a medium and then the next time display no affect at all. I still to this day have not picked out the finite factor that makes this difference.
Now for Mike's work, it can be viewed in a few ways and does not explain in a simple way unless you maybe look at SEC and understand what I do when I say I vibrate the medium (energy lattice), he may indeed be doing similar or I may be doing what he has taking place.
One needs to work with 180' phase shifted signal to understand what I just said here. Big problem is seeing the L wave (detectors) in a way that can be explored, then when they pass thru that door and appear someplace else it really gets hard to follow.Last edited by DrStiffler; 09-28-2010, 01:38 PM.
Leave a comment:
-
A Signal Generator
HF/VHF/UHF Bandswitched Test Oscillator OK this fourier analysis HF/VHF/UHF Bandswitched Test OscillatorVHF/UHF signal generator We at least now know without doubt there is a longitudinal wave, where Its been hidden in the sums we don't know ... yet.
Good luck with this all, and Thanks Mike
.
.
Leave a comment:
-
Thanks
Thanks Aaron. We'll make sure the word gets out on this material.
Originally posted by Aaron View Post@ Slovenia - when the document you're putting together has a bit more
for the average experimenter to start getting their feet wet, like Dr.
Stiffler's basic concept schematic or anything else to get experimenters
off and running, that doc will get to a lot of people. Send a copy to Ash
too to get out and if you or anyone is pretty good at Wiki systems, then
starting a new page on Peswiki on this concept would be a good place
to have this stuff posted as well.
Leave a comment:
Leave a comment: