How to design a RF power Amplifier with Specification of 200W, 1MHz - 20 MHz RF Amplifier.
How to design a RF power Amplifier with Specification of 200W, 1MHz - 20 MHz RF Amplifier.
So... You wish to generate a fixed 10MHz signal...?and a frequency of 10 MHz to that device.
no not fixed 10 MHz because I want to test 3 different devices ranging from 6 to 15 MHz.So... You wish to generate a fixed 10MHz signal...?
Note that a Piezoelectric resonator/transducer will not present a 'nice' 50+0j load --- you'll need an adjustable matching network OR an arrangement incorporating the load as part of a power oscillator's 'tank' (a common technique in high-power signal generation)
Best regards
HP
Ok then...no not fixed 10 MHz because I want to test 3 different devices ranging from 6 to 15 MHz.
Thanks, @Papabravo! --- I wanted to say the same thing - howbeit, having been thrice accused of being 'born with the silver spoon in my mouth' I was a bit 'shy' --- Seriously @Basudeb Behera we're talking pennies! Moreover, as I'm certain you realize, money is as nothing by comparison with time!If you want one for testing you're better off buying one. Cost should be in the $1200 to $3600 range. Without some RF design experience and some pricey test equipment I doubt that you could accomplish the design and construction any time soon.
Most of us were not born with silver spoons to eat our pablum. What we have learned and what we can accomplish is the result of the patient application of time and resources. Building wealth over a 30 to 50 year time horizon is doable by anyone. Doing it in a couple of weeks or months is nearly impossible. If you want to play in the electronics sandbox you need to adjust you expectations to your own reality and not throw stones at the folks who did it a different way.Thanks, @Papabravo! --- I wanted to say the same thing - howbeit, having been thrice accused of being 'born with the silver spoon in my mouth' I was a bit 'shy' --- Seriously @Basudeb Behera we're talking pennies! Moreover, as I'm certain you realize, money is as nothing by comparison with time!
With friendly intent
HP
I had something like this in mind -- However, for improved power handling and ruggedness, I'd design the circuit 'around' a pair of 4CX250Bs as opposed to 6146s...@Hypatia's Protege, can you suggest an power oscillator circuit that might be adapted to the TS's needs?
a power mosfet should be able to handle this, there are several ddesigns on the web about the irf840 in a broadband rf amp. and a higher voltage mosfet should be able to cover the power with no problems.That basic approach should do it. Have to admit that I am mystified by the -12V on the plates. If necessary, the TS could use plug-in coils to change bands.
The function of VR1, VR2 and the positive/negative 12v supply is to impose continuously adjustable -12V through +12V DC offsets upon each 'leg' of the output...Have to admit that I am mystified by the -12V on the plates
At risk of sounding the 'shill' "RF parts" should stock all that's neededAlso the TS/OP mentioned budget constraints. Finding a source of working vacuum tubes is becoming harder and harder.
Perhaps, howbeit there's no beating a 'valve' where electrical ruggedness (especially to transients/over-EMF) is required...a power mosfet should be able to handle this, there are several ddesigns on the web about the irf840 in a broadband rf amp. and a higher voltage mosfet should be able to cover the power with no problems.
...As can buying 5 duds to get one 'goodin' at a swapfestActually the guys who repair antique radios that I know prowl the hamfests for vacuum tube bargains. Buying them from a commercial source with shipping can be expensive...
I have checked everywhere, but you know its too costlier not like $1200 to $3600. Its more than $40000. Thats why only I am searching/approaching for an alternative root. If you kindly send some links where I can get the equipment with mentioned cost. It will be highly helpful for me.If you want one for testing you're better off buying one. Cost should be in the $1200 to $3600 range. Without some RF design experience and some pricey test equipment I doubt that you could accomplish the design and construction any time soon.