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1. the balun has to be less or equal of 1/8 wavelength at the highest frequency of the intended working frequency bandwidth. In this case it is a 25ohm coax, so it transforms the 50ohm to 12.5ohm at its unbalanced end. Bending is not to save space but to be able to have the opposite curve...
Yes, it is possible. You need to “modify” the transistor with a series or parallel feedback. Usually for the purpose the series feedback technique is used because the parallel one will bring much worse instabilities. You have to use an inductor (or a high characteristic impedance line) in the...
You should go to www.ampsa.com, get the contact info from there and ask for quotation. There are a lot of variations and options. But let's say about $20000 for full capabilities. If you design amplifiers regularly you’ll not regret having the software.
First of all you can ask Eudyna to supply you with more data for the transistor you have chosen. For some of their transistors they have load-pull impedances data and if you are insistent enough and if they decide that you’re important for them they can provide you with more data.
I have some...
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