ARLA/CLUSTER: Um "amplificadorzinho" experimental de 20 kW para VHF/UHF

[João Costa > CT1FBF]

  Power Amplifier Projects for Experienced VHF/UHF PA Builders



Important notes:

*All connections between RF parts, and also connections to ground MUST
BEas short as possible! This is VHF, not HF, in spite that design
s may looks like HF! Hi! See mechanical layout of PA designs below!*
*If input circuit trimmers, need to be at maximum or minimum capacity
during adjusting, it is necessary to change the length of the cable between
the exciter and the amplifier itself. The optimal length of the cable
should be determined experimentally to obtain adjustment with approximately
the calculated values of capacitances. This experimentally determined cable
should always be used when operating the amplifier. A change of exciter
could occasionally require a new length of cable to be determined.*

NEW !
*20 kW VHF Power Amplifier* *1 x GU36B-1*

<http://www.qsl.net/y/yu1aw/Misc/gu36b-1%2026.jpg>
<http://www.qsl.net/y/yu1aw/Misc/gu36b-1%2029.jpg>
<http://www.qsl.net/y/yu1aw/Misc/pa02.jpg>

initial and final design:

*PDF file <http://www.qsl.net/y/yu1aw/Misc/qro%20pa%20gu36b-1.pdf>*

*Built by**: Miška, YU7MS and Pali, YU7PS*
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