As my first retirement project I am hoping to build an LDMOS amp.
I have made the decision to go with a single device, a BLF189XRBU. This is
same package as the more common BLF188, but rated at 1900 watts, The hope
to achieve legal limit, or very close, output of 1500 and with using a
single device use a single
pallet with a simpler design.
I am hoping to keep it simple with manually switched band changes and
such, and to build the LP filter and other sub-components myself.
I am however looking at purchasing the pallet itself instead of designing
and building it from scratch. I think that I am liking the designs by
4z4rb, although currently he doesn't have anything for sale, I had
contacted him and he said he had been sick. That has been 2 or 3 weeks
back and I haven't seen anything from him. I am hoping he is ok and
The W6PQL site has a lot of info and stuff available, but I'm not sure I
care for his output combiner design and the way they just sort of
SO down to my actual questions. Who would be the best pallet design /
builder / supplier
currently available? And why? with the slight higher current draw and
such does anyone foresee any real issues with my using the 189 instead of
the 188? Or should I bite the bullet and just design my own pallet from
As it is, I am just now trying to learn Kicad so that I can put
together my filters and such, but I really don't feel that I have the
ability to design the pallet itself. As it is I am looking at this as a
long term project, but I would like to complete it before I die of old age !
Thanks in advance for advice!
Don Frasher AD7LL
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