Electronics > RF, Microwave, Ham Radio

Looking for "VEM 290" PA modification for 144 MHz. SP6GZZ et al.

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Uky:
Greetings.

Looking for a schematic and modification instructions for surplus PA modules using 2 x SML D1028UK transistors
to be modified for 144 MHz use. I have found some pictures and texts on the internet referring to SP4MPB,
SP2DMB, SP7DCS, OK1VPZ et al but not the documents that I have seen and mistakingly did not ask for
photo copies from. The PA is marked "VEM 290" and according to the pictures, these can easily be modified
and most likely, I can do this judging from the pictures but in order to be absolutely sure, it would be nice
to have the detailed schematic where the added components can be seen and precisely located.

Ulf Kylenfall
SM6GXV

raftronik:
Hello,
maybe here is some info https://so3z.com/?page_id=820

raftronik:
I found .pdf file with some info, but it is in Polish, I can send it to you.
I could translate to english but it take me long time.

oh4mvh:

hello,
if there is more comprehensive .pdf article available somewhere linked on that page above, I would be interested in to get a copy of that .pdf, even if it is in Polish.
73 Petri

raftronik:
Hello,
Everything I found :
https://so3z.com/?page_id=820
One link is missing but I've attached it

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