Transistor data sheets

[Don, W2DL]

Hi everyone,

I have an Astro 102BX rig that probably has a dead final transistor. It uses a MRF 335 and a MRF 338, but I can't find any data sheet source that has these on it. The rig mfg date is 1980, so the data sheet(s) must be way back there somewhere. I want to try some newer transistors but need to find out what the parameters are for the original ones.

Regards,
Don, W2DL

[W4AMV]

Hello Don. The MRF338 per Moto was replaced by and equivalent to the MRF393. This device is in the so called GEMINI package as it has 2- matched pair of bipolar devices that are internally Z matched. It is 100W 30-500 MHz, intended for 28V operation, 8.5-9.5 dB gain. Before I scan in this data sheet, to be sure, is this the correct package for your unit? It is in a ceramic package and has 4- input, 4- output tab leads. I have an older Moto text, but need to search.

Alan