[amsat-bb] SSB 2000 damage

[Jack <vk2trf@xxxxxxxxxxxxxx>]

Hi All,

had a great time on AO51 S Band ...Until yesterday.

SSB 2000 downconverter filled up with rain.  

Forgot about antenna flipping, pointing downconverter underbelly skywards.

Upon opening it seems corrosion has been going on for a while.

78L08 to be replaced (easy)

Last active component in IF chain is marked AO1.

The schematic supplied indicates a MAR3 should be here.


Anyone know 

a) which I should use?

b) bias changes, if any, required between the two devices?

c) where to find data sheets on AO and MAR series MMICs



-- 
73

Jack Swart
VK2TRF
QF56oe
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