Have YOU blown your HP8555A Mixer assembly ?
Can't afford to buy another Plug In ? Can't find a good replacement Mixer Assembly ?

Here's an article on how you can "restore" the functionality of your Plug In.

And another site of interest :

Please Note : This mod will NOT restore your Spec'y to it's original Spec's ... but it is at least an alternative.

Acknowledgments:   RSGB Microwave Newsletter, Peter, GM4DTH for taking the photographs & Kent Britan WA5VJB, North Texas Microwave Society - for the Master article.
 

Do you have any Hints/advice/repairs etc. that the Amateur Radio world should know about ?
Send them to me & I'll Post them here !
 

Other Links & WEB sites will be added shortly.