Magnum 680 pre-amp

My CB repairman replaced something he called a pre-amp (maybe a mic- pre amp?) He did great work, and this is not a complaint about him. But I do prefer the way it sounded before as I've heard on other magnum S series. I much prefer the loud low talking volume as if it was a base station <---if that makes any sense.

Any suggestions on where I can find original or was this always a faulty component?

 

I'm not sure if it was broke, but I do know the talk-back was muffled, and he said he didn't like what he seen on the scope. After he replaced it the radio was crystal clear (I should be happy right!)... No, I use to get compliments on the big radio, but now I sound like a barefoot Cobra with a really nice mic, btw range is unaffected.

A few guys I run with say it sounds nothing like other Magnums they've heard. I don't use echo and played with the modulation and power knobs. So my thinking was, did my CB guy replace the pre-amp specific to Magnum with another brand or electrical rating?

 

LMAO, the first thing he did as soon as he opened the radio he removed the modulator board... "This has got to go" I think were his exact words. But it did sound the same afterwards. It was another visit later that he replaced the pre-amp.

I don't want to name him for fear others will take what I'm trying to say as negative about his work, cause the guy truly does do a great job. I'm just at a loss of words for what I'll be asking him to replace it with when I visit again.

 

It was a single component, small and black, like a transistor.

I just looked up preamp circuits, and appears way more complicated to identify than I thought. I guess my question now should be, does anyone know where to find the schematic with component list?