You ask Don't they use the Ramsey preamp on those conversions?
The Custom Repeater Builders who Run this Group are very Flexible They will Build You What You want and What they Recommend, It’s Your money You get what You pay for, So I just left it up to the Pros. I already had the advanced research preamp In a Hamtronics Repeater and it was needed, But sent it in for Scott to install with the Micor Job. He stated it was the hottest 220 Micor mod Receive He had ever did. And it did not even need the Preamp but I went ahead and had it put in. Happy Repeater Building Don KA9QJG

