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I use the 636 an my Comanche Blackhawk which is the clone of the 257 and it works great. With the amount of audio I was able to get out of my radio it was the perfect choice.
73's
fasteddy
CDX-765
High Country DX, HF Specailist. Del Norte, CO
contact me at pe765@aol.com
Keep in mind these radios along with all Magnum radios are very bassy. The RK56, D104, 575, and 2018Xtreme are all compatible, as well as (if you can get one off ebay) old Shure mikes. Just so you know the Shures sound excellent on the new Mavericks.
Please advise me to what is a good replacement mic for my SR-497HPC... Answer: 497 is "wired like Cobra", so many choices available. That radio does not need a power mic, so purchase a stock "coffin style" mic with a decent cord, like the ones that Astatic uses. The Superstar DM-507 is my go-to. https://www.ebay.com/itm/3050474478...adANq91JSiEEnz8EGqPJRBloTgEyaVsBoCtoMQAvD_BwE $12.99 + .99 cent shipping.
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