Here are some reasons you should have AVA modify your ST-70:
Frank probably has
more experience than anyone else in the world modifying Dynaco equipment, having started in the 1970s, or maybe it was during the 1960s. Besides an engineering background, he has learned what modifications actually work and what doesn't work, and what is cost effective.
Consider how little of his modified equipment comes up for resale, and how quickly it generally is sold. If you were to look inside any of his modified units, even if you were untrained you would recognize the quality of the workmanship.
Also consider that he continually works on upgrading his circuitry, and offers upgrades at great prices, advancing the state of the art for each unit (His Ultra70 is based on the stock ST-70, but reuses very few of the stock parts). You'll get better sound quality from AVA modifications, as that is what he is all about.
And consider the direct access you get to him and his staff, and the great customer support they provide.
I suggest you question yourself, why would you have anyone else modify your unit?
I'm acquiring a stock dynaco st-70 and will have somebody improve/modify it. I have a AVA Tube preamp and am considering a match with AVA mods to this dynaco. In reading all the options and choices available I'm wondering why AVA mods are recommended...seems quite expensive but yet not as complete or extensive as many other mods for less money. I would like to hear from forum members who have this mod and compared it to others why I should send it to Frank for his work....thanks
dla405j