differences in downtube shifters
Are all downtube shifters basically the same? If I wanted to use old (from 70s or 80s) downtube shifters with a modern 9 spd group, will they be able to pull enough cable for today's cassettes (don't worry about indexing)? The only company still making downtube shifters that I could find today is shimano, but I'd rather keep my bike all campy. Can I mix old levers and new cassettes if I stay in friction mode?