s a k wrote:

Hope you can help. Got a Dual 505.1 which is in reasonable nick (on an
Cambridge Audio A1 mk3), but it needs a new stylus. Its got a Ortofon
OM10 cart, but someones offered me an Ortofone/Dual TKS 49S cart for
not alot of money. Would that be a good substitute?

I'd say the easiest way would be to buy the best Ortofon replacement
stylus you can afford.