How do I play super F on a Euphonium?

I can just about play super F ( F above the stave ) but it sounds really feeble and mousey.

Anyone know how to improve this e.g. practising techniques.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).