Mini-Mod MW 'Micro Transmitter'

[Terry]

It would be rather nice (well I think so anyway), to have a  design for a micro-transmitter that uses valves, along the lines of those ubiquitous Chinese 'Little Bear' valved headphone/pre-amp amplifiers.

A bit like this sort of thing. They run in 12V and I assume they have a tripler or some such thing to raise the voltage for the HT:

At the bottom of the page you linked to is a "Mullard Vintage Valve Buying Guide" which contains, amongst other things, this priceless piece of advice:

'Vintage amplifier valves tend to generate enough heat to degrade other stereo system components. Because of the excessive heat, Mullard amplifier valve buyers should place the sound systems in a large room that encourages strong airflow, such as a basement with includes several open windows.'