I recently bought an HRO-Senior with a power supply that does not match that
receiver type.

It probably is the companion of a more recent HRO version, or of another
receiver though probably still National.

Can anybody help me to identify it? It can be seen at
http://www.qsl.net/i0jx/power_supply.jpg The Rectifier tube is type 80.

Thanks & 73

Tony I0JX,
Rome Italy