Pye pre-amplifier type HF-25A for the Pye HF-25 valve amplifier. Control unit

  

This is the control unit for the Pye HF-25 valve amplifier. It can connect directly to a Pye HF-25 amplifier via the octal socket or, if preferred, an octal wire can be used (although this is not included). Various cosmetic issues - see photos.