[Heathkit] Info needed - HR-10B replace V5 6BJ7 with 1N4148 diodes modification

[Howard Weinstein K3HW via Heathkit]

Heath Gang,

I would like to perform the the modification to an HR-10B that replaces V5, a 6BJ7 with three 1N4148 diodes. 

Can anyone refer me to a procedure with a schematic or photo that details this procedure.

Tnx es 73 de Howie K3HW