I have a pair of Eico HF 20 output transformer which are 20 watt and about 6.6k so i was thinking that 5881's would be a good choice . I also have the original power transformers from the HF 20's so B+ should be just about right . R30 the 200K will have to be adusted and maybe the cathode resistors .
Are any other changes needed to eclone boards