I suggest that I can probably get away with putting the plate and filament supply for the modulator on one side and the filament, bias and screen supply for the final on the other.
Mike,
Consider using an autotransformer across the 240V balanced feed. Then use the CT as a local Neutral. This way all your loads will be balanced outside the rack. You can often pick these up surplus. Alternatively the 240/120V step up/down transformers available for powering overseas equipment could be used similarly. The Frye's chain usually carries several options.
Here is one option, the Hammond 170GE 1500VA autotransformer:
http://www.hammondmfg.com/pdf/5c0073.pdfDigikey:
http://parts.digikey.com/1/parts/997092-transfrmr-auto-115-230vac-1-5kva-170ge.htmlEpay:
http://www.ebay.com/itm/Hammond-170GE-AutoTransformer-/230760162695?pt=BI_Circuit_Breakers_Transformers&hash=item35ba60a587#ht_1947wt_1181Here is a 240V to 120V 500VA stepdown transformer for 50 bucks:
http://www.frys.com/product/3696575?site=sr:SEARCH:MAIN_RSLT_PGBesides all the complexity with the 60 HZ ground current, loops etc. and the NEC, what about RF ground loops? Is this best a topic on another thread, or can George's thread handle this as well?
Jim
WD5JKO