Variation (long life):
Split stock solution for very long life (Muir)
Solution A
Sodium sulfite (anh) 40 g
Sodium bisulfate 10 g
Hydroquinone 11 g
Phenidone 250 mg
Glycin 11 g
WTM 1 l
Solution B
Sodium carbonate (mono) 80 g
WTM 1 l
Dilute 1;1:1 for use. Add potassium bromide or benzotriazole as needed.
(Ref: Photo Techniques, Sep/Oct 1996, pg 55)

Variation (PC130):
Water (52C) 750 ml
Sodium sulfite (anh) 50 g
Ascorbic acid 18 g
Sodium carbonate (mono) 78 g
Phenidone 500 mg
Glycin 11 g
Potassium bromide 5.5 g
Water to make 1 l
pH (measured) = 10.1
This looks a lot different than Ansco 130, but it is really very close to the original formula. Ascorbic acid replaces hydroquinone in about an equi-molar proportion, and phenidone replaces metol. Phenidone is not quite as superadditive with ascorbic acid or glycin as it is with hydroquinone, and the amount was adjusted accordingly.
Dilute 1 + 1 for use. Develop for two and one half minutes.
Based on emergence times, the PC130 appears to be considerably more active than Ansco 130, but it gives slightly slower paper speeds. The difference is about a third of a stop for the Forma paper, nearly a quarter stop for the Ilford, and almost none for the Kodak.

Note that PC-130 does not have any chelating agents to prevent sudden death. Addition of appropriate amounts of succinic acid and triethanolamine may be helpful.