What the thread found

• The 3A arm with gold springs has a weight capacity of 70 pounds.
• The 3A arm cannot be converted to a true isoelastic design due to its inherent mechanical construction.
• Only Master series, EDTv, and Tiffen Provid arms have isoelastic designs, while G-50 and G-70 arms can accommodate isoelastic functionality.
• 3A arms exhibit pseudo-isoelastic behavior at maximum load but become progressively less isoelastic and more reactive as the load decreases.
• At full load, 3A arms require minimal effort to boom and have low reactivity, but at lighter loads they demand more effort and fight harder to return to float point.
• G-50 and G-70 arms feature user-adjustable isoelastic response that can be tuned from very isoelastic to non-isoelastic regardless of payload weight.
• G-40 arms maintain relatively consistent isoelastic behavior across their entire 12-40 pound payload range but do not allow adjustment.
• The 3A arm performs best when loaded to capacity and becomes difficult to operate smoothly with lighter payloads around 35 pounds.

Depends on

• Discussion includes anecdotal weight-carrying experiences from 2009 that may not reflect recommended practices.
• Some participants' statements about gold spring capacity differ slightly, with one suggesting 65 pounds rather than 70 pounds.
• Detailed technical specifications for G-40, G-50, and G-70 arms are based on individual user reports rather than manufacturer documentation.

Gear in this thread

Master Seriescatalog, G-70catalog

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