of the metal-cased coil assembly fitted onto a 1/8" steel rod (called the pressure rod by the manufacturer), itself mounted parallel to the guitar's strings a short span away from the sixth (or "low E") string; this allowed the player to adjust the pickup's location for preferred tonal character and for minimal interference with performance. The end of the pressure rod was clamped across the strings between the guitar's bridge and tailpiece assemblies. The configuration was soon nicknamed "monkey on a stick" because of a resemblance to a popular child's toy of the era. As with the RH model, the FH could easily be installed and removed without modification (or damage) to the instrument. Later, an option was offered with a shorter pressure rod intended to be attached to the side of the guitar's neck with two small screws; this provided less interference with the guitarist's right hand as well as an aesthetically "cleaner" appearance. Each pickup models was offered in a variant — the RHC and FHC respectively — that had a volume-control potentiometer. The FHC-B has a twelve-foot cable but no volume control, being intended for use with a volume pedal. The FHC-C had a volume control (potentiometer) in a small box on the cable, ten inches from the pickup. The pressure-rod pickup design originally used an output cable with a threaded female connector on one end and a 1/4" plug on the other, a common configuration for high-impedance microphones of the era. The connector (Amphenol 80-75-MC1F, Switchcraft 2501F) had a knurled coupling ring, which allowed the fitting to attach to a corresponding male-threaded connector on the volume box or "module" which completed the signal path to the amplifier. The plastic insulation of the cables became stiff or brittle with age, prompting players to repair or replace these themselves in order to keep using the pickup. Eventually, DeArmond replaced the one-piece (twelve-foot) integral cables and the threaded connectors with a 1/8-inch phono jack on the pickup and provided an 1/8"-plug-to-1/4"-plug cable. The Rhythm Chief DeArmond introduced model 1000, the Rhythm Chief archtop guitar pickup, in 1948. This was followed late 1953 by the model 1100 Adjustable Rhythm Chief with individual polepiece screws and a fancier look (chrome plating, and later, gold plating). The 1100 was presented to the public along with the introduction of the 210, the adjustable-pole soundhole model. Tap-style guitar To promote the sensitivity of his