There are actually two different tracking force ranges quoted for the Stanton 980/981 series, and the Pickering 7500 series, depending on the version of Sterehedron stylus. For the Mk1 Sterohedron, the tracking force (for both Pickering and Stanton) low output models was 1g ±0.5g, while the MkII Stereohedron (as used on models like the Pickering XLZ-7500-IIS and Stanton 981-LZMkIIS) tracking force was 0.75-1.5g. The later specifications are given in a Stanton product catalogue I downloaded, which shows all the 785/885/980/981 models, as well as numerous other cartridges and styli – if you do a search for ‘Stanton Product Catalog’ on Google you’ll probably find it.
An experienced member on another forum has also stated that Pickering/Stanton specifications couldn’t always be trusted in their brochures and user manuals – they sometimes got them wrong (allegedly)! As one of my former colleagues, an elderly WWII veteran, used to diplomatically say, “I’m not sure that I would have said that, but because he’s said it, I’ll go along with it!”
Both Pickering and Stanton specified the recommended capacitance for their low output cartridges as being ‘up to 1000pF’. The Stanton 980/981 HZS (high output models) require 275pF for the flattest frequency response according to Stanton, as is typical of virtually all high output Stantons. They had a range of different styli, all interchangeable, which included (Stanton and Pickering equivalent models next to each other):
• Pickering XLZ-3500-E (D3500E bonded 0.2 x 0.7mil elliptical stylus) ~ Stanton 785LZE (D78E bonded 0.2 x 0.7mil elliptical stylus)
• Pickering XLZ-4500-S (D4500S bonded Stereohedron stylus) ~ Stanton 885LZS (D88S bonded Stereohedron stylus)
• XLZ-7500-S (D7500S nude Stereohedron stylus) ~ Stanton 980/981 (D98S nude Stereohedron stylus – for both HZS and LZS)
• XLZ-7500-IIS (D7500-IIS nude Stereohedron stylus) ~ Stanton 980/981MkII (D98 IIS nude Stereohedron stylus – for both HZS and LZS)
• Pickering TLZ-7500-S (T4P version of XLZ-7500-S – also uses D7500S stylus)
• Pickering TLZ-7500-IIS (T4P version of XLZ-7500-IIS – also uses D7500-IIS stylus)
The styli should all produce fairly similar frequency responses within the audio (sub-20kHz) band, although the Sterehedrons are probably better at tracking the ultrasonic frequencies (particularly on CD-4 records in good condition). The specifications certainly seem to bear that out – the elliptical stylus cartridges were specified as having an upper limit of 30kHz (that’s probably the -6dB limit, and objective reviews seemed to show they met that -6dB standard easily), while the bonded Stereohedron stylus cartridges reached 40kHz and the nude Stereohedrons got to 50kHz. The low output models all have a resistance of only 3Ω, while the inductance is just 1mH, so it’s no wonder they are immune to capacitance changes!
The cartridge bodies are all the same (within the respective low and high output groups), except for the p-mount Pickering TLZ-7500-S, which has identical electrical specs to all the other low output models, and shared the Pickering D7500(II)S stylus with the XLZ-7500-(II)S. That would have been one of the very few low output p-mount cartridges (Technics had a few) – I don’t think it had a Stanton equivalent. It also came with the brush, although Pickering does have a note in the user manual that the brush is only useable for half inch mounting applications (they supplied a half inch mount adaptor).
The method of mounting the Stanton stylus assembly is more secure than the Pickering mounting method, and the Stanton brush pivot is also slightly better than that of the Pickering stylus assembly, as those of us who’ve used both know. I’ve had problems (not unique, according to another thread) with microphonic Pickering stylus assemblies, when the cartridge body isn’t gripped tightly enough by the Pickering stylus assembly ‘wings’, although using shims to make the mounting tighter seems to cure it.:thmbsp: