Cartridge Type The FROG ® Unit
Stylus Replacement Available see (*)
Stylus Shape VDH - IS
Stylus Radii 2 x 85 Micron
Frequency Range 5 - 55.000 Hz
Tracking Force 13.5 - 16 mN
Static Compliance 35 Micron / mN
Tracking Ability at 15 mN at 315 Hz 70 - 80 Micron
Output Voltage at 1 kHz at 5.7 cm/s eff. 0.65 mV RMS
Channel Unbalance < 0.3 dB
Channel Separation at 1 kHz/10 kHz >35 / >30 dB
Equivalent Stylus Tip Mass 0.32 Milligram
System Weight 8.2 Gram
Vertical Tracking Angle 22 Degrees
Optimum Load Capacitance see (**) pF
Recommended Load Impedance 500 (> 200) Ohm
Recommended Eff. Tone arm Mass 6 - 10 Gram
Moving Coil Resistance (per channel) 21 Ohm
(*) : Stylus replacement and other services available on request
(**): Non critical
Related Articles & Papers:
“KISS ME and I'll MAKE MUSIC”; In this review Walter Fuchs characterises our top level The FROG ® MC phono cartridge and adds some humorous comments on its colour. Translated from German magazine Hörerlebnis, issue 30.
“Van den Hul FROG phono cartridge”; In this highly informative article Wes Phillips reviews our top level The FROG ® moving coil cartridge in all its aspects. A review from Stereophile, July 1997.
“Van den Hul The FROG”; This short, though informative review discusses our top level The FROG ® phono cartridge. Translated from German magazine Image HiFi issue 5/’96.
“2,500 Clams for a FROG!”; In this comprehensive article Steve Guttenberg discusses our top level The FROG ® phono cartridge. A review from Listener Magazine, winter issue ’97.
“The King of FROGs”; This short, though informative review discusses our top level The FROG ® moving coil cartridge. Translated from German magazine Stereo, issue 12/’98.
“I left my heart in some FROG’s disco”; Another interesting review of our The FROG ® moving coil phono cartridge appeared in Play Magazine, spring issue ’97.
Our PHONO FAQ: A.J. van den Hul has written down his answers to the questions most commonly asked to him during the years. A very comprehensive “question and answer styled” list which treats phono replay, cartridges, turntables and nearly all matters related is the result. Both the novice and experienced record enthusiast will come across many points of interest here. Well worth browsing through...
Stereophile’s DUTCH MASTER interview with cartridge and cable designer A.J. van den Hul, introduces you to A.J. van den Hul’s succesful philosophy in cable and cartridge design. Furthermore many aspects regarding his METAL FREE interconnects and GRASSHOPPER phono cartridges are discussed.
“The DUTCH GAUL”; In this extensive interview with A.J. van den Hul many ideas, backgrounds and aspects regarding the manufacturing, use, rebuilding and repair of PHONO CARTRIDGES are discussed. From Hörerlebnis, issue 30.
Hi-fi News & Record Review’s A VAN DEN HUL PROFILE interview, though dating from 1990, provides excellent background information on van den Hul’s patented LINE-CONTACT PHONO STYLUS, its invention and philosophy. Furthermore, van den Hul’s AUDIO CABLE PHILOSOPHY is discussed in detail.
“HOT TIPS”; This interview, though dating from 1984, provides excellent information regarding A.J. van den Hul’s theories on CARTRIDGE DESIGN and an expansion of his views on the RE-TIPPING of CARTRIDGES. Furthermore, pictures of various stylus tips are shown. From New Hi-Fi Sound, February issue 1984, page 99-101.
“The CANTILEVER TALES”; An appraisal of A.J. van den Hul’s PHONO CARTRIDGE REPAIR / REBUILDING / RETIPPING SERVICE; “If you love analog, you can breath never-before-available life into a good old (or new) classic cartridge”. The August 2000 issue of Greg Weaver’s past “Synergizing” column from SoundStage! online magazine.