WPI’s Quietest Intracellular Amplifier! BAT POW TE RY ERE D Electro 705 LE TAB POR AMPLIFIERS, ELECTROMETERS A low noise high quality intracellular amplifier well-suited for the student lab Photo shows two units arranged for differential recording. Manipulators not included. l Remote Headstage — easily mounted in any manipulator, this small probe, containing the first stage of amplification, includes a microelectrode holder, which plugs directly into the probe input. l Battery Power — Four 9V alkaline batteries (included) power the electro 705 for approximately 500 hours giving a super clean low noise source of power making the electro 705 the quietest amplifier available. Batteries can be easily tested by the press of a button. l Capacitance Compensation — Corrects for loss of rise time caused by the presence of electrode capacity. up to 50 pF of electrode shunt capacity may be neutralized. l Driven Guard Shield — Stray capacitance can be further reduced by placing the driven guard shield (included) over the microelectrode holder at the input end of the probe. l Tickler Circuit — A momentary oscillation that helps achieve cell penetration. l Electrode Resistance Test — The 705 provides a 1 nA electrode test current. electrode resistance is monitored at the 1X output as a voltage (1 mV/m). l Probe Test Port — Allows the convenience of testing the amplifier's intrinsic noise and gain without cumbersome external test hookups. Gate leakage current can also be adjusted with minimum effort. l Baseline Position Control — Adds or subtracts up to 300 mV to the headstage output, allowing artifact voltages such as liquid junction potentials to be nulled prior to recording. l Differential Output — Two electro 705s can be connected in tandem to create an optional differential amplifier probe system. SYS-705 electro 705 electrometer Probe, driven guard shield and micropipette holder MEH1SF included for glass microelectrodes O.D. 1.0 mm, 1.2 mm, 1.5 mm, or 2.0 mm. optional aCCESSoriES 3468 Dual rack mount Kit 3469 Single rack mount Kit M3301l micromanipulator (specify left- or right-handed) M-3 80° Tilting base rC1t reference cell (Ag/AgCl) 2541 Driven guard shield for 705pF probe MEH1SF microelectrode holder 705pF replacement probe (includes calibration)* *Instrument must be returned to WPI for free calibration with new probe. See cables and connectors, page 108 See microelectrode holders, page 120 See capillary glass, page 114 Reference Koch, U. (2000) “Interdependence of spatial and temporal coding in the auditory midbrain.” Journal of Neurophysiology 83, 4, 2300-2314 ElECtro 705 SpECiFiCationS INpuT ImpeDANCe OuTpuT ImpeDANCe GAIN INpuT VOLTAGe rANGe rISeTIme NOISe LeVeL INpuT CApACITANCe COmpeNSATION GATe LeAKAGe CurreNT eLeCTrODe reSISTANCe TeST DC pOSITIONING COmmON mODe rejeCTION pOWer DImeNSIONS SHIppING WeIGHT 10 Ohms, shunted by 1 pF 12 100 Ohms, both outputs X1: ±0.1% ±5 V 15 µs, 10-90% 500 µV peak-to-peak* 0-50 pF ±10 pA, adjustable to zero 1 mV/ m Ohms ± 300 mV >104 (in differential mode) Four 9V alkaline batteries, supplied 8.5 x 3.5 x 2.2 in. (22 x 9 x 6 cm) 5 lb (2.3 kg) * Full band width, with 20 M Ohms source World Precision Instruments UK: Tel: +44 (0)1462 424700 • wpiuk@wpi-europe.com www.wpiinc.com Germany: Tel: +49 (0)30-6188845 • wpide@wpi-europe.com US: Tel: 941-371-1003 • sales@wpiinc.com 73