EICO 235 Professional VTVM
20 ranges with 25 meg DC input.
1% multiplier resistors.
Protected 6" 200ua meter with zero-center scale.
Ranges: p-p volts 0-4-14-42-140-1400-4200
DC rms volts 0-1.5-5-15-50-150-500-1500 (plus 0.5v DC range)
Ohms 0.2-1000 megs in 7 ranges
Response: 30Hz to 3MHz
Cabinet Size: (HWD) 8 1/2" X 7 1/2" X 5"
Weight: 9 lbs
Surplus Sales of Nebraska -- EICO 235 Manual :: $16.00http://www.surplussales.com/Manuals/man_eico.html
EICO 232 VTVM Construction Manual (BAMA Mirror)http://bama.edebris.com/download/eico/232(3)/Eico%20232%20assembly%20man.pdf
EICO 232 VTVM Instruction Manual (BAMA Mirror)http://bama.edebris.com/download/eico/232(3)/Eico%20232%20user%20man.pdf
Construction Manual for the EICO 232 Peak to Peak VTVM
with the revised Schematic for the new switch PN 6006.
David R. Lane, AC7PQhttp://bama.edebris.com/download/eico/232(2)/EICO_232cm.pdf
EICO's probe is called: UNI-PROBE
The probe has a switch with TWO SETTINGS: DC; AC-OHMSThe UNI-PROBE has a 1 Mohm 1/2-watt resistor in-line with the Hot test lead,
and a switch to bypass that resistor.
Probe connector to EICO 232 is Switchcraft 2501F, readily available from Mouser.Classic guitar, microphone, and PA amplifier restorers still use.
YouTube restoration of an Eico 232 VTVM (Dec. 2012)http://www.youtube.com/watch?v=5_Z3h_OpoQw
The original EICO test probe has a set screw -- (eHam.net posting), to keep the coax cable,
from backing out of the probe body. Over tightening that setscrew can be shocking.http://www.eham.net/articles/7682