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> Ham radio hp 410C vtvm, solid state version
Ham radio hp 410C vtvm, solid state version
This unit has the A6 (calibration) board modified to update the calibration potentiometers to 15 turn Bourns trimpots. Calibration is smooth and with much higher resolution available as compared to the stock single turn HP potentiometers. External panels and meter "brow" re-painted. Panels repainted Olive, meter "brow" painted Light Grey. Computer style AC cord connector installed (some units used a HP oval connector), AC cord set furnished as part of sale. Unit is NOT checked for 220VAC operation.
No photo-chopper to cause shakey needle, sluggish readings, no vacuum tube to cause drift and heat, No high voltage components to burn up, no warm up time. Very low drift over time, low power comsumption, no heat buildup. All this and more with the solid state 410C.
Unit is operational, repaired and calibrated using the HP Lab AC/DC Calibrator designed for this family of analog meters.
Serial Number of the unit you will receive is 532-04017. Photo shown with all cables and HP AC Probe, is of the exact unit you will receive.
These instruments are lab-grade, easy to use and repair. They are rugged, accurate, have a design 100megohm input impedance, which makes them teriffic for low level signals and measurements that are not accurate unless very lightly loaded (receiver AGC/AVC lines come to mind). They are just as useful in the ham shack as the lab or the classroom . The RF (AC) Probe (useful to 700mhz) is perfect for low level signal tracing in oscillators, mixers, and transmitter and receiver RF circuitry of all kinds. The bulk of the cost of this instrument is the active RF probe,whether the HP or Militarized versions. The cousin of this instrument, the HP 410B, while not nearly as modern looking, has a design input impedance of 122megohms, ( and an active RF Probe as well) , making it a great lower cost alternative to the 410C.
We can supply the little "spring gizmo" that is used to connect the tube top pin with the nose of the probe housing. We can supply replacement triax-cable when the HP triax on your instrument fails. Email for details.
We provide after sale technical and parts support ,via email, for all of the units that we sell and for all that are listed on our web page. Technical questions about vacuum tube test equipment, parts, repairs and useage ? Email us.
We repair/refurbish : URM 25/26, HP 410B,C, HP 608 family ,HP200CD, Simpson 303,TS510 (608D military version).
Our information page: http:// /kiss.electronics/index.html
