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Hickok 870 dynamic beta transistor tester, US $169.00 – Picture 0
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Hickok 870 dynamic beta transistor tester, US $169.00 – Picture 0
Hickok 870 dynamic beta transistor tester, US $169.00 – Picture 1
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Hickok 870 Dynamic Beta Transistor Tester

US $169.00

  • Van Nuys, California, United States
  • Jan 29th
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Here is a Hickok dynamic beta transistor tester in quite nice condition.  It has been partially checked out, details below.  It comes with the service/operating manual which includes the schematic diagram and parts list, and an updated roll chart that was never installed.  This is a quite versatile tester as data from the device data sheet can be used to set up the test conditions; it tests the dc and ac beta.  The user can specify the collector voltage and test current, etc.  It tests small, medium power and high power transistors. Here is what was checked.  The tubes were checked - all were strong.  The B+ was brought up slowly and it was noted that the filter caps didn't get warm which indicates little or no leakage current.  The unit uses two 6 volt Nicad batteries, a larger one rated at 200 maHrs and a smaller one rated at 80 maHrs.  Of course,  after all these years, they need to be replaced.  A built-in charge and test circuit for the batteries is a standard feature.  The charging function was checked and found to be fully operational.  The larger battery did take and hold a charge, but a little below normal voltage.  A battery test function is built in to check the battery voltage.  This all works as it should, although more significantly, it is an indication that the meter is good - not a small detail.  The interior is very clean with no burned components and it looks as though it has not had any components replaced. I strongly suspect that it will work perfectly once the batteries have been replaced and charged.  I didn't have suitable batteries at hand else I would have installed them and completed checkout.  If it doesn't sell in a few days I will get suitable batteries and complete the checkout.  Of course, the price will then be increased.  So, if you want to save a few bucks then buy it now. Please make payment within 24 hours of the auction close.
Condition:
Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections. ...
Brand Hickok
Country/Region of Manufacture United States
Model 870

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