FS: excellent calibrated Hickok 6000a tube tester, good Hickok 539c alternative at much lower price
Mike Schultz wrote:
Most nice 6000A's bring between $200 and $300 on the well known auction
site.
You're right-in no way is this an alternative to the 639C (or any of the 639
series, for that matter).
It has one serious drawback that you didn't mention. Most Hickok designs
allow you to reset the line voltage while the tube is under test. This
allows you to compensate for the added load and consequential drop in all
applied voltages (filament, plate, bias, and screen).
The 6000/6000A testers specifically do not allow this.
Maybe somebody should've bought that "toy" from last week.
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