HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 0

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 1

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 2

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 3

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 4

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 5

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 6

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 7

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 8

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 9

HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AMP HI-FI TESTED AGAINST 539C, US $299.00 – Picture 10

Hickok 600a Dynamic Mutual Conductance Tube Tester Amp Hi-fi Tested Against 539c

US $299.00

Louisville, Kentucky, United States
Jan 29th

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***DESCRIPTION*** Here's a decent Hickok 600A tube tester I have used for several years testing only some simple guitar-amp tubes: 6L6, 12AX7, 12AU7's.... etc. I'm only selling it because I recently bought a calibrated 539C tester. It would continue to serve it purpose well as a "service tester" - determining if tubes are shorted, and a general good vs bad idea if a tube is usable or not. I would not rely on it for matching tubes or for selling tubes based on a specific Gm output..... I would question it's accuracy. It could probably be calibrated though to achieve more accurate results (it's never been calibrated to my knowledge). In fact, just to see how it compared.... I tested 2 of the same tubes both on this tester and my recently calibrated Hickok 539C. The tubes I checked were a 12AU7 and a 6L6. Here's how they compared: 6L6 ---- on this 600A = 4,300 Gm 6L6 --- on 539C = 5,750 Gm (where 539C says Min. for 6L6 is 3,300) 12AU7 ---- on this 600A = 1,900 / 2,000 12AU7 ---- on 539C = 2,600 / 2,700 (where 539C says Min. for 12AU7 is 1,950/1,950) So based on these readings it looks like you have a conservative margin for error to your advantage on this 600A (assuming the 539C is accurate). Both of these tubes read well into the Green "Good" range on the 600A at that. Also, a new power cord has been installed recently. It has a grounded-plug but the ground wire for some reason is not attached. So, I imagine it could still be attached and grounded if so desired. The tube-data chart does not roll properly when installed in the tester - it binds. If you remove it from the tester you can get it to reach both ends of it's chart though with no problem. For the time I used it, I just kept it out of the tester for that reason. This tester will ship completely assembled though as seen in the first 3 photos. One more thing, the plastic lens that goes in the window for the tube chart is missing. The photos are of the actual tester you are buying, let them speak for themselves. Although I have tried to accurately describe this tester, it has NOT been thoroughly tested and is a vintage piece of tube equipment, therefore it will be SOLD AS IS. The cabinet is in average condition with normal wear and tear. ***SHIPPING*** Please ask any and all questions before bidding. FREE Shipping within the Continental US. Worldwide shipping is through eBay's Global Shipping program. Or, if not eligible for the Global Shipping program, I will still ship worldwide via USPS Express International mail for a flat rate of $150. Payment is due within 24 HOURS of the auction close via Paypal. Note to international bidders: I cannot mark the item's declared value for anything less than what it sells for, so please don't ask.