Hickok 800a Mutual Conductance Tube Tester - No Need For Ca-4 Or Ca-5 Adapter*

US $521.88

Kirkland, Arizona, United States
Feb 24th

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Hickok 800A Mutual Conductance Tube Tester - No Need for CA-4 or CA-5 Adapter* Hickok 800A Mutual Conductance Tube Tester Calibrated and in Excellent Working Condition All Voltages Within SPECS that can be seen in the pictures below. All tests were done with the correct shunt resistor to duplicate 1,000 Ohms/Volt Meter per Shoo Calibration Specifications. Picture 3 shows the AC signal voltage 2.409 SPEC is 2.5 +- .2 Picture 4 is the plate voltage of 152.6 SPEC is 150 +- 5 Picture 5 is the screen voltage of 130.5 SPEC is 130 +- 2 Picture 6 is the low screen voltage of 54.5 SPEC is 56 +- 2 Picture 7 is bias voltage at 100 which is -40.7 SPEC is -39 +- 2 Picture 8 is bias at 22 which is 3.149 SPEC is 3.3 +- .2 Picture 9 shows the filament voltage with the tube in the socket at 6.10 which there is no SPEC for in any Hickok manuals, but critical to get accurate test results. Many Hickok testers can be calibrated, but the heater voltage drops below 6 volts when a tube is in the socket causing inaccurate test results. Picture 10 shows a 6L6 calibration tube with Gm of 5475 being tested with accurate results, but does not line up with the 6K red dot on the shunt dial. The mark is at 86 1/2 and should be at 85 or a little above 85 as seen in picture 11. The 3000 mark should be at 31 as seen in picture 12, and the 15000 should be right on 93 as seen in picture 13. Close up pictures of the dial can be seen below as to where the dial should be marked for accurate calibration. No marks were made on the English/Shunt dial, but according to Hickok's calibration procedures, a new mark should be made on the dial for calibration. The marks are not very far off and any new marks made on the dial will be up to the buyer. The 5y3Gt is Hickok labeled and tests as good as new, and the 83 is a NOS JAN RCA, and both are well balanced. The tester has the original cord which is in great shape and pliable. Please look at the pictures and ask any questions. The tolex is in OK shape and the case is solid. The tube charts is dated 1964 and works end to end. This tester can test most tubes and there is no need for a CA-4 or CA-5 adapter. The 800A can test from the old 4-pin to the Compactron, and everything in between. The sockets and the tester appear to have been used little and the previous owners name and SSN was sanded off in the lower right hand corner. Information including calibration procedures from Daniel Shoo, and updated tube data and operating manual are readily available at no charge at Bama and elsewhere. Please ask any questions and look at the pictures for details. Must read and agree to terms below: Please note and understand that there are no returns on this tester, all sales are final. If you have an issue upon receiving please notify me immediately. This tester is at least 45 years old and should last another 50 if used and maintained properly, but if directions are not followed and someone tries to test a shorted tube e.g., any tube tester can be destroyed in a second. I cannot be held responsible for someone's error. I do however gurantee you get exactly what is pictured and as described. We have a 6000A for sale as well that will not test the older tubes as it is, but can with a different tube plate such as the one on the 6000, and it is really nice and about as perfect as you can get. We warrantee and represent that the goods are as described in the above listing. We specifically disclaim any implied warranties of title, merchantability, fitness for a particular purpose and non-infringement. Customers should satisfy themselves that any item choice made is suitable for their intended purpose or use. If an item is sold with no returns accepted as its terms then we will not accept returns on that item unless we made an error in the listing. Genuinely faulty goods will be replaced or money refunded, however we must be advised of any faulty goods upon receipt of the item. It is the customers responsibility to pay for and ship the item back to us. If the item is found to be faulty, we will also refund the postage cost. Most of the items we sell are vintage and for this reason returns are not generally offered.

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.
Seller Notes	“Excellent Working Condition with PICs of voltage Specs and Calibration tube being tested. Tests about every tube with no adapter needed.”