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A NATIONAL POWER TUBE NL-5557 / FG-17 / 715 MADE BY NATIONAL ELECTRONICS, INC. THIS IS A THYRATRON TUBE FILLED WITH MERCURY TO PERMIT USE AT HIGHER VOLTAGES SUCH AS ARE FOUND IN THE AMATEUR TRANSMITTER APPLICATION. FILAMENT VOLTS = 2.5, AMPS 5. PEAK INVERSE VOLTS UP TO 10,OOO AND PEAK FORWARD VOLTS UP TO 5,000. THE TUBE IS 6 INCHES HIGH AND 2 INCHES WIDE.

I OBTAINED TWO OF THESE TUBES ALONG WITH A GREAT DEAL OF ELECTRONIC EQUIPMENT FROM AN ELDERLY HAM OPERATOR WHO SAID HE DIDN'T KEEP ANYTHING THAT DIDN'T WORK. I HAVEN'T FOUND ANYTHING THAT DOESN'T WORK. HE SAID THE TUBES WERE SPARES. I DON'T HAVE A TESTER THAT WILL TEST THIS TYPE OF TUBE. I CHECKED THE FILAMENTS AND THEY ARE GOOD.

IF YOU WIN THE AUCTION AND WANT TWO TUBES, LET ME KNOW BEFORE YOU PAY.

SHIPPING IN THE USA BY PRIORITY MAIL WILL BE $5.00.

SHIPPING TO CANADA BY FIRST CLASS INTERNATIONAL AND WILL COST $5.00 U.S.

SHIPPING TO MOST OTHER COUNTRIES BY FIRST CLASS INTERNATIONAL WILL BE $10.76 U.S.

I WILL COMBINE SHIPPING WITH MY OTHER AUCTIONS TO SAVE YOU MONEY WHENEVER POSSIBLE.

NO PACKAGING OR HANDLING CHARGES.

LOW STARTING BID!!!!

INTERNATIONAL BIDDERS PLEASE CHECK WITH ME FOR SHIPPING COSTS.

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