80 METER CW 3-PACK FOR OLD BOATANCHOR TUBE TRANSMITTERS (HC49/U CRYSTALS)

Description

YOU ARE PURCHASING ONE LOT OF THREE 80 METER CRYSTALS IN USED FT-243 STYLE HOLDERS. ONE EACH, 3535, 3560 AND 3580 KHZ FUNDAMENTAL FREQUENCIES. THESE HAVE THE LARGER, HIGHER POWER VERSION OF THE HC49 CRYSTALS (HC49/U).
I SIMPLY REMOVED THE OLD OUT OF BAND MILITARY CRYSTAL ELEMENT AND SOLDERED IN THE HC49/U TALL VERSION OF THIS WELL KNOWN QRP CRYSTAL, WHICH CAN ALSO BE USED IN MANY, IF NOT MOST OF THE OLD BOATANCHOR TUBE CIRCUITS. I HAVE LITERALLY SOLD MULTIPLE HUNDREDS OF THESE OVER THE YEARS, WITH GOOD SUCCESS.
AS YOU CAN SEE IN THE SECOND PHOTO THE TALL VERSION IS MORE THAN 3X THE SIZE OF THE SMALLER HC49/S AND CAN HANDLE MORE CURRENT. WHEREAS THE SMALLER HC49/S CRYSTALS WILL SOMETIMES WIMP OUT, THE TALLER VERSION TYPICALLY PERFORMS JUST AS WELL, IF NOT BETTER THAN A STANDARD CRYSTAL WITH THE ORIGINAL FT-243 ELEMENT.
I'VE USED THESE 49/U TALL CRYSTALS IN MY LITTLE 15 WATT SINGLE TUBE 50CD6 SWEEP TUBE HOMEBREW TRANSMITTER. IT RUNS ABOUT 85 TO 100 MA PLATE CURRENT AND THESE CRYSTALS WORK GREAT, NO ISSUES.
THE FREQUENCIES, AS MARKED, ARE APPROXIMATE AND MAY VARY PLUS OR MINUS 1 KHZ, DEPENDING ON CIRCUIT LOADING.
SHIPPING TO THE UNITED STATES ONLY.