Sylvania 6C5 6C5GT Vacuum Tube Valve NOS NIB 1C7G Octal T27 Both tubes have thin cracks

Both tubes have thin cracks in their bases

This Super Silvertone 6J7G tube was tested on our Paul Hart-calibrated TV7/U for shorts

7 milliamps and transconductance was 1510 micromhos for Tube One

They have DC and BD date codes

Sylvania 6C5 6C5GT Vacuum Tube Valve NOS NIB 1C7G Octal T27 Both tubes have thin cracksThis new old stock, new in box Sylvania 6C5GT tube tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO