Philco 12S8 12S8GT Vacuum Tube Valve NOS NIB

Philco 12S8 12S8GT Vacuum Tube Valve NOS NIBThis new old stock, new in box Philco 12S8GT 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

5 out of ten with only a minor tick or pop and only in the quiet passages

an engraved base and terrific flashing

(New US-made 6550s typically test with plate current from the low 20s to mid 40s with transconductance from 3500 micromhos or so

I am playing them in my Mini Mite 2013 and they sound super

There were no shorts or gas and they measured 45/45

RCA Living Stereo

Transconductance measured 7240 micromhos for Tube One and 7270 for Tube Two

For sale is one new old stock

61 and 66 where minimum (65%) is 45

new in box milspec (US Navy) Raytheon CRP-78 number / type 78 tube tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-testing Svetlana 6550C / 6P27 perforated plate output tube was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -48 volts for shorts

Philco-BRANDED 6R7 tested to spec on our Paul Hart-calibrated TV7/U