3 RCA 1S4 Vacuum Tubes NOS NIB Lot Of Three July 08 2025 This RCA 807 output tube

This RCA 807 output tube was tested with adapters on our Maxi-Matcher 2 for shorts

35 and 42 where minimum (65%) is 26 and 100% is 40

This lot of three National Union number / type 58 stamped- / engraved-base tubes was tested on our Paul Hart-calibrated TV7/U for shorts

meaning it was made at the Philips plant in Heerlen

3 RCA 1S4 Vacuum Tubes NOS NIB Lot Of Three July 08 2025 This RCA 807 output tubeThis lot of three new old stock, new in box RCA 1S4 tubes 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