2 Sylvania 6GS7 Vacuum Tubes Valves NOS NIB Lot Of Two 6DS4 Nuvistor This lot of three US-made

This lot of three US-made number 78 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

These tubes have excellent frequency response

This gilt-edge

They were also Apex-Matched with readings very-similar to our own

6SL7s can sub for 6SN7s in some amps but I do not recommend experimenting as they have very-different bias voltages

2 Sylvania 6GS7 Vacuum Tubes Valves NOS NIB Lot Of Two 6DS4 Nuvistor This lot of three US-madeThese two new old stock, new in box Sylvania 6GS7 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 UP