The Number Of The Beast Robert A Heinlein Fawcett Columbine 0-449-90019-3 GM Delco This new old stock-testing matched

This new old stock-testing matched pair of RCA 12B4 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 45/40 while Tube Two measured 52/50 where minimum (65%) is 40/40 and 100% is 62/62

Their readings are 48

Shipping Credit: $64

They struck at 35

The Number Of The Beast Robert A Heinlein Fawcett Columbine 0-449-90019-3 GM Delco This new old stock-testing matchedThis soft cover book is in good condition. The spine is in fine shape with no loose pages. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250 IN VALUE. IF AN ITEM IS MARKED "DELIVERED," AND YOU HAVE NOT ACTUALLY RECEIVED IT, THE FIRST STEP IS FOR YOU TO CONSULT YOUR MAIL CARRIER TO GET THE EXACT COORDINATES OF THE DELIVERY AND ARRANGE FOR YOUR ITEM'S RETRIEVAL. IF IT APPEARS