These are 4 GE 7591A tubes. If I'm testing them right, they are all registering 75%. The boxes are dirty.

 

100 PIECES TYPE 6AK5 / 5654W ROUND GETTER PENTODE TUBES MADE IN THE USA GREAT FOR AMPLIFIER BUILDER PLEASE ASK ABOUT OUR OTHER NOS NIB TUBES FOR AMPLIFIERS.. WE HAVE OVER 100,000 IN STOCK SELLING OUT

 

Pristine on the outside and minimal wearing around the interior cones. No cracks or splits. Beautiful solid wood cabinets make these a fabulous showpiece. Due to the all screw construction replacing c

 

This auction is for 1 pcs NOS NIB 5U4G U52 CV575 GEC 1950's, made in England, a full-wave high-vacuum rectifier. It comes in an original box. In this case better than NOS as this tube comes from the S

 

Here for sale is a:   Vintage Old Engineering calculator. It is complete and in a  case, my father used one of these to do calculations to create structural steel construction drawings. It appears t

 

~ Vintage Exactra 19 Calculator by Texas Instruments ~~ Orange faceplate in Working Condition ~ This Calculator works and would make a Great Collector Item. It has an on & off button & has fou

 

This is a Heathkit speaker, Model No. SB 600, primarily used as an external speaker for Ham radio set-ups. It has been tested and is in good working condition. There is some scuffing in the paint. I h

 

McIntosh Mc225 Tube Power Amplifier. Serial #519C3. This is the legendary McIntosh 225 Tube Power Amplifier. Touted to be the most sophisticated of the McIntosh line. It delivers a good punch churning

 

ORIGINAL VINTAGE 1957 service manual for the vintage Tube-Powered RCA Victor 6-XF-9 Series AM-FM Radio Receiver. Chassis RC-1121B, RC-1121C This Manual is in good usable shape and is still fully intac

 

Beautiful example of the rare Philips tube preamp made in 1963. The unit is in pristine condition, it looks and sounds beautiful!! The wood cabinet along with the glass face are in excellent shape. Ev