For Sale or trade: NOS full case 18ea RAYTHEON RK-4B31 tubes

[Crambone]

I have a case of RAYTHEON RK-4B31 NOS in original box and case for sale

$396 shipped in US only. That’s $22 per tube.

OPEN to TRADES also, things I would consider:
1) HP 8657B RF Signal Generator or equivalent working.
2) GE 6L6GC tubes NOS
3) CB Tube type radios/ amplifiers working

 

[BJ radionut]

http://www.r-type.org/exhib/aah0006.htm
Had to look those up.
Giant Diodes
Half Wave Rectifier

The 4B31 is a high power half-wave rectifier that was used for Radar.