This tube was used as receiving UHF amplifier with very low noise figure at that time. My Tube Lore handbook shows more information is available in the ARRL 1961 handbook. I do have the capability to test this tube in my TV-10D transconductance tube tester if one desires.
I do combine items when and if possible or practical.
I Guarantee All My Items To Be As Listed & Described
My Items May Be Picked Up By Arrangement: No Fee
I usually ship immediately upon receipt of payment.
Enjoy your bidding!
LOCxGUGA