NEW OLD STOCK MFG. DATE 1973 RCA 931-A NINE STAGE PHOTOMULTIPLIER VACUUM TUBE For Sale

NEW OLD STOCK MFG. DATE 1973 RCA 931-A NINE STAGE PHOTOMULTIPLIER VACUUM TUBE
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Buy Now

NEW OLD STOCK MFG. DATE 1973 RCA 931-A NINE STAGE PHOTOMULTIPLIER VACUUM TUBE:
$12.99

NEW OLD STOCK MFG. DATE 1973 RCA 931-A NINE STAGE PHOTOMULTIPLIER VACUUM TUBE


NEW OLD STOCK MFG. DATE 1973 RCA 931-A NINE STAGE PHOTOMULTIPLIER VACUUM TUBE


The RCA 931A is the first commercially successful photomultiplier tube, and the first implementation of the popular nine-stage electrostatically focused circular dynode cage structure. Developed in a time before computer simulation, the electrostatic geometry of the 931A dynode cage was determined by placing mechanical models of the electrodes beneath a stretched rubber membrane, with the height of each electrode set to correspond with its electrical potential. Small balls were then placed on the membrane and allowed to roll along the simulated electron path.

The 931A features a S-4 spectral response and a peak sensitivity of 400nm.

Buyer to add $4. shipping (USA), $14. WORLDWIDE


QUESTIONS? please ask them before offerding.

PAYMENT INFORMATION:You can either use the \"PAY NOW\" button at the end of the sale, orI\'ll send you an invoice.I try to ship most items within2 business daysof payment. NOW REQUIRES A SIGNATURE UPON DELIVERY FOR ALL SHIPMENTS OVER $750..

INTERNATIONAL buyers:I accept payments from International buyers for amounts up to $250. For larger amounts,contact me.

SELLING INFORMATION:I try to inspect most of the equipment I list for sale, and to describe each completely & carefully. However, since some of the items can be over 60 years old, all items are sold \"as is\". Almost every older electronic item will benefit from a careful alignment and cleaning or other restoration. Images may not be unique. Shipping charge may not include AK or HI


Powered by SixBit\'s eCommerce Solution
Buy Now

Documentation