Original vintage Mullard 56AVP photomultiplier tube, clearly factory marked:
Mullard 56AVP Made in France
The tube also carries the identification number 86936 internally.
The 56AVP was a high-performance fast photomultiplier designed for demanding scientific instrumentation. Mullard’s technical literature specifies the 56AVP with a 44 mm S11(A) photocathode and 14-stage electron multiplier.
The type has a particularly strong history in nuclear and particle research. Published experimental work records 56AVP tubes coupled to NaI(Tl) scintillation crystals for gamma-ray measurements, while UK neutron research used Mullard 56AVPs with liquid scintillation detectors.
This example retains its substantial blue multi-pin base and the characteristic internal 14-stage multiplier structure is clearly visible through the glass.
Provenance
This photomultiplier was removed from scientific research equipment originating from facilities at either Harwell or Rutherford Laboratories, where it formed part of an important research project.
The tube was working when the equipment was decommissioned.
To the best of my knowledge this tube remains in fully working order; however, I am unable to test it with the specialist equipment required and therefore cannot guarantee its present performance.
If the buyer is not satisfied with the operation of the tube, I am happy to provide a full refund or, where available, replace it with an equivalent tube.
Features & Details
* Manufacturer: Mullard * Type: 56AVP * Made in France * Identification number visible: 86936 * Photomultiplier / PMT * 14-stage electron multiplier * 44 mm photocathode * S11(A) spectral response * Fast-response scientific PMT * Large multi-pin base * Original black light-screening/protective coating remains on the tube * Used historically for scintillation detection and nuclear instrumentation * Documented use with NaI(Tl) and liquid scintillators * Used laboratory component * Ex-Harwell / Rutherford Laboratories research equipment * Working when decommissioned * Currently untested * Supplied with the plain storage box shown
One particularly relevant UK research source describes neutron detectors using Mullard 56AVP photomultipliers, noting the tube’s 14 stages and operation in detector systems at approximately 2 kV.
Condition
Used vintage laboratory condition.
This is a previously used scientific photomultiplier and not New Old Stock.
The glass envelope appears intact and the internal structures are exceptionally clear. The blue base and pins are complete and show normal signs of previous use.
The black external coating around the upper and lower portions shows considerable age and wear, with uneven areas, old adhesive and surface deterioration visible. This is cosmetic and consistent with a tube that has previously been installed in scientific equipment.
Supplied with the plain cardboard storage box shown in the photographs. This is not being described as the original factory box.
Working when decommissioned and believed to remain operational, but currently untested.
Please study all photographs carefully as they form an important part of the description.
Shipping & Handling
• Packing: will be safely wrapped • UK delivery: Tracked • International: Available worldwide via eBay Global Shipping Programme • Combined shipping: Yes—happy to combine postage on multiple items • Local collection: Possible by prior arrangement—message first.
Buyers please note
All buyers – If you see something of interest in my listings, please don’t hesitate to make an offer. I believe I have priced my items fairly; however, I don’t always get it right. Feel free to contact me or submit a reasonable offer and I will give it serious consideration. I’m here to sell at the end of the day.
International buyers – Due to the way eBay handles international transactions, postage is charged on a per-item basis. I understand this can be frustrating if you wish to purchase more than one item. If you would like multiple items, please contact me with the item numbers and I will combine them into a single listing. This will reduce the overall postage and handling costs into one transaction.