On offer is a three gang 10pF + 35pF + 55pF air dielectric variable capacitor of compact size, manufactured by Jackson Brothers in the UK. This is similar to many that were used by the Air Ministry and RAF on numerous pieces of wireless and radar equipment during the 1940s. 

It measures about 4.50 inches [including rotor shaft] x 2.25 inches wide [including the connection tags] x 1.30 inches from the base to allow for the rotor swing and is mounted by screws into threaded bushes on the front plate. The rotor is mounted with a ball race at one end, a thrust bearing at the other and has a 0.25 inch diameter shaft which is about 1.00 inches long.

I have listed it as 10pF + 35pF + 55pF, but the actual values recorded are 5.1pF to 9.6pF on one gang, 6,3pF to 56.1pF on the next and 5.7pf to 34.9pF on the third, measured on a Peak LCR40 component analyser - see photographs 7, 8, 9, 10, 11 & 12 [for info] and is in working order.

This is an ideal opportunity to obtain a capacitor to replace one that is missing in a restoration project or as the basis for your home construction receiver. Do remember that all three gangs could be connected in parallel to produce a compact sized 100pF variable capacitor.

Description and condition can better be judged from the photographs which are of the actual capacitor on offer for sale.

This has been priced to sell, without reserve.

Please see the other items which I have on offer for sale.

BEFORE BIDDING, PLEASE READ ALL OF THE TERMS AND CONDITIONS BELOW.

1. PLEASE LOOK CLOSELY AT ALL OF THE PICTURES; THIS IS THE EXACT ITEM ON OFFER AND FORMS THE DESCRIPTION WHICH MAY TELL YOU SOMETHING THAT I HAVE NOT MENTIONED.

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3. I WILL TRY TO COMBINE POSTAGE ON MULTIPLE PURCHASES WHERE POSSIBLE, PROVIDING THAT THE COMBINED WEIGHT DOES NOT EXCEED 2KG. IF IT DOES I WILL TRY AND PACK AND POST PARCELS WITH THE MOST BENEFICIAL COMBINATIONS.

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5. THE GLOBAL SHIPPING PROGRAMME ALREADY PROVIDES THE BUYER WITH AN INVOICE FOR ALL APPLICABLE ITEMS, POSTAGE AND IMPORT CHARGES. Unfortunately, eBay will NOT allow me to edit these charges, or even to offer a P&P discount. The buyer will directly pay the purchase price of the item to me, plus any domestic postage cost as specified in the listing.

DOL27012024.