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Marconi_MPT4 · 21st May 2021, 11:33 am

Cossor 172K data.

Handling the book required extreme care as the paper is crumbling away while the print has faded badly in places.

A minor point but ILIFFE Radio Valve Data, omitted to show the a1 and a2 potentials and that pin 6 has an internal connection.

A piece of trivia, a price list dated 19th November 1956 and a new 172K is priced at £14 plus additional Purchase Tax of £6 2s 11d

Rich

21st May 2021, 11:33 am	#27
Marconi_MPT4 Heptode Join Date: Mar 2011 Location: Dorset, UK. Posts: 522	Re: Help with some old TV tubes. Cossor 172K data. Handling the book required extreme care as the paper is crumbling away while the print has faded badly in places. A minor point but ILIFFE Radio Valve Data, omitted to show the a1 and a2 potentials and that pin 6 has an internal connection. A piece of trivia, a price list dated 19th November 1956 and a new 172K is priced at £14 plus additional Purchase Tax of £6 2s 11d Rich Attached Thumbnails __________________ To an optimist a glass is half full; a pessimist half empty; an engineer twice as big as need be!