As it is well known, the famous Hickok dynamic tube test circuit was patented. The article relies mostly on one assumption: Hickok used basically the same circuit in the two testers, only adding a few new functions and improving the convenience and versatility of the new instrument. This task has been faced in an interesting article dated November 1964, in which the tube tester I-177 is updated by using the roll charts of the 6000 series models. The hope – or better the dream – is to be able to update a tube tester’s data chart by deducing values for newer tubes from a more recent instrument. Well-off persons usually buy more than one tube tester all others get along as they can. These tubes were back then considered “obsolete”, but today they may be of the greatest importance in the vintage radio repair hobby. Moreover, older tube testers have a data chart necessarily limited to older tubes, while recent testers can test recent tubes but lack data belonging to old tubes, which are no longer reported on their charts. As a matter of fact, North-American instruments will not test European tubes while European units are harder to find and will test, in the best case, only the most diffused U.S.

The purchase of a tube tester is an exciting step for a radio ham, but may have frustrating angles indeed. Questo articolo puo' essere letto anche in lingua italiana su Le Radio di Sophie For a correct reference to this article: Gilardetti M., Spear D.: Update your Hickok I-177 to fall 1971 with the data rollchart of model 6000. Free use and copy if the article is correctly referenced trading, sale or resell in every form is strictly prohibited. All rights reserved on text, pictures, software and all related attachments. This article has been written in Italian language for Le Radio di Sophie (Italy) and in English language for the Radimuseum Stiftung Luzern (Switzerland). Update your Hickok I-177 to fall 1971 UPDATE YOUR HICKOK I-177 TO FALL 1971

Hickok 6000a tube chart 5e3