Re: First transistors at Tektronix?

Dale H. Cook

On 10/24/2020 1:14 PM, Jeff Kruth wrote:

IIRC as well, the 453/454 had nuvistor first stages.

The original 453 (serials below 20,000) had Nuvistor inputs, as well as Nuvistors in the first stages of the sweep and triggering circuits, as well as pencil rectifiers in the HV supply for the CRT. The later production 453 (serials above 20,000) replaced the Nuvistors with FETs but kept the pencil rectifiers. The 453A replaced the pencil rectifiers with solid state HV diodes, so their only tubes were the CRTs.
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA

Join to automatically receive all group messages.