At 06:50 PM 4/27/2018, Jeff Urban wrote:
Now that I think about it I bet some of these triodes could be replaced with depletion mode N channel FETs.
Tek replaced the front-end, sweep generator, and trigger generator Nuvistors (all 8393) with FETs in the 453 beginning with serial 20,000.
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA