GZ34
On Tuesday, July 25, 2017 at 3:55:33 AM UTC-4, Big Bad Bob wrote:
I expect a simple series resistor does the trick, but an actual tube's
behavior might be nonlinear...
Yes. The 5AR4/GZ34 and related clones are a (relatively) slow-onset rectifier that (theoretically) allows the output tubes to get hot before seeing B+. This, thereby, reduces the strain on the filter caps.
The Weber "copper top" et.al. solid-state replacements are not quite as slow, but neither are they as expensive as a decent 5AR4, and also should last longer.
Peter Wieck
Melrose Park, PA
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