On Fri, May 29, 2020 at 05:13 PM, Roger Evans wrote:
If you are concerned about the pulse response for very fast risetimes I would
recommend the 7A29 over the 7A19. I have two 7A19s and they are very difficult
to set up for clean pulse response, you need an extender (which I don't have)
and decent non metallic tools to adjust the hairpin inductors which work
harden slightly after several attempts to adjust them. The 7A29 has a much
cleaner step response but may be getting hard to find.
The 7A29 was a much better (and newer) amplifier than the 7A19 altogether. Much has been written about that and can be found on TekWiki and other sources.
Raymond
Raymond Domp Frank