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Re: Paul Joppa's measurments of the Carver Crimson 275
Posted: January 22nd, 2022, 12:17 pm
by David McGown
For all as a reference, attached is a schematic of the infamous amplifier. It will answer the question on the Zobel across the secondary windings. Note the complex feedback compensation.
David
Re: Paul Joppa's measurments of the Carver Crimson 275
Posted: January 22nd, 2022, 12:22 pm
by Pelliott321
I believe Walt mentioned all the shenanigans Carver went through with the feedback circuit to correct all the nasties the poorly designed amp causes.
The zoebel is probably to get rid of some too
Re: Paul Joppa's measurments of the Carver Crimson 275
Posted: January 22nd, 2022, 12:36 pm
by SoundMods
Cogito wrote:This is the screen cap of ASR Carver Crimson review. What are the Cap and resistor across the speaker terminal for?
The attachment delme1.jpg is no longer available
It is a Zobel network (aka. snubber). It serves to help amplifier stability when connected to speakers with cables that may create possible oscillation because of interaction with the amp's feedback.
And the Carvers have a boat load of feedback. Polk Audio sold snubbers like this with their Cobra Cables because of stability issues with that cable. The RC network was contained in a plastic enclosure that you connected to the speaker terminals.
Re: Paul Joppa's measurments of the Carver Crimson 275
Posted: January 22nd, 2022, 3:58 pm
by Pelliott321
I always had a feeling that the Carver tube amps were suspect.
I have never heard them but they seem to good to be ture