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Thanks for your help on this!

So the L2 R2 is another low pass (squash) to further attenuate any low frequency C1 passes. Would this be considered 2nd order for the tweeter and create a 12dB/octave response?

Found one error in the transcription... removed R2 to C2 connection... still pretty stymied by the tweeter filter.

I traced this crossover and created the attached schematic. It's from an outdoor two-way 2 woofer/1 Tweeter. Woofers are 5 1/4" 8 ohm aluminum cone and a 1" dome tweeter. I can sort of understand the low pass filter (Woofer 1 and 2). I dont know the values of the Inductors, but L1 has a...

From what I understand the output stage is primarily a current amplifier, and hfe(beta) is the current gain(multiplier) with respect to base drive. As my knowledge of the design of the drivers is non existent, I could not comment of what the ideal range of hfe needs to be for this output...

I believe that what you are seeing is indiciative of the "older" power transistors as seen in the data sheet hfe min=10, and no max specified. As a parallel observation, I have original SAE output transistors from a MK IVCM (100watt/ch amp) that measure low hfe as well. My SAE 101's (NPN) hfe...

I know it seems obvious that the engineering change from 4 fin to 8 fin would be to fix a heat issue, but are the 4 fins marginal or just a bad design? Did they forget that the ambient temps may not be room (25 c). Seems like Carver (the man) would have figured out the correct sq area. I...

Hi folks, new to this forum... Got a very nice unmolested PL 400 4 fin. Sent an email to White Oak regarding the control bd and whether or not their board can be used in an early non PL14 control bd unit. I believe my amp has a PL 400c control bd. It looks like the output x-istors and design...