EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

Daniel Kingloff
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  • Atlanta, GA
  • United States
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Daniel Kingloff's Discussions

Scott 800 PM vs electromagnetic speakers

Started this discussion. Last reply by Alex R. Whitaker 7 hours ago. 3 Replies

I have an 800 chassis that I bought some years ago without a speaker or cabinet.  I'd like to get it working again but have some confusions about the speakers.  I understand that some were PM and…Continue

 

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Alex R. Whitaker replied to Daniel Kingloff's discussion Scott 800 PM vs electromagnetic speakers
"Check the Scott Info Archive on this page.....it might have that information.  Based on my experience with other brands, in that post-war era, it's probably 3.2 ohms to the speaker voice coil.  Input would be typical 6L6 class B…"
7 hours ago
Daniel Kingloff replied to Daniel Kingloff's discussion Scott 800 PM vs electromagnetic speakers
"So what is the native output impedance of the output transformers?"
17 hours ago
Norman S Braithwaite replied to Daniel Kingloff's discussion Scott 800 PM vs electromagnetic speakers
"There were two versions of the Model 800B, early and late.  The late version had two chokes on the power amplifier and a revised tube layout.  Many of the early version were updated to add the additional choke.  The early version had…"
18 hours ago
Daniel Kingloff posted a discussion

Scott 800 PM vs electromagnetic speakers

I have an 800 chassis that I bought some years ago without a speaker or cabinet.  I'd like to get it working again but have some confusions about the speakers.  I understand that some were PM and some electromagnetic and the ones with PM's have a resistor to add some impedance substitution for the coil in the EM version.  Was there an electrical difference in the 2 versions?  I'm assuming that the PM version utilized a choke in the power supply. If there was a difference in the electronics, how…See More
18 hours ago

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