EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

Need help with schematics for the Masterpiece 6. There was an early/late version, mine the earlier with dual choke power supply. There may
Be other variations much like Scott.

Views: 121

Comment by palegreenthumb on January 22, 2017 at 2:55pm

The power supply still uses both chokes, but in the late version amp, choke L1 is mounted outboard on the speaker pedestal. Electrically, the schematic doesn't really change because of that difference, only the cabling changes.

The early version with 2 chokes on the amp uses a 5-pin connector to the speaker. The late version with 1 choke on the amp uses a 7-pin connector to the speaker; the extra 2 wires connect to L1.

Comment by Dave on January 22, 2017 at 9:35pm
Excellent, Gerry has also filled in a lot of blanks here.
Comment by Dave on February 7, 2017 at 9:45am
For those who've gone a round with a Masterpiece 6, how do the cans release from chassis top ? Copper like rivets appear to be used as retainers. I can't twist or pull in any manner.
Comment by Norman S Braithwaite on February 7, 2017 at 10:41am

They do not release from the top. They are held down by nuts and lockwashers under the chassis.
Norman

Comment by Dave on February 7, 2017 at 11:59am
Thanks Norm, seems tedious but all's well that ends well
Comment by Dave on February 7, 2017 at 12:03pm
Also, I could use two (2) valve covers for this set. I know, needle in a haystack!
Comment by Norman S Braithwaite on February 7, 2017 at 3:46pm

From the photo it looks like you need two tube shields plus the bases.  The tube shield bases on the set appear to have been truncated.

Norman

Comment by Dave on February 7, 2017 at 8:17pm
They are two piece at least for the Masterpiece 6. I would need two 2 caps

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