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marshall 18 watt tremolo psu question
marshall 18 watt tremolo psu question
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Old 14th February 2019, 02:24 AM   #31
PRR is offline PRR  United States
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Then it is likely a 6k6 primary and two secondaries you can connect for either 4 or 16 Ohms.
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Old 17th February 2019, 04:24 PM   #32
intensate is offline intensate  United Kingdom
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It would seem like I have 2 4onm taps?
And el84 need an 8k transformer so I may need to get one?
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Old 17th February 2019, 04:36 PM   #33
OrbitalLex is offline OrbitalLex  United States
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6.6k is fine for el84's. I doubt you have 2 four ohm taps. Is there a code stamped into the bell of the transformer? That may help determine the make and color code.
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Old 17th February 2019, 05:03 PM   #34
intensate is offline intensate  United Kingdom
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just had a loo inside the bells ,nothing written



only markings are 1100 on top


pink and yellow are one winding,blue and oronge other set
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Last edited by intensate; 17th February 2019 at 05:06 PM.
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Old 17th February 2019, 05:06 PM   #35
OrbitalLex is offline OrbitalLex  United States
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Is there anything stamped on the outside?
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Old 17th February 2019, 05:10 PM   #36
intensate is offline intensate  United Kingdom
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nothing on outside apart from 1100 printed on it



thanks
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Old 17th February 2019, 05:14 PM   #37
intensate is offline intensate  United Kingdom
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only thought I had was to feed a 1khz 500mv p p signal from my scope into its sec and measure volt at pri? to see if I get different readings
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Old 17th February 2019, 05:18 PM   #38
OrbitalLex is offline OrbitalLex  United States
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That redish pink lead is likely your b+

Blue and yellow leads are likely plates
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Old 17th February 2019, 05:30 PM   #39
intensate is offline intensate  United Kingdom
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the pri winding are brown, black ct and red that exit otherside

Last edited by intensate; 17th February 2019 at 05:34 PM.
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Old 17th February 2019, 08:02 PM   #40
PRR is offline PRR  United States
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Put the two secondaries parallel for 4 ohm, series for 16 Ohms.

It might help to describe this "donor".
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