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I have a Trace Elliot Speed Twin 50 watt combo that I "think" needs an output transformer. It's symptoms included somewhat reduced output for a while, then really bad sounding breaking bottle like distortion on real loud notes, then almost no output altogether Have to crank all controls wide open then you just barely head output)
I have done the following:
-Replaced all tubes and biased
-Checked all power supply voltages
-Replaced all High Voltage caps
-Checked coupling caps between amp stages
-Checked value of all pertinent power amp resistors.
-Verified that preamp runs fine by using the effects loop output into the poweramp of another amplifier.
-Tried a different speaker
A also performed some DC resistance measurements on the output transformer, which I know are of limited use, but they are:
Primary:
One end to center tap:37.5 ohms
Other end to center tap: 60 ohms
End to End:67 ohms
Shouldn't the overall equal the sum of the two parts ? Is this suspect ?
Output side:
Common to 16 ohm tap: 0.1 ohm
Common to 8 ohm tap: 0.6 ohms
Common to r ohm tap: 0.4 ohms
Does ANYONE know where I can get a spec to identify a replacement ? There are no markings on the transformer, and no part number listed in the service manual. Any assistance would be greatly appreciated.
I have done the following:
-Replaced all tubes and biased
-Checked all power supply voltages
-Replaced all High Voltage caps
-Checked coupling caps between amp stages
-Checked value of all pertinent power amp resistors.
-Verified that preamp runs fine by using the effects loop output into the poweramp of another amplifier.
-Tried a different speaker
A also performed some DC resistance measurements on the output transformer, which I know are of limited use, but they are:
Primary:
One end to center tap:37.5 ohms
Other end to center tap: 60 ohms
End to End:67 ohms
Shouldn't the overall equal the sum of the two parts ? Is this suspect ?
Output side:
Common to 16 ohm tap: 0.1 ohm
Common to 8 ohm tap: 0.6 ohms
Common to r ohm tap: 0.4 ohms
Does ANYONE know where I can get a spec to identify a replacement ? There are no markings on the transformer, and no part number listed in the service manual. Any assistance would be greatly appreciated.