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  • Profile picture of Rohbiwan

    Rohbiwan replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Good news on the PT.

    Having now read the entire two stroke wiki, I realize my original question was answered there, so thanks for being patient with me.

    I purchased a majority of the parts for the two stroke from one of your recommended sites, Amplified parts, and they did a fabulous job. Ordered enough to make 4 sets of electronics on Wednesday…[Read more]

  • Profile picture of Rohbiwan

    Rohbiwan replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Good news on the PT.

    Having now read the entire two stroke wiki, I realize my original question was answered there, so thanks for being patient with me.

    I purchased a majority of the parts for the two stroke from one of your recommended sites, Amplified parts, and they did a fabulous job. Ordered enough to make 4 sets of electronics on Wednesday…[Read more]

  • Profile picture of Rohbiwan

    Rohbiwan replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Good news on the PT.

    Having now read the entire two stroke wiki, I realize my original question was answered there, so thanks for being patient with me.

    I purchased a majority of the parts for the two stroke from one of your recommended sites, Amplified parts, and they did a fabulous job. Ordered enough to make 4 sets of electronics on Wednesday…[Read more]

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    That looks good, it even has a center tap for the heater circuit.

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    That looks good, it even has a center tap for the heater circuit.

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    That looks good, it even has a center tap for the heater circuit.

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    That looks good, it even has a center tap for the heater circuit.

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    That looks good, it even has a center tap for the heater circuit.

  • Profile picture of Rohbiwan

    Rohbiwan replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Continuing…

    As I collect parts from my warehouse and order what I lack, I find that I have a Hammond 290CX power transformer

    This transformer is 5V shy which I would think is close enough, and current looks good, but my lack of experience has me askin’ those with experience, if you don’t mind. Will this transformer make a suitable sub.

    Thanks,
    Bill

  • Profile picture of Rohbiwan

    Rohbiwan replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Continuing…

    As I collect parts from my warehouse and order what I lack, I find that I have a Hammond 290CX power transformer

    This transformer is 5V shy which I would think is close enough, and current looks good, but my lack of experience has me askin’ those with experience, if you don’t mind. Will this transformer make a suitable sub.

    Thanks,
    Bill

  • Profile picture of Rohbiwan

    Rohbiwan replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Continuing…

    As I collect parts from my warehouse and order what I lack, I find that I have a Hammond 290CX power transformer

    This transformer is 5V shy which I would think is close enough, and current looks good, but my lack of experience has me askin’ those with experience, if you don’t mind. Will this transformer make a suitable sub.

    Thanks,
    Bill

  • Profile picture of Rohbiwan

    Rohbiwan replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Continuing…

    As I collect parts from my warehouse and order what I lack, I find that I have a Hammond 290CX power transformer

    This transformer is 5V shy which I would think is close enough, and current looks good, but my lack of experience has me askin’ those with experience, if you don’t mind. Will this transformer make a suitable sub.

    Thanks,
    Bill

  • Profile picture of Rohbiwan

    Rohbiwan replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Continuing…

    As I collect parts from my warehouse and order what I lack, I find that I have a Hammond 290CX power transformer

    This transformer is 5V shy which I would think is close enough, and current looks good, but my lack of experience has me askin’ those with experience, if you don’t mind. Will this transformer make a suitable sub.

    Thanks,
    Bill

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Be sure to use the updated, single output tube version of the schematic and layout, the original 2 output tube version from the book will only work with 2 6V6, although you could build the original 2 output tube version and use just one 6L6 (or other output tube) without over-taxing the transformer. Read DH’s addendum as it addresses some vague…[Read more]

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Be sure to use the updated, single output tube version of the schematic and layout, the original 2 output tube version from the book will only work with 2 6V6, although you could build the original 2 output tube version and use just one 6L6 (or other output tube) without over-taxing the transformer. Read DH’s addendum as it addresses some vague…[Read more]

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Be sure to use the updated, single output tube version of the schematic and layout, the original 2 output tube version from the book will only work with 2 6V6, although you could build the original 2 output tube version and use just one 6L6 (or other output tube) without over-taxing the transformer. Read DH’s addendum as it addresses some vague…[Read more]

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Be sure to use the updated, single output tube version of the schematic and layout, the original 2 output tube version from the book will only work with 2 6V6, although you could build the original 2 output tube version and use just one 6L6 (or other output tube) without over-taxing the transformer. Read DH’s addendum as it addresses some vague…[Read more]

  • Profile picture of Robin

    Robin replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Be sure to use the updated, single output tube version of the schematic and layout, the original 2 output tube version from the book will only work with 2 6V6, although you could build the original 2 output tube version and use just one 6L6 (or other output tube) without over-taxing the transformer. Read DH’s addendum as it addresses some vague…[Read more]

  • Profile picture of Andy

    Andy replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Make sure you check out the Wiki page. We have the addendum to the book instructions there as well. It corrects some of the values and details some other changes including going down to 1 tube. Having 2 power tubes really doesn’t bring much to the table at the end of the day. Most of us build based on the addendum and do a single tube build.

  • Profile picture of Andy

    Andy replied to the topic output tube changeout in the forum 2 Stroke Amplifier Design and Building 12 years, 9 months ago

    Make sure you check out the Wiki page. We have the addendum to the book instructions there as well. It corrects some of the values and details some other changes including going down to 1 tube. Having 2 power tubes really doesn’t bring much to the table at the end of the day. Most of us build based on the addendum and do a single tube build.

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