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Schematics These schematics are from a library I have been compiling for years. Look for the ones marked 'TESTED'; they are plans I have personally built and tested. Only unique design and good performers are posted here. Enjoy! |
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Note: For detailed design information and test results, about any of the schematics, send me an EMAIL. | ||
| Abbreviations: SS = Solid State XFMR
= Transformer Push-Pull
Amplifiers | Single-Ended |
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| Single-Ended Amplifiers | |||
| XFMR coupled WE437a to 300B - Looks like a good performer - 5U4 rectifier - Local feedback at output tube |  |
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| 30W SE amp using the famous 6C33-B Russian tube - EL34 driver and paralleled 12AX7 input - Parafeed coupling to output transformer - Regulated negative supply |  |
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| TESTED This schematic was tested with the Svetlana EF86 and 6550 - Very good performer with good tones - The output xfmr used is from SOWTER |  |
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| Good design using direct coupling between the driver and output tubes - The use of a negative supply on the cathodes of the input (12AX7) and driver (6CG7) tubes lends itself to good dynamic stability |  |
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| TESTED This circuit was tested with a SOWTER output xfmr - Excellent performance - ECC83 input and 4 EL84 output - I love the sound of the Amperex Bugle Boy EL84s that were used - Lots of single-ended power |  |
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| TESTED This circuit performed very well - EF86 input EL84 output - Very low distortion levels with good tubes |  |
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| TESTED ECC82 input EL84 output integrated amp - Gain was a little high - Great sound |  |
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| Paralleled 12AX7 input, EL34 output - Good design |  |
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| Single ECL82/6BM8 power amp - Tested with the Svetlana 6BM8 and SOWTER output - Very impressive sound production with efficient speakers - I did not care much for the un-isolated power supply, I used a separate regulated one |  |
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| Integrated ECL82 power amp - Easy to build - Great starter amp for the novice |  |
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| XFMR coupled to cathode amp - 6SN7/KT90 tube compliment - Good design - We all are familiar with the good linearity of the 6SN7 |  |
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| XFMR coupled 811a amp - 6F6 driver, 12AU7A SRPP input stage - Looks like a good performer |  |
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| 6V6 hybrid amp, LF356ah mosfet op-amp input - Well designed - Should render an interesting performance |  |
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| 6SU7/6GB8 direct coupled design - Should give excellent LF response |  |
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| 12AT7/6550 SE design - Quite simple to build |  |
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| Parallel SRPP design using the ECC81 dual triode - 5U4 rectifier - Should yield good S/N ratio |  |
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| 6BM8/300B power amplifier - Good design - Should be a good performer |  |
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| SRPP 12AT7 input, EL34 driver, 300B output - The EL34 will take the output tube to it limit, probably generating grid current - Should be a good performer |  |
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| XFMR coupled 300B amp - Zero feedback, tube rectification - Paralleled 12AT7 input should give a low noise figure |  |
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| Custom PTP boards for these Schematics | |||
