The “universal” preamp 6 tube stereo pre Groovewatt a diy vacuum tube (valve) riaa phono preamplifier project
Are this transformers usable (z primary 5-20k / z secondary 12.5-50k) Phono preamp riaa schematic tube valve amplifier updated vacuum circuit diy audio tubes electronics diyaudioprojects preamplifier schematics radio power project Tube stereo pre amplifier preamp schematics audio power valve vacuum transformer radios circuits electronic secondary list 5a 117v 500v ct
20k usable transformers 50k .
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6 Tube Stereo Pre
The “Universal” Preamp | Cascade Tubes
Are this Transformers usable (Z primary 5-20K / Z secondary 12.5-50k)