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Messa Boogie is straight off pumped up Fender Deluxe. Marshall is a variance of the Fender Bassman. Heres another amp schematic site: Most later amp manufactures became what they are from copying Fender and early Vox amps.
Class-A over saturated over driven pure blues sound. Distortion became the norm for sustained notes and all that jazz, more like all that blues. Artists later took advantage of this 'saturation' for 'that tube sound' along with higher than normal plate voltages pushing the maximums for more power from a small container. Youre right, the 5F1 output transformer is under rated mostly for cost saving. I have the diagram for these output transformers at home if you need a copy. I have another single ended amp using two 6SJ7 pentodes instead of the triodes found in 12AX7 and 6SL7 tubes for a different sound. The 12AX7 is wired for 6vdc using the center tap in the fillament termination differently than for 12vdc. See the Fender Princeton showing a 6SL7 instead of the 12AX7. The Universal Transformer is an extension to the Transformer models which combines the parallelizability and global receptive field of the Transformer model with the recurrent inductive bias of RNNs, which seems to be better suited to a range of algorithmic and natural language understanding sequence-to-sequence problems. Merit CTC A-3005 tube amplifier universal output transformer 5W 15.00 + 6.25 shipping OT20PP HC87 Output transformer 25VA & 8K/6K6 to 4/8/16 ohm 32.95 + 16.62 shipping Hover to zoom Image not available Have one to sell Sell now Shop with confidence eBay Money Back Guarantee Get the item you ordered or get your money back. Your 5F1 is in there along with the chassis layout. Thus, with an impedance ratio of 625:1 this will be met when using an 8 ohm speaker (625:1 x 8 = 5000:8).-PostonĬheck this sit out: Go to 'Schematics' then 'Fender'. At 250 volts on the plate, your 6V6 wants a load resistance of about 5000 ohms. This tells you that the turns ratio of that combination is 25:1. Then select the combination of two secondary lugs which measure about 1 volt. Connect a variac to the primary side of the output transformer and set it to 25 volts. Here is an example:Assume your 6V6 will operate at 250v plate voltage, and that you plan to use an 8 ohm speaker.
Universal output transformer a 3880 manual#
Then using a tube manual and knowing the speaker impedance, you can select the proper combination. Impedance ratio is the square of the turns ratio. You can measure the turns ratio of the various combinations of the six output lugs using a variac. Maybe someone here on the forum has one for the Stancor A-3849.But lacking any other info, you can figure this out for yourself. Hi Jim,Universal output transformers like this originally included an instruction sheet with a table, which made it easy to figure out.
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