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Old 7th September 2012, 07:02 AM   #21
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Thanks Enzo. I'm going to toy with the cathode bypass caps. I thought about that 220K on the input as well and I switched it out with a 47K I had laying around. Thanks for the suggestions!
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Old 23rd September 2012, 12:43 AM   #22
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Just picked up one of these organs at Goodwill for $12.50. Turns out it works. I couldn't hear the effect of the vibrato however. Strange arrangement as an organ. The organ itself is one of those air type. Not sure what they are called since I am not an organ collector. There are microphones over the keyboard area that feed the amplifier. It has all the original Silvertone tubes in it.
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Old 3rd October 2012, 02:58 AM   #23
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Thats cool. Can you tell me the ohm rating of the speaker in it?
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Old 3rd October 2012, 04:19 AM   #24
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Based on measurements with my meter, I would say that it is an 8 ohm.
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Old 3rd October 2012, 06:04 PM   #25
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Great, thanks! Have you gotten the vibrato working?
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Old 22nd April 2013, 02:43 AM   #26
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Default Guitar friendly

Hey I have two of these amps I'm modding into guitar amps. I am going to use the Magnatone 410 schematic(Great Tremelo) to mod mine. It's almost Identical in the input and tremelo section. It even has a speed control as the caps are all same values I believe just a couple resistors and a pot for the speed is all you need. You can add a tone control to it to replace the flute/string switch that is wired to one setting each.
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