Here's what I came up with. It's the basic lite preamp, with an added gain/CF stage.
I read this article:
The...
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Yeah, I've read that, but I figured that I'd be redesigning the preamp anyways and I would do so to consider the reverb as well. Regardless, It's a no on...
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I'm still going with a PP 18 watt. I just got the OT today. Picked up a step drill to enlarge the holes on the tube sockets and place some ceramic ones in....
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Alright, well I managed to find a 15-20 watt 8k primary PP on eBay for around $10. It's new in box, and looks perfect for this.
So it's the...
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Impedance ratio is 1600:1, 12.8k at 8 ohm, 6.4k at 4 ohm. Could I use two SE output transformers in a push-pull arrangement, by connecting the windings to...
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My PT is 250V-0-250V RMS. I wasn't going off of manufacturing specs, since they are impossible to find, so I measured it on the voltmeter.
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Now I am totally confused. This is how I learned how to do it:
Bridge Full Wave:
Vrms x 1.414 x 0.637 = av. DC value
...
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Yeah, I am kind of worried about that. The transformer is pretty small, that's why I was asking if there was an easy way to estimate the power capabilities...Last edited by JKowalski; 07-27-2009, 08:16 PM.
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I checked earlier today after I stripped the chassis more thoroughly, the transformer secondary is 250V-0-250V. Based on my calculations of full wave bridge...
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Don't worry, I planned on registering eventually - today's a sort of clean up day in my "workshop" so I am kind of busy - I just left this topic...
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I didn't really want to get an account there at the moment (lazy & busy : P) but I found this marshall 18 watt amp on schematic heaven (1974). Is this...Last edited by JKowalski; 07-26-2009, 09:27 PM.
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Small Tube Amplifier Conversion
Alright, I got my hands on a super cheap tube amplifier at a thrift store. It was a stereo amplifier for a record player, super simple. Two EL84's, one 6au7,...Last edited by JKowalski; 07-26-2009, 07:36 PM.
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- Well, I know for a fact that this motor can reverse like I said - these ceiling fans have a "reverse" switch on them that lets you blow the air...
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DIY Leslie Speaker Speed Control
I am working on a DIY leslie made out of a shaded pole ceiling fan motor. I am trying to figure out the best way to control the speed of the motor.
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Proposed Tube Pedal Schematic
Today I drew up a schematic for a 2x 12AX7/ECC83 pedal. It uses a charge pump to get a 12V supply up to approx +45V...
This is my first delve...
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VOX Starstream
I'm asking a huge favor from anyone with a VOX starstream. I've been trying to find schematics for the electronics inside for ever and I have not had any...
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I really appreciate you taking the time to look through my schematic.
Thanks for the help. I'll update it again a bit later.
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Thanks alot for the tip! I think that might have been just a mistake in drawing. I updated it with the modification and etc.Last edited by JKowalski; 01-24-2009, 01:20 AM.
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VOX AC30/6 Top Boost w/ Reverb Schematic
I'm planning on building a VOX AC30/6 Top Boost with a custom reverb circuit. All the old schematics I could find were incredibly difficult to read so I cleaned...
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Okay - This thing has driven me insane for the past few days.
I redid my L/R modification on a whim - and guess what - it worked perfectly....
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Thanks for the reply,
I switched the two L/R completely. I assumed that would simply result in the clean signal and that same signal's reverb...
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