Looks interesting. I'd love to hear some clips!
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Show posts MenuQuote from: saturated on May 05, 2024, 11:10:45 PMAnyhow I found that if you are playing a song off YouTube on your phone like trying to learn it while you play...if you hold it up to your pickups it will play through your amp
Quote from: saturated on April 09, 2024, 05:20:43 AMThank you sir I am glad I did not have to touch any power tubes...in the back of my mind I had heard about tube biasing and was dreading having to do something like that. But I looked it up and evidently preamp tubes are just plug and play...?
The two 12ax7 I switched positions were in there really tight. To avoid broken glass and blood I put on a leather work glove.
I really appreciate everyone's help with this idk what we did but it's sounding really crazy nice it still has a little hum at low volume but I ain't touching it right now.
Quote from: monte on March 20, 2024, 09:12:51 AMThanks for the input!
I understand it likely not being best practice. I slowly I want to upgrade to a more 'grown-up' and proper set up, but for now I thought this could be cool for some experimentation. As long as I am not blowing anything up.
Quote from: JonnyDeth on March 20, 2024, 08:56:50 AMThe problem with this perspective is ultimately useable volume and wattage when you do a more thorough test of 100 Hz, 1 Khz, and 10 Khz with a sine wave. 1-watt @1 meter is using a 1 Khz sine wave, so it's dB rating isn't always the most reliable in terms of overall performance and projection.
Relative to this is the hardware distorting within a certain pitch range, as well as the speaker. You have to be prepared for potential crossover distortion, and many amps greatly lose efficiency in the lower frequencies at any volume. I agree that the speaker is one of the most important components regarding performance all across the board, and changing speakers may give you better performance and with a few more dB of useable volume, and that's a lot.
You must also take into realization that RMS/Peak wattage isn't telling you a whole lot in again, relationship to 100 Hz, 1 Khz and 10 Khz. Once you incorporate a speaker as the load on the circuit, you aren't dealing with watts, but the VAR of a resonant circuit. This is the precise point at which current and voltage meet in phase, and you get the most power transfer.
I've seen the most efficient systems built by using 100 Hz instead of 1 Khz exclusively to rate a speaker as well as the amp, and the VAR in equivalent effective wattage might be 10 watts compared to a 1 Khz sine wave resonating at 100 VAR(watts), or it might still be 100 VAR(watts) when using a 100 Hz sine wave, and that's phenomenal.
This is the final attribute where you also start to realize efficiency is overrated. I would rather have 100 effective watts of Class-A @ 100 Hz than Class-A/B or worse yet, Class-D. A really well-designed Class-A amp focused on VAR for 100 Hz resonance just as much as 1 Khz will be an animal not much can compete with. It's why some of these really old tube amps that weigh 150lbs will be just 30 or 40 watts, but they can compete with a modern Class-A/B or D that's full blast and rated 200.
Quote from: monte on March 20, 2024, 08:40:04 AMHi all,
I am quite new to amplifiers, I get the basics but have a little technical question. I just got an Orange Micro Dark hybrid (tube preamp/ SS power amp) that I am plugging into a 2x12 cab and that's quite nice for practicing at home. The Orange MD has an effects loop and I had an idea of splitting the loop signal into wet/dry and sending the wet (mostly for delay) into another practice amp I have, a Roland Cube 20 (an 80s, orange version one) and dry into the Orange power amp (as usual). The thing is, the Roland doesn't have an effects loop, so I would have to send the wet into the amps line in. Is this at all doable? I figure I'd ask before I blow up my Roland, which I like quite a lot.
And in general, is it ok to plug an effects loop out into the line in of another amp (tube or solid state)? From what I understand, the preamp stage of an amp functions in a similar way than an OD/Preamp pedal, so that should be fine?
Any thoughts/concerns/ideas are welcome!
Thank you so much!
Quote from: fazeka on March 19, 2024, 05:11:11 PMThanks Tessieviking for this!
FWIW/FYR: here's the broken one that came out of the amp:
How's this through-hole axial look as a replacement?
Would like a stud mount like the original but me thinks these went the way of the dinosaurs...
Quote from: Maddus on February 26, 2024, 03:24:54 AMIs it bad for the chip when only one channel is mostly used? So my idea would be to hook up one channel to an internal speaker and the other to an extension speaker jack.
Quote from: Maddus on February 15, 2024, 03:10:24 AMI was given a LA4282 from my fathers workshop (he repaired lots of TVs in the 90s).
To use this for my guitar projects, I would like to know if I can bridge this like a LA4440 for example, and what external circuitry is needed.
The LA4282 already has input and feedback resistors for a gain of 101 integrated.
Datasheets:
LA4282:
https://www.mouser.de/datasheet/2/308/1/LA4282_D-2314539.pdf
LA4440:
https://www.electroschematics.com/wp-content/uploads/2012/07/la4440-datasheet.pdf