The Pro Reverb is one of the beloved 40W 6L6 working horses. It has half the number of power tubes, smaller transformers and a tube rectifier in stead of diodes. Together this makes the Pro Reverb break up significantly around the usual volume level 4, while the Twin Reverb is clean almost all the way up.
It was affectionately known as the Indian Head test pattern, for the stylized Native American, resplendent in a feathered headdress, that featured prominently in the graphic. Unknown to most viewers was exactly how that test pattern and others like it were generated. It turns out that while some test patterns were merely a studio camera trained on a printed card, most were generated by a special tube called a monoscope.
If some of you have home electronic workshops like me or a section of your warehouse where no one's been in years, you probably have older electronic components stashed away on shelves or in boxes you haven't seen in quite some time. I have boxes of resistors, capacitors, transistors, ICs, and vacuum tubes I've picked up over the years in hopes of someday needing them for a repair or a project I never got to. Instead of tossing it out or recycling it all you might want to take a quick look to see what's there.
Guitarists who habitually use tube amps tend to be aware that the tubes themselves play a significant part in shaping the sonic personalities of those amps. In some cases it can be pretty easy to change up an amp's fundamental characteristics, too, just by changing tubes in some crucial positions—and the tube that affects the biggest sonic change in most amps is the one we call "V1" for "valve number one"the first preamp tube that your guitar's signal hits after entering the amp's input. The following discussion of preamp tube swaps, therefore, will focus on the effect of changing out the tube in that position, but be aware that you will want to refer to your amp manufacturer's user's manual, schematic, or other technical information for the amp in question to ensure you are correctly locating the first preamp tube in the channel to which you want to apply these tone tweaks. If you have a two-channel amp, for example, and want to alter the characteristics of the second channel, the preamp tube you need to change might actually be the second in line generally referred to as "V2"even though it's the first tube in that channel.
Discussion in ' Audio Hardware ' started by Samson7Jun 16, Log in or Sign up. Steve Hoffman Music Forums.
They are in exceptional shape, some with near perfect decals, others with heat-baked decals out of storage in Australia — and most with fair white screen printing, which is very soft and powdery after all these years unfortunately. With human vocals it has such a lifelike resonance, so completely real that it seems almost holographic in every detail, and as such is very emotionally tying on well-recorded tracks. On wooden instruments and brass, it sometimes is able catch the listener completely off-guard, often startling the listener by placing guitars and vocals out into the room unexpectedly.
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My first experience with the sound of vintage tubes was at a very early age while using a radio as an amp for my guitar. THAT sound immersed itself in my brain ever since. It was a sound that came back to my ears when, thirty years later, I used a vintage tube in an amp I was very familiar with.