napalmdeath
Well-known member
FourT6and2":1xxrawf7 said:napalmdeath":1xxrawf7 said:Got it yesterday, and spent a couple hours with it. I gotta say, I'm disappointed. It has way too much gain! I get best useable tones in 60's mode, 70's mode I can't jive with, and modern mode is just way over the top. I don't find it as easy to find tones as a Splawn, I just find too much going on with all the switches.
And, what I was told was a half-power switch is actually an FX loop bypass. So, I'm disappointed with that too. At first I was pissed at the seller, because he was incorrect in his discription, but it is what it is, I can't really make him take it back.
Anybody buy a Yeti only to be disappointed, then work things out? There's something going on between gain 1 and gain 2 that I can't seem to find a happy medium. Some owners with some first-hand experiences, I'd love to hear your thoughts, as I may just flip it.
I will say, a 5751 in V2 worked very well. But, as it stands, I'm not as impressed as I think I should be. I don't really get a Marshall vibe from it. Now, I'm kicking myself for selling my 2525H. That amp rocked.
Any recommendations on an attenuator? A Fryette PS-2 is out of the question, GOOD LUCK finding one. That's the other issue. For those who claim to get great lower volume tones, I say B.S. This amp needs massive volume to open up.
Sounds like you might need to spend more time figuring out how all the controls work together. Have you spent much time with a Jose-modded amp before?
napalmdeath":1xxrawf7 said:It has new Mullard EL34's in it, and bias is on the money. I rolled some tubes, put a Tungsol in V1, NOS GE 5751 in V2, and Mullard CV4004 in V3.
Tungsol reissue will be too bright and gainy in these amps, as you've discovered.
napalmdeath":1xxrawf7 said:slaveunit":1xxrawf7 said:How are your bright switches set? How much have you played with those?
Currently, both far left. Both in 60's, and 80's. I've trued several variations, and I think middle on the 2nd switch bypasses that side.
Using both bright switches is one of the problems. Too much gain. Try Gain 1 switch to the left with Gain one at or below 12:00. Pull out the pot to engage the feel control. Then use Gain 2 as your main gain control. As you reduce Gain 1, it will reduce a bit of gain, but also make the bright cap you engaged with the switch more apparent. As you increase Gain 1, the cap will have less and less effect. If the amp with the zeners OFF has too much gain, though, you bought the wrong amp. These are high-gain amps, not really meant for AC/DC levels of gain even though they can do that. Ok, well not high-gain, because it's all diode clipping. But same thing.
If '80s mode (Era to the right) has too much compression and gain, you can try changing the zeners from 20v to 24v. But 20v zeners really don't have what most would consider an overabundance of clipping... The other mods suggested above are good. Reduce V1a plate load to 330K or even lower. Decrease slope resistor from 47K to 39K – 33K. And you can even try changing the 82K feel resistor off Gain 1 wiper to 68K.
Also these amps like a colder, mismatched bias. Bias to around 60%. Maybe a little higher. And then intentionally mismatch the bias by 3-5mA.
And set the pussy trimmer to about 470K-500K to get the typical voltage divider values. It's a 1MA pot, so that would be about 3:00 on the dial.
Go easy on the Presence and Treble. Push the mids.
Good info, thanks. Yes, the main source of cluster fuck is 2 gains, and the bright switches, (though they also add gain in certain positions). I'll try some preamp tube swapping tonight, and play with the knob a bit.