Comparing Bias settings on Vintage Fender Princeton

Comparing Bias settings on Vintage Fender Princeton | PART 2

Рет қаралды 929

Күн бұрын

In this video I show you how to dial in your bias adjustable on a Fender Princeton after adding adjustable bias to the amp. To see part 1, click here: • ADJUSTABLE Bias mod on...
This also works for Fender Champ and Vibrochamp models which are fixed bias like the princeton is. To see more work done to this amp, check out the playlist here: • 1968 Fender Princeton ...
00:00 - Catching you up to speed
01:24 - Bias discussion
03:08 - Checking resistance vs bias
03:57 - Let's check the bias
06:42 - Time to swap the bias resistor
07:27 - Discharging the caps first
09:14 - 15k Bias resistor test
12:36 - Let's compare the tone with different bias settings!
17:09 - So what did we hear?
18:29 - How matched are our vintage tubes?
20:15 - Bias with fresh JJ's
22:04 - Use your ears!
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Пікірлер: 18

@YeatzeeGuitar Ай бұрын

Catch Part 1, installing the adjustable bias setup, here: kzfaq.info/get/bejne/Zqipd5p3sbvDY40.htmlsi=O-A4icKKa98COMkI

@YeatzeeGuitar Ай бұрын

Afternoon post, hope everyone's having a great week!

@christophersambuco9414 Ай бұрын

Amazing how good the guitar tone is over my phone with its tiny speakers. Very nice playing as well.

@omarmolina207 Ай бұрын

Interesting idle dissipation has an effect on the intensity of the bias tremolo. If you still have this amp, repeat your test over the same pot rotation range but with the tremolo on. You'll find you have to settle for cooler bias to optimize the tone of the tremolo. To go further down the rabbit hole, there are resistor swaps you can do to increase tremolo intensity and allow you to go a bit warmer on the bias.

@sgt.grinch3299 Ай бұрын

Thank you for the episode.

@devinmastersislame Ай бұрын

Just watched an uncle Doug video on how bias affects tone. It was super interesting.

@YeatzeeGuitar Ай бұрын

Nice!

@MichaelSmith-rn1qw Ай бұрын

Bias is going to affect headroom more than anything, although there is some effect on tone. It may not be as apparent on smaller wattage amps like the Princeton. I liked the way the amp sounded with the old mis-matched RCA's. There is really no reason to use a carbon comp resistor in the bias circuit. I always replace them with a modern, more precise and reliable resistor.

@YeatzeeGuitar Ай бұрын

There is one reason, aesthetics. With something so original like this I think anything but a carbon comp looks goofy at best. YMMV. But yes, from a practical standpoint, objectively you're right.

@BCEpedals Ай бұрын

Ehh. Small wattage amps like champs/vibro champs/ NR Princeton, a CC resistor is just fine. It’ll change some when hot but hey 🤷🏻‍♂️. A carbon film is the best of both worlds for newer builds.

@MichiganRoots Ай бұрын

Besides some added reverb, did you use any dirt pedals here? If not you’re actually getting some really nice edge of breakup sounds. My ‘69 non verb barely breaks up on 10 and is a little harsher compared to yours. A compression pedal helps smooth mine out a bit. I do have the added bias pot so I’ll have to try biasing a tad warmer.

@YeatzeeGuitar Ай бұрын

Nope just guitar into amp cranked into UA ox box with some plate reverb. Sounds great!

@MichiganRoots Ай бұрын

Excellent work on yours. It sounds amazing!

@MichiganRoots 26 күн бұрын

Hey, I noticed that your bias jumps around quite drastically when you’re hitting hitting it with signal, and then returns to where it was. Mine does that too when I was adjusting the bias on my Princeton. Is this normal? Or should it stay put when feeding the amp some hard strums? Just curious. Thanks

@YeatzeeGuitar 26 күн бұрын

Your bias always changed when your amp is hit with signal, that's why you set the bias with the volume off / nothing hitting it.

@MichiganRoots 26 күн бұрын

@@YeatzeeGuitar Yeah, I always set it with no signal hitting it, but did notice when I was testing it that it jumped around. Glad to hear it’s normal. Thanks for the reply :)

@christophersambuco9414 Ай бұрын

What is the reverb that you're using?

@YeatzeeGuitar Ай бұрын

UA Ox Box