"Pushed" BF Fender tone

[Gaz]

I wanna try to do a 3 stage clean channel with a BF Fender voicing. The idea is that I can use pre-PI master volume, but still get a gritty/pushed Fender-y tone when the gain is cranked. I really don't like post-PI master volumes in 60's Fender circuits, which is why I wanted to do something different.

I'm just looking for some examples to start from that have a 3-stage clean similar. I feel like I've seen this in Mesas and Peaveys before...

Thanks for any pointers!

[roberto]

You can try the ninja boost designed by Rivers:
http://elektrotanya.com/PREVIEWS/634632 ... .pdf_1.png

[V2]

The TW Express has 3 gain stages, with the tone stack between the first and second stage. The third stage pairs a 100k anode resistor with an unbypassed 10k cathode resistor for a gain of < 10. So I think that might be a decent place to start. Add your pre-PI master, perhaps stick to more typical Fender tone stack values, and tweak the voltage divider between stage 2 and 3 until you are happy....

[roberto]

But that way you will not obtain a clean channel.

[Firestorm]

In 3-stage Fenders, the gain of the reverb mix third stage is set by the 3M3 which forms a voltage divider with the paralleled 470K/220K off the reverb pot. I've seen modded amps where the 3M3 is taken down to 1M or lower (and the brightness cap sometimes resized proportionately) and those amps can get a nice loud growl. The sneaky way to implement a master is to make the 220K shunt resistor into a 250K pot wired as a rheostat so you control the third stage gain.

[pdf64]

My experience is that the tone from an overdriven Fender reverb channel pre-amp doesn't bear much relation to the tone of an overdriven Fender amp.
Whereas a type 2 master volume or similar can work pretty well in one if there's a 12AX7 or 5751 in the LTP, rather than a 12AT7.

Edit - corrected the 5751 reference.

[matt h]

(deleted)

[pdf64]

Yes, the PPIMV / Lar Mar etc, I should have referenced the trainwreck pages http://www.blueguitar.org/new/schem/tra ... _pages.pdf p41-44.
Actually, the crossline type 3 works fine too, again as long as it's not on a 12AT7.

[V2]

I read the OP as wanting to add one gain stage to the base Fender BF circuit - to get a 'pushed' sound without relying on drive from the PI. If this is the case, then I think the TW Express circuit is a good starting point. Certainly the gain of each stage could be tweaked so that a clean sound is possible with the 'gain' knob dialled back. In addition, for any gain stage, the OP could split the anode resistance into two parts and take the output from the middle. Easy.

[beasleybodyshop]

You could also run a 12AX7 in V1

[M Fowler]

I've built the Hot Rod Tweed a blackface conversion and I plan on building the Hot Rod Crunch. It gets a good Fender grind. Steve Ahola's website.

[ampfab]

I read the OP as wanting to add one gain stage to the base Fender BF circuit - to get a 'pushed' sound without relying on drive from the PI. If this is the case, then I think the TW Express circuit is a good starting point. Certainly the gain of each stage could be tweaked so that a clean sound is possible with the 'gain' knob dialled back. In addition, for any gain stage, the OP could split the anode resistance into two parts and take the output from the middle. Easy.

X2

[johnnyreece]

I somewhat recently did a Princeton Reverb with the trem and verb removed. The guy I built it for is happy. Might be worth a look:

https://tubeamparchive.com/viewtopic.ph ... sc&start=0

[M Fowler]

Not a multi gain stage circuit but I've built a 50w version of a Dumble Princeton Amp conversion.

It is a great circuit starts out clean with nice bass response and can bring on a very nice grind at higher voltage. I used Marshall JTM45 chassis with MC JTM45 transformers.

Mark

[Structo]

Getting that driven distortion at lower volumes has been the challenge since somebody first dimed a tube amp.
It sounded so great!
It was so friggin loud!

I'd like to play around with a low watt amp with the D preamp section.