The Eagle Supre - Big SE Amp

[surfsup]

Mine does a very nice clean to mean for a SE now. At 7 its practically a jazz amp playing lightly. At 10 on my guitar pot, its very dirty. The MV really changed the way the amp works. My scope should be here friday, just in time for two weeks travel for business, sigh...

[Berger]

It always seems that way, that a new piece of equipment shows up right when you have to leave...

I agree the MV is a nice change. I already have a champ clone that I can crank and get that power amp saturation...so its nice to crank the preamp and get that different distortion..or whatever its called these days.

Has anyone played with the cathode bypass capacitors? I got some on-off-of switches over the weekend and was going to play with them..I know the usual fender/marshall values just wondering if there were any other fun ones.

Aaron

[surfsup]

The cap on my GS2 is switchable to remove it from the circuit. Havent tried diff values though.

[Zippy]

I'm setting up one of my Supre builds with parallel cathode RCs coming off V1 - switch to ground to activate either classic Fender or Marshall values.

[Berger]

put in the on off on switch with the marshall/fender values. I like it..not sure if I like it so much as to drill a hole in the chassis...will be interesting to see later how it affects the tone.

Got to play with the 12bz7 tube in...sounds pretty good cranked..not bad at all.

also realized that I had cathode cap backwards on the 2nd stage..oops...put a new one it and the negative feedback loop works a lot better amp as a whole sounds better..oh well..

[angelodp]

Berger, great stuff on your amp, been diggin the clips and sounds. MV ...hmmmmm.....

[Berger]

Thanks!

Its been a fun amp to play with. It was my goal with it to try things that others had done in this thread as well and other things I had read over the years. Its been a great learning process.

The MV is interesting.If I was going for a normal cranked champ I'd leave it out.
But I was looking for making a combo that wouldn't get too loud but still get some crunch to it..I'm getting there, slowly, but surely

I believe rj said some others had ordered the kit. Hopefully they'll start posting as well and maybe they'll have some different ideas that'll add to this great amp.

Aaron

[RJ Guitars]

Yeah we have a couple more that are waiting on me to get back from travel and I also need to get Zippy his boards so we could have several going here in the next few weeks.

I got really busy with orders and then prep for this travel so I haven't done the final tweaks on my own yet. I was able to put together a nice little head cabinet and have thoughts about occasionally using this amp for my rare gig work. I am trying to force myself to complete a bunch of the half finished amps in my garage and make them either gig or market ready before I tear into the next bright idea that strikes me. I have actually made good progress at this in the past couple months.

changing subject here - Can you tell there is a boost difference when you use the 12BZ7?

[Berger]

changing subject here - Can you tell there is a boost difference when you use the 12BZ7?

There is a bit of one yes. I'll need to record it and compare to really know for sure. If anything it looks cool next to the output tube

To my it seemed to break up a bit better and have a better response...but recording would be the true test.

I'd also like to see what 2 of them would do in the amp..I did get my self another 9pin socket.....

Aaron

[Colossal]

If anything it looks cool next to the output tube

That's important to the tone! Put a blue LED under it for added blues mojo!

[Berger]

The tone is in the blue led..all pedal makers know that!

I got my tag strips today and got to wire up the third triode...fired it up and squeeeelll...guess its not so easy

These tubes are layed out so weird that a bunch of wires had to cross. So I moved some and made it better..then still had some wire distortion. Changed the bias on the second triode, but still not the best...

So I'm going to make some changes...
Use the 2nd section as the input, section 1 will be a gain stage before the tone stack and then section 3 will be the recovery after the tone stack...hopefully that'll keep too many wires from crossing..and still give me some gain.

If anyone else has some ideas on how to use the three triode stages, please let me know

and this is subject to change as I stare at the schematics/layout/etc more and more

Aaron

Edit: just got done wiring it in 4-4-0 ax84.com way minus the 2 bypass capacitors.
No more squeals and sounds decent..not too much gain, but I'm sure the bypass caps will help with that..
another edit: what are the odds I'm running into blocking distortion? time to go read...

[Berger]

got to play through the amp a bit more tonight.

with the 6ac10 dimed with the tone stack bypassed it sounds great! The master volume helps a lot.
Oddly enough the tone stack really drops a lot of the signal...could I have something wrong?
I had modded the bypass and signal caps and now I probably have too much treble. My new caps came in today so I'll change them and hopefully it'll sound better.

No videos hopefully some soon

[Berger]

A couple video updates
6ac10 tube with the volume cranked with the tonestack engaged and the master volume about 9 o'clock
So pretty much saturation of the preamp.
http://www.youtube.com/watch?v=Qs1cLR_GR6I


6ac10 tube with the volume cranked with out the tonestack engaged and the master volume about 9 o'clock
So pretty much saturation of the preamp.
http://www.youtube.com/watch?v=dwtKDkXrc4Y

Playing through my strat copy now so the sound is different.
You should be able to hear the increase of treble that I talk about in the previous post.

Aaron

[mrvfr]

Newby here on the wait list for a kit - no mods planned until I get sound vs. smoke out of it first. Thinking an EL84 would be interesting eventually and doing it w/ parts and not resorting to a yellowjacket.

[M Fowler]

You could punch the EL84 power tube socket and wire it so you can switch between 6V6 or EL84 or (both parallel power tubes).