Quote from: mensur on January 30, 2011, 10:16:14 AM

Quote from: phatt on January 30, 2011, 07:31:29 AM
Hi Steve,
             Your Valve section may need some fine tuning.
i.e. add some series resistance after each triode,, you've got some ugly blocking type distortion which is destroying the sound. (but if that spitting distortion is to your taste then go for it.)

You may wish to look at the redneF Pro Junior preamp setup for some good ideas.
Or even some early Deluxe tone circuits might interest you.

Other than that It's a *Very clever idea* and good on you for having a go.
Thanks for sharing your ideas. :tu:

If it interests you I have had good results by power soaking a small PP Amp and ReAmplifiying it via a simple voltage divider setup and then into a large 120Watt SS Amp. (You get to do post power tube EQ effects that way)
Cheers, Phil.

Phil can you post the schematic of that, it;s very interesting?

Mine won't qualify as *Clever* as this one here
but yep like all these things mine can do tricks that some of the others can't do.
I'll run a new thred for you. :tu:
Cheers Phil.

Hi Steve,
             Your Valve section may need some fine tuning.
i.e. add some series resistance after each triode,, you've got some ugly blocking type distortion which is destroying the sound. (but if that spitting distortion is to your taste then go for it.)

You may wish to look at the redneF Pro Junior preamp setup for some good ideas.
Or even some early Deluxe tone circuits might interest you.

Other than that It's a *Very clever idea* and good on you for having a go.
Thanks for sharing your ideas. :tu:

If it interests you I have had good results by power soaking a small PP Amp and ReAmplifiying it via a simple voltage divider setup and then into a large 120Watt SS Amp. (You get to do post power tube EQ effects that way)
Cheers, Phil.

Thanks for the crarification,   Tis all good then, :tu:.
Phil.

Hi KMG,
         Sorry if I misread your schematics but they are quite hard to follow.
From what I see your EFX loop is wired as per my rough drawing.

If this is not right then please correct me.

If it is right then you are walking into trouble as the signal can suffer massive loss and the tone controls under some conditions will hardly be working.
Phil.

Hi rodriki,
Should be some here; http://www.ssguitar.com/index.php?topic=1446.0

If they don't work let me know.

As there is not massive interest in plain old Rock guitar sound then I'm not going to wear myself out making clips if no real interest.

From my point of view I go to the biggest shops and I can't find a decent amp so I just built my own.

Have tried;
Carvin Legacy, Fender Cyber twin, and dozens of other Crap gear.
The best of them are only hairs breath better / different than what I can produce from the circuits I've shared here.

Any of the modern stuff can give you distortion but most are lacking in the tone dept.
Phil.

Just quitely, ar-hum.
That efx loop is about the fastest way to stuff up an other wise good system.
Never insert EFX loops at that point in the circuit as it will give Trouble down the track :trouble

I'd hate to see such good work go to waste. 8|
Phil.

OK, ok  I forgot about this one.
Cross my fingers and hope It works for you now. :tu:
Tested them and they unzip ok for me.

One more ; The Tone Brake,
This is just the Cab sim from the JTM Amps but sorted so you can use it with any preamp setup. Use *After distortion ,,not before.
I've built 6 of these and only have one left,, great for recording not so great live but it may work better live depending what gear you use.

My old Quadraverb sounds much more real with this between the recording desk.
It has no distortion on it's own but the tone shaping is very similar to the DDC.
Phil.

Try Again, :grr
Internal shot of the white box, Messy   but works like magic and gives no trouble. 8|
Phil.

Here is a pic of what I've been taking to the music club for the last few months.

A cheap chinese guitar> into PhAbbtone and DDC (now with presense circuit) > a realistic EQ and > an old Laney 35Watt SS Keyboard Amp. I'm having a ton of fun with the cheapest stuff you could buy/build.

Phil.

OK I have been revamping some circuits and finding some small issues so I thought I'd share them with you all.

PhAbbTone output has been tweaked yet again (even less noise) and The DDC circuit has been revisited.

Have been Trying to use a compressor lately and noticed it was all rather noisey so rather than blame the compressor for everything I thought I should take a long look at my own potential mistakes as well.

So a complete breadboard of the tone circuit and DDC and sure enough I was able to improve the noise floor.

Also I wanted to see if the DDC circuit would sound ok running from 12 volt single supply which it indeed does. It might interest those who wish to make a pedal out of the circuit.
Be aware that the tone stack needs to come before the DDC.
Often most stomp units that have any form of tone control insert it *After the dist* and this may leed to a negitive outcome.
At least it will with my setup as the best effect seems to come from the tone circuit being *In Front*.
Add more soon. Phil.

 Hi Mr Fahey, "creeping, flying and jumping musicians" really? 8|
Gee, don't talk about us guitar players like that :trouble

Very funny and yes I know a few muso lads like that. :loco

Yes I second what you say about fets, all the fuss and if one actually compared these circuits to the real thing (Valves) they are just plain jane lame.

As *DJPhil* noted a pain to set each one.

That said I have a simple mu fet booster that I use a lot,, does not qualify as a OD/distorion unit, just a good booster.
Works without issue and the battery lasted for close on a year.
I'll post a schemo if anyone is interested.

Interesting to note I went through many fet circuits while trying to perfect the *PhAbbTone* circuit and even with a bootstrapped fet it just died in the butt and clapped out when you uped the signal. All the way up to 35 VDC supply it was no match for the opamp version which can work from as little as 9 volts.
I did get fets to work but the opamp is miles *less noisey* and ever so much easier to make. (an I hate noisy circuits) :grr

Re Bassman Boss stuff,
My guess is Boss have seen the great success of Teck21's *Character Series* of pedals and jumped on the band wagon, all analog bandpass filtering and tricks.
I did test the Californian model and disliked it straight up, horrible peaky thing.

Now I'm off to practice my flying and jumping routine,,, says a 55 year old fella with a bad back.
Cheers, Phil.

My guess is you can take the signal out straight from the treble wiper,,,
BUT you are then totally dependant on what you plug into next.

My point is sure it works *asis* but why build something and cost cut if it is likely to cause pain and frustration somewhere in the future?

One only has to read the constant flow of interface issues with pedal boards to see that cheap short cuts like this are trouble in the making.

Having simulated the circuit I can see why Joe cool likes it so up to him how he wants to build it but if I did build it,, NoWay I would leave it hanging out like that.

If you want stuff to interface with almost anything then *Buffer* or wear the pain somewhere down the track.
Phil.

Common or Ground is common to both Amp and Speaker,, if you isolate one then there is no circuit path.

You can put it in a metal/ alloy box and ground the box to circuit common and you will be fine.

I make a point of using a short cord from Amp and then a chassis socket for speaker out.
That way it's impossible the plug it in the wrong way.

Amp and speaker Common wires go to pin 1.
Amp Hot to pin 3,, Speaker Hot goes to pin 2.
Datzit.

A 50 Watt Lpad is a bit misleading as it's usually reffering to HiFi system wattage where the Lpad is not passing any low frequency.

Used as a full bandwidth Attenuator you need to derate that wattage,, hence they get quite hot and often self distruct if more than 15 or 20 Watts is passed.

Cheers Phil.

Hi Joe,
         A suggestion if I may.
As a stand alone unit it would be wise to hang a buffer at the end of this.

It's a low imp tone stack which are not as lossy as high impeadance TStacks but just the same the circuit is some what dependant on what it plugs into.

A buffer will fix any interface issues that may arise.

There are a few well known pedals that do as you have done but it's not good design practise.
Cheers Phil.