high gain lee jackson gp 1000

[Gorhrut]

rune, i dont think anyone meant to second guess your knowledge of this preamp. they are just offering suggestions based off of what i asked for. btw, a lot of the people on here are professional guitar/amp techs. they really do know quite a bit.

[roberto]

So don't come teaching me about the GP-1000, I've dealt with the amp and it's possibilities for more than a decade now.

I understand. In fact after a few calculations we can expect something like 9.3132257e+50 different combinations on that schematic.
Ten years are 87600 hours, so around 1.0631536e+46 different mods every hour.
That means one mod every 3.3861523e-43 th of second.
I'm way slower. Can't compete.

Now it is easy to misunderstand the unit, because it is very unique.

Rune, nobody here want to "compete", neither "attack" you. We are just talking about this system, that is nothing more than a clean fender plus a marshallish like two stages for the lead.
It's in the eq-to-shape-your-OD design area.
Anybody can suggest ideas because the brain is not patentable.

Hope it helps to keep the whole situation quiet.

[Bob Simpson]

"Cute that you guys are discussing my auction and my knowledge on this forum. "

Interesting you chose to use your first impression, and only post, to scan for your auction and thump your chest...

"So don't come teaching me about the GP-1000, I've dealt with the amp and it's possibilities for more than a decade now. "

So who cares?
There's a guy named Bill Burgess you need to buddy up with...
You're sure to hit it off...
He made a lot of friends here, too.

"And I have a whole offical Bodom forum to proof that I know the mods Alexi had/have in his now retired GP-1000."

Oops...
So who cares, again... redundant response...

[Gorhrut]

epiphany!!! would it be possible to add an LED/other diode between 2 of the gain stages? would this give more gain/different distortion characteristic?

[Jana]

But . . . But . . . Where's the "Talent" knob?

[Gorhrut]

who needs talent? thats why distortion was added to amps in the first place right? cover up mistakes. haha jk.....

[Gorhrut]

what do you guys think of these mods?

[IMG2178]http://i.imgur.com/gvCd9GD.jpg[/img]

[roberto]

How did you jumped on that?

[Gorhrut]

sorry, dont really understand your question.

are you asking how i got these mod ideas?if so, i studied pics of another modified lee jackson preamp. and a bit of advice from the owner.

[roberto]

Can you post the internal photos of that unit?

I'm not strictly interested in the sound you are looking for, I'm just looking if some mods are feasable.

I personally don't care about the caps at the output.
As I already explained, poweramps have usually 1M input impedance, inparallel with the 1M output impedance we'll obtain a 3Hz high pass filter.

I'd go to remove the 470p across the triodes (why waste a clean when you can adjust the lead?) and separate the first two triodes' supply.

The led can create asymmetry, but I'd move it downstream, with a resistor in series (again, why waste a clean, blabla).

One hundred people will give you one hundred different solutions.
Try those ones and report your impressions.

[Rune]

That would get very noisy, did Jon recommend those mods? I know only one guy except him who got a modification that reminds me a little bit of yours. A guy who wanted to sell a modified original Lee Jackson GP-1000 88'er a couple years ago, but for a blood price of €600. Said he was moving to Brazil and needed to free som cash.

And for those reacting on my first post, that meat&beer guy and Gorhrut was talking down my auction and calling me a lair. Im sorry I came out a bit furious, but my intention was just to clarify my auction and modification(s).

[Meat&Beer]

Rune,

I never called you a liar. At that point in our correspondence, all I had was what you told me. Could've gone either way, ya know? I didn't want to go suggesting Gorhrut to do something I wasn't sure about, given my (at the time) uncertain source, and your seemingly secretive nature. After my 2nd post on this thread, is when you sent me an actual picture of the mod in your unit, thus confirming the mod, and the OP had already in fact done that anyway.

Concerning your schematic and notes that you'll only release to the person buying the unit. We all realize and empathize with the amount of research, and trial and error involved when trying to replicate a popular sound or idea. I was merely trying to help out a fellow high gain (and metal) fan by seeing if I could get some information on this unit for him. Posting said schematic here certainly won't hurt the possibility of a sale for you. That's what we do here, share knowledge, and collectively grow our craft, as well as the wealth of information this forum encompasses.

Your asking price is very reasonable for this preamp. I was going to mention how the shipping cost was the deal breaker for me, not that it was unreasonable at all, (International transactions are pricey) But, I just noticed you've changed the listing. I'll be in contact.

Hopefully there are no hard feelings. Like I said, just trying to help out. A small timer like me has all he can do to put fourth a fraction of the help he's received from the excellent ladies and gentlemen that are constantly and selflessly supportive here.

Welcome to the forum, hope you'll stick around!

Cheers!

Chris

[Meat&Beer]

Gorhrut,

It's already been mentioned by Rune, but do you have, or something comparable to, Alexi's signature guitar? I owned the AL-600 a while back, flipping awesome guitar, no idea why I got rid of it to be honest. (Probably to buy a different V ) It didn't have the onboard preamp, it was stock with the passive EMG-HZ. It sounded wicked, very similar to the Bodom sound circa AYDY. (Though I didn't know it at the time, that album wasn't out yet.)

I was playing through an Engl 620 preamp into a Randall solid state power amp. (I have a recording of a song that's very reminiscent of this tone I can upload if there is any interest.)

Back when I was actually researching his sound, fresh after Hate Crew Deathroll blew my head clean off, I seem to remember he was toting an Engl power amp in his rig. Maybe someone can confirm that? Just some thoughts on the matter.

[Gorhrut]

That would get very noisy, did Jon recommend those mods? I know only one guy except him who got a modification that reminds me a little bit of yours. A guy who wanted to sell a modified original Lee Jackson GP-1000 88'er a couple years ago, but for a blood price of €600. Said he was moving to Brazil and needed to free som cash.

And for those reacting on my first post, that meat&beer guy and Gorhrut was talking down my auction and calling me a lair. Im sorry I came out a bit furious, but my intention was just to clarify my auction and modification(s).

never meant to call you a liar.(i dont think that i did, but whatev) and i am just trying to get info on mods same as you were a couple years ago. yeah, i did get the info from jon. twcc also gave me a tiny bit of guidance but nothing specific. i asked you, twcc, rr480 and jon about mods. i understand you and twcc are making money off of the mods and i offered to pay for the info, jon was just the first taker. remember, you guys made copies of a preamp someone else made and are making money off of mods that someone else came up with for this preamp. (not intended to start an argument, im just sayin'.....)

so, is jon's unit different than the other gpsps? are the mods ive shown vastly different than the ones alexi had done?

[Gorhrut]

Gorhrut,

It's already been mentioned by Rune, but do you have, or something comparable to, Alexi's signature guitar? I owned the AL-600 a while back, flipping awesome guitar, no idea why I got rid of it to be honest. (Probably to buy a different V ) It didn't have the onboard preamp, it was stock with the passive EMG-HZ. It sounded wicked, very similar to the Bodom sound circa AYDY. (Though I didn't know it at the time, that album wasn't out yet.)

I was playing through an Engl 620 preamp into a Randall solid state power amp. (I have a recording of a song that's very reminiscent of this tone I can upload if there is any interest.)

Back when I was actually researching his sound, fresh after Hate Crew Deathroll blew my head clean off, I seem to remember he was toting an Engl power amp in his rig. Maybe someone can confirm that? Just some thoughts on the matter.

ya, i just got a jackson rr24. had it for maybe 2-3 months. i have the emg alx set which isnt exactly what he uses but pretty close. alexi uses emg hz h2 with the mm-04 booster. he uses switches 2 and 4 on, which sets his res freq at 3khz. the closest that the alx gets is 2.44khz or 3.33khz.

i personally never had an engl preamp, but ive used the tsc x30 sim of the e530. it sounded pretty cool with different cab impulses.