#1
Hey, I'm searching for simple (or maybe not) mods for the gain channel of the Crate V33-212.

I've found a few different mods for the V33 head (which all seem in good review) but as I understand it, the Crate V33 Head and the combo have quite different wirings.

Does anyone have any information or experience with modifying the Crate V33-212?


Thanks,

-Josh

TL;DR - The V33-212's gain channel sucks, and I'd like a mod, but can't find any schematics.
#2
Quote by roshjosh
Hey, I'm searching for simple (or maybe not) mods for the gain channel of the Crate V33-212.

I've found a few different mods for the V33 head (which all seem in good review) but as I understand it, the Crate V33 Head and the combo have quite different wirings.

Does anyone have any information or experience with modifying the Crate V33-212?


Thanks,

-Josh

TL;DR - The V33-212's gain channel sucks, and I'd like a mod, but can't find any schematics.

but they are so helpful. we'd need one if we could help. although i might not be much use myself.
#3
I'm pretty sure the SLO mods are applicable to the V33 combo.
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#4
Quote by Raijouta
I'm pretty sure the SLO mods are applicable to the V33 combo.
Really? REALLY?

What are you basing this on? TS hasn't mentioned any specifics about the mods he's looking at. How can you know if a Mod for a Soldano SLO will apply? Are all the circuits for Crate V33 identical to the Soldano SLO? Links to schematics, please. Or links to the specific mods you're talking about. Or links to anything that supports this claim.

If you're just parroting something you heard somewhere, without any first-hand knowledge, please don't. If you do have first hand knowledge, please continue. Tell us more.
Meadows
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#5
Quote by SomeoneYouKnew
Really? REALLY?

What are you basing this on? TS hasn't mentioned any specifics about the mods he's looking at. How can you know if a Mod for a Soldano SLO will apply? Are all the circuits for Crate V33 identical to the Soldano SLO? Links to schematics, please. Or links to the specific mods you're talking about. Or links to anything that supports this claim.

If you're just parroting something you heard somewhere, without any first-hand knowledge, please don't. If you do have first hand knowledge, please continue. Tell us more.


I believe he means the mods to make a V33H like a Soldano SLO.

Slow down a bit sometimes SYK. It'll make you look less like a douche sometimes.

It doesn't make sense to me that Crate would make two entirely different boards for two amps when they could make a board to use for both amps. Saves money.

http://blueguitar.org/new/schem/misc_mod/crate_v33_soldano_conversion-layout.jpg
http://blueguitar.org/new/schem/misc_mod/crate_v33_soldano_conversion-schem_power_amp.jpg
http://blueguitar.org/new/schem/misc_mod/crate_v33_soldano_conversion-schem_preamp.jpg
#6
The V33-212 combo has the same circuitry as the Head model. I know because I just modded my combo using the Head mods. In fact, I read that the Head model circuit board says "V33-212" on it.

Here are some mods that make the over drive channel WAY better:

I used these mods for a Great result: http://dnator.50webs.com/index.html

DvNator is great - very informative and sharp. Check out the clips of it. There are sort of two versions - A set of mods to fix up the over drive channel and a "High Gain" set that goes a bit further. I did the first set and it sounds Great!

These are the "Soldano" mods: http://www.ppwatt.com/node/16193

They don't convert your Crate into a Soldano but they do sound good. I think there are clips posted of it. There is a layout posted there showing the mods. (See XgamerGt04's links) Steve is an excellent tech and he and DvNator discuss the various mods so you can get in on what they are doing.
Here's a link to a guy who did the Soldano mods and posted all the part numbers from Mouser Elec. http://www.agileguitarforum.com/viewthread.php?tid=17853

You can get schematics from Crate. They are very friendly. If not, I can send you a set.

This is a fine amp to mod, and fun. When I got mine I was disappointed in the OD channel and resorted to using stomp boxes for drive sounds (TS808, Blues Breaker, etc.). But doing the mods was like getting a brand new amp that sounds great! I can still use the boxes for thrashing, but if that's what you want you can do the High Gain mods or the Soldano mods to get there.

Anyway, have fun and be careful,
Ken
Last edited by sepulchre at Dec 26, 2009,
#7
Did you try DVNATORS mods before you performed the SLO mod?

From what I could gather you couldn't keep the second channel with the wagdog version of the SLO mod but Steve Alohas you can.

I want to keep both channels and keep the core clean feel and make the second channel usable. I read all of the posts on 4 forums and I think people got off track at some point due to the SLO mod changes.

Having to read all the old post wankering is a pain.

http://dnator.50webs.com/index.html

http://acapella.harmony-central.com/showthread.php?t=2118282

http://www.blueguitar.org/new/schem/misc_mod/crate_v33_soldano_conversion-layout.jpg

I have a V33H and V33-212. I plan on modding on and using the other to do a comparison so I can tell if the changes were worth it.
#8
I didn't do the SLO mods on mine, wagdog or Steve's. I did the dnator mods on mine and still have both channels. I sometimes use this amp to play an acoustic guitar through so I wanted to retain the clean channel. I highly recommend his mods; my amp's OD channel is Killer now and the clean channel sounds stock - clear and bright with lots of body.

Almost all the mods I did were to the preamp section. The only mod I did to the power section was to swap out a capacitor - C61, replacing the original 100uF with a 220uF. It was the only mod I did that required the removal of the circuit board from the chassis. If you don't want to remove the PCB (it's kind of a pain for one mod) you could just add a 100uF capacitor to the leads of R94 which is, I believe 82 ohms at 7 watts. Just make sure you've got the polarity right. The results would be like replacing the original 100uF with a 200uF C61 cap and much simpler. I think the difference in the sound would almost negligible. The larger cap tightens up the bass. Dnator talks about replacing R94 but upping the current there could shorten output tube life and would definitely be a strain on the power transformer, so I didn't do it. I talked to dnator and he said it wasn't really necessary anyway.

I envy you having two of these to play with. Doing a comparison would be cool. I have a friend with the same amp I have (V33-212) but he lives in the mountains of California, 1500 miles away, so I doubt we will get to compare our amps. But I would really like to have a second one to try the Soldano mods on. I like the way mine sounds now so I don't want to mess with it, and the SLO mods are more extensive, cutting out many components and adding a switch to get the clean channel back on Steve's. But they look like a lot of fun (I love doing this stuff) and I'd like to see what kind of sound they give.

Since I don't have another amp to play with I'm going to build one - an AX84 High Octane, I think. I was going to build a TrainWreck clone but they are Very loud and have no master volume; great for on stage but not so much for around the house. Lol!

Good luck with your mods and let me know how it goes. If you want I could give you a list of everything I did, it's not that much, really.

later,
Ken