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Messages - GLUGSTER

#1
Amplifier Discussion / Troubleshooting a power section.
September 26, 2009, 10:26:49 PM
My friend owns an Hughes & Kettner Warp 7 combo. Recently, the power stage is starting to make weird "ring modulated" and other static type of noises, not right away, but after about 5 minutes or so of being used. The local repair guy "fixed" it once for this, but it started making these same noises a month later. Now he won't touch it with a 500' pole. I also cannot find any schematics for this amp anywhere. Any help on this subject would be awesome!!
#2
Quote from: J M Fahey on February 11, 2009, 12:32:14 PM
Excuse me Glugster but your explanation is somewhat confusing, at least to me (sorry).
I guess what you say, but I shouldn´t be guessing, just concentrating in your problem.
You speak about a Zoom , but you don´t name it in your signal chain. (A bit like starting to tell a story about "Joe" and others, later talking about "my brother" and later saying something about "the skinny one") are rthey the same or not?, confusing.
As far as I understand, you have two multi-effects, an RP350 and a "Zoom", although you talk about a G7.1ut
You also talk about a BBE 482 ¿Why?
And you are two different people, presumably with different guitars.
The basic point to get a valid comparison is to reduce the "extra variables" to a minimum.
For your comparison to be valid, you should plug your guitar, with an Y cable or a splitter box (very easy to improvise) into the Zoom and the RP350, and rig a switch (footswitch or friend/buddy/girlfriend operated) to be able to send either of your signals, switching quickly, to the same amp/cab or even a combo.
The human ear has *very* short term memory, so switching quickly back and forth, even within the same chord, ensures the best comparison.
Please try something like that, you´ll be surprised at the incredibly small nuances you'll be able to detect.
Cheers.

See, I think that my explanation is VERY clear. To answer another one of your questions, the BBE was used for level monitoring as I explained. What I tried to do with my experiment was to show that the output of the Zoom G7.1ut was different or incompatible with the other pieces of gear. As far as all the other scientific testing (swapping cords, guitars etc.) from one side of the chain to the other, I did all of that as well. We aren't talking about some *subtle* little problem here. The Zoom has an impedance mismatch that make the other pieces incompatible. I figured this problem out though, by using a Behringer G100 DI box. The DI buffers the signal, and changes the Zoom G7.1ut's output making it useful again. I hope that clears things up for you and thanks for responding.
#3
I am at a loss. What is the deal with Zoom? All the other processors' output are rated at dBu. Zoom's: DBm. What is the difference? I tried to research the relationship on Wiki and I found it really difficult to understand. I did get this though:




I just don't understand, what does it mean?....Why am I asking this question? what does this have to do with MFX? Simple. DBm doesn't interact with a power amp properly. The experiment I did was to plug both sides of a a QSC into stereo sides of a 4-12. So here is how I did it:

guitar 1=>G7.1ut=>BBE 482 ch. 1=>QSC left side=>left side of a Carvin cab
guitar 2=>RP350=>BBE 482 Ch. 2=>QSC Right side=>right side same cab

I played through the Zoom, my buddy played though the RP350. I was peaking out the BBE and the tone was really bad, plus the output was pretty low. My buddy playing though the RP350 however WAS NOT peaking the BBE, and he was VERY LOUD and clear. So does the Zoom's DBm leveled outputs have the wrong impedance or is something else going on?
#4
Amplifier Discussion / Re: Op amps in Yamaha G100
January 19, 2009, 06:41:33 PM
Sounds like elective brain surgery.
#5
Amplifier Discussion / Re: What happened to Crate?
January 15, 2009, 09:55:23 PM
Quote from: J M Fahey on January 15, 2009, 12:57:14 PM
As far as I know, SLM was sold a couple of years ago to LOUD Technologies , including Crate and Ampeg trademarks. They closed their almost 200 employee plant in USA (keeping only some administrative and technical personnel) and set up factory in Viet Nam, currently cheaper than China. *Maybe* they perceive Crate as a "lesser" brand, which I regret. Their products are good, innovative, and , under the skin, the same as modern so called "Ampegs". If somebody has fresher news than mine , please post them.

This is congruent to what I have heard, except there doesn't really seem to be any new models for awhile, and GC/MF seems to be blowing out their entire inventory. I like Crate, and like Eminence, I feel their tone and general build quality has improved in recent  years. Idunno about the quality of the Vietnamese stuff, I guess time will tell.
#6
Amplifier Discussion / What happened to Crate?
January 14, 2009, 10:16:01 PM
Love 'em or hate 'em, Crate is one probably one of the most  controversial names in amplification. I have heard rumors that SLM is planning on discontinuing the brand, and I've also read that Raven amps are really the new Crate. What is really going on? Does anyone know?
#7
Amplifier Discussion / Re: Fender Cyber Champ...Win!
January 13, 2009, 07:19:26 AM
Quote from: FrugalGuitarist on January 12, 2009, 12:08:35 PM
Quote from: GLUGSTER on January 12, 2009, 09:18:30 AM
....I haven't read one bad thing about them. Line 6 has the Spider Valve, PV's got the Vyper tube 60/120, H&K has the Switchblade and now Fender has this. I think the next logical step Fender will do is make a higher wattage head or bigger 2-12" type of version of this amp.

I'm actually referring to the Cyber Champ (the same series as the Cyber Twin) which is the predecessor to the current Super Champ XD and originally released back in 2003 then discontinued in 2005.  This is their DynaGain analog preamp with digital control/effects and a gigable 65 watt solid state power amp. The new Super Champ XD is s digital preamp/effects into 15 watt tube power amp.
Sorry about that....
#8
Amplifier Discussion / Re: Fender Cyber Champ...Win!
January 12, 2009, 09:18:30 AM
Quote from: FrugalGuitarist on January 12, 2009, 09:06:46 AM
I'm writing up a head to head on Fender's Cyber Champ vs their new Super Champ XD in the current FrugalGuitarist.com and was recording some tracks with the Cyber Champ over the weekend...

Wow, the amp records fabulously well. Per their literature, the amp uses their DynaGain preamp digitally switching tone circuits pre or post the preamp to emulate the circuitry of the original amps. I'm surprised there's not more love for them...
....I haven't read one bad thing about them. Line 6 has the Spider Valve, PV's got the Vyper tube 60/120, H&K has the Switchblade and now Fender has this. I think the next logical step Fender will do is make a higher wattage head or bigger 2-12" type of version of this amp.
#9
Quote from: phatt on January 09, 2009, 10:52:32 AM
Short answer is NO don't even think about it.
Long answer is yes but it's going to cost you so much as not to be worthwhile. :'(

On the subject of Efx loops I never found a use for them anyway,
maybe half useful on SState Amps but kinda stuffs the whole magic of tube Amps.
Cheers, Phil Nambour Australia.
I thank you for your response. However, "no don't even think about it" isn't working for me for 2 reasons: 1.Why not? Please explain why these the reverb loop CAN'T be used this way and 2. What would need to be done in some form of an out board conversion box to make this possible. Get technical and include Ohms and all that if possible. I guess I want the long answer.
#10
Quote from: JVandenberg on January 04, 2009, 06:03:30 PM
I  I also have had great luck with Peavey's Bandits. 
Amazing! I thought I was the only human on Earth that likes the Bandit!!
Anyway, MICing an amp of any sort is really not optimal for computer recording. DI modelers and pedals can yield very good to excellent results. Many pros have used a Line 6 POD for both recording and playing live. A DigiTech RP500 plugged into a PV Bandit's FX return would also be a great rig....whatever you do I recommend a modeler into an amp's FX return.
#11
Preamps and Effects / Re: Best / Favorite DI
January 09, 2009, 09:02:44 AM
Quote from: syndromet on January 09, 2009, 08:42:52 AM
I don't really see why you would want a DI in that setup at all? You are not running directly to the PA, and I suppose you are not going to run long lenghts of cable. The Digitech don't have a balance input, wich means your signal won't be balanced anyway. That means that you'll only change the impedance of your signal, wich means that the digitech won't see the signal it was designed for. I bet a DI in your chain will do more bad than good, and I bet something like this will bring you closer to what you're looking for.


Good call! I love my BBE SS!
#12
I had an old Marantz stereo that I had to turn up really high to get it to work. It would than crackle a bit and work for a while before needing to be cranked a few times to get it to work again. I always thought it was dust in the pots. Take it apart and spray contact cleaner into the pots. It couldn't hurt and it just might work!
#13
Amplifier Discussion / Peavey Vyper
January 09, 2009, 08:03:50 AM
Anyone try one of these new Peavey Vyper amps out?What did you think? Is the modeling better than others out there? Any thoughts or opinions would be cool to read.
Thanks!
#14
I recently acquired a '66 Fender Super Reverb. The reverb tank is connected by two RCA connections (one in, one out). This to me looks a lot like an FX loop. I am wondering if it would be possible to use this in-out as an FX loop. Since this is a valuable amp and I don't want to screw it up, I am wondering if anybody has successfully done this and if some kind of impedance matching device needs to be instituted. Thanks again folks!
#15
The Newcomer's Forum / H&K Warp 7 preamp problems
January 09, 2009, 06:49:45 AM
I own a Warp 7 212" combo from Hughes & kettner. When I plug into the main input the intermittent volume fluctuations. This is a reported problem in more than one user review from the posters over at Harmony Central, so I'm guessing this issue is not an isolated indecent. I know the problem rests in the preamp voicing section because I mostly use this amp's FX loop return with a modeling pedal to do the voicing, and have no problems with the amp's power section. Any ideas on what would be going wrong with the preamp section to bring these problems on would be greatly appreciated. Thanks again!