Search found 20 matches

With your Boss GE 7 try this. Turn the lowest slider all the way down. Turn the next one all the way up. Alternate like this for all the sliders except the volume. Start there and tweak to taste. It s ...

I didn't like the Ruetz mod. It took away the "ratness" of the Rat. It lowers the amount of treble boost in the first(?) gain stage which gives the effect of less distortion and extended low ...

If you're a tweaker who likes to experiment with sounds, you'll love it. There are no reverbs, it's all echo and modulation effects, but it takes those effects to the nth degree with all the possibili ...

It definately can be done. The only issue is whether the transformer can supply the extra heater current, but that shouldn't be a problem if you're just adding a couple of 12ax7s. A Bassman style prea ...

A simple, easily reversible mod for these UL amps is to disable the negative feedback loop. The easiest way to do this is to locate the 100 ohm resistor in the feedback loop and short it to ground. Th ...

Alesis Nanoverb is a small 1/3 rack space unit thats not much bigger than a pedal and works great. Other possibilities, EH Holy Grail, Yamaha Magic Stomp, Zoom 505.

Sounds good. How much are they and where can I get one? Also, can anyone recommend a good in circuit transistor checker?

Mouser has some polyester film caps by Cornell Dubilier up to 10uf @100 or 250 ...

Toroidal transformers are lighter but also more expensive.

I'm not sure why the harmonics produced by switching power supplies are such a disadvantage. Conventional power supplies also produce a harm ...

My condolences for the loss of your friend.

You can use a single 4 ohm or two 8 ohm speakers in parallel. If it's the later 135 watt model, you can also plug an additional 4 ohm load in the extension ...

The extension speaker jack in the 135 watt, ultralinear Twins is a little different. It's a switching jack that puts the extra speaker cab in series, not parallel with the internal speakers. So if the ...

I've heard good reports of installing a 12" speaker in the 10" hole without cutting a larger hole. There is a little overhang, but not as much as you might think. Anyone have experiences with doing th ...

I would like to see manufacturers go further with the lightweight concept, neodymium speakers, toroidal transformers, aluminum chassis, light but strong cabinetry. It would be expensive, but worth it. ...

Lexicon uses a 9vac power supply. You might try them.

Does the Vegas have sockets for the op amps so you can just plug the new ones in?

Some other mods you can do are disable the negative feedback loop. The ultralinear out put is a sort of built in neg. feedback. The result is a livelier, looser sound. It will also be a little noisier ...

One of the reasons the later silverfaces have more headroom is the higher plate voltages on the output tubes.

I may be wrong, but I don't think the 69 twins had the higher voltages yet.

Dave Rich

An A/B box would work.

This should make the pedal less bright and less volume. Your result seems contrary to what I would have thought.

Make sure your meter is set to ohms. Measuring tip to tip, and sleave to sleave,you should get not more than a couple of ohms. i.e. zero ohms would be a perfect conductor.
Also measure tip to sleave ...

If the amp is 25 years old and has never had a cap job, and it's humming. I'd say it definately needs new caps.

Author	Message
Topic: dobro simulation
David Rich Replies: 22 Views: 5415	Forum Section: Electronics Posted: 16 Nov 2007 12:51 pm Subject: dobro simulation
David Rich Replies: 22 Views: 5415	With your Boss GE 7 try this. Turn the lowest slider all the way down. Turn the next one all the way up. Alternate like this for all the sliders except the volume. Start there and tweak to taste. It s ...
Topic: Proco Rat mods
David Rich Replies: 10 Views: 3386	Forum Section: Electronics Posted: 16 Nov 2007 12:35 pm Subject: Proco Rat mods
David Rich Replies: 10 Views: 3386	I didn't like the Ruetz mod. It took away the "ratness" of the Rat. It lowers the amount of treble boost in the first(?) gain stage which gives the effect of less distortion and extended low ...
Topic: Lexicon Vortex.....anyone use it?
David Rich Replies: 6 Views: 1062	Forum Section: Electronics Posted: 14 Aug 2006 7:30 am Subject: Lexicon Vortex.....anyone use it?
David Rich Replies: 6 Views: 1062	If you're a tweaker who likes to experiment with sounds, you'll love it. There are no reverbs, it's all echo and modulation effects, but it takes those effects to the nth degree with all the possibili ...
Topic: SS preamp to tube preamp conversion??
David Rich Replies: 5 Views: 914	Forum Section: Electronics Posted: 2 May 2006 7:20 am Subject: SS preamp to tube preamp conversion??
David Rich Replies: 5 Views: 914	It definately can be done. The only issue is whether the transformer can supply the extra heater current, but that shouldn't be a problem if you're just adding a couple of 12ax7s. A Bassman style prea ...
Topic: what mods to fender 135 watt twin?
David Rich Replies: 16 Views: 1786	Forum Section: Electronics Posted: 27 Jan 2006 1:24 pm Subject: what mods to fender 135 watt twin?
David Rich Replies: 16 Views: 1786	A simple, easily reversible mod for these UL amps is to disable the negative feedback loop. The easiest way to do this is to locate the 100 ohm resistor in the feedback loop and short it to ground. Th ...
Topic: Best reverb/delay pedal.
David Rich Replies: 22 Views: 1935	Forum Section: Electronics Posted: 21 Dec 2005 4:59 am Subject: Best reverb/delay pedal.
David Rich Replies: 22 Views: 1935	Alesis Nanoverb is a small 1/3 rack space unit thats not much bigger than a pedal and works great. Other possibilities, EH Holy Grail, Yamaha Magic Stomp, Zoom 505.
Topic: Nashville 400 - Fails ESR Testing
David Rich Replies: 20 Views: 4815	Forum Section: Electronics Posted: 1 Aug 2005 7:20 am Subject: Nashville 400 - Fails ESR Testing
David Rich Replies: 20 Views: 4815	Sounds good. How much are they and where can I get one? Also, can anyone recommend a good in circuit transistor checker? Mouser has some polyester film caps by Cornell Dubilier up to 10uf @100 or 250 ...
Topic: Amp Technology
David Rich Replies: 7 Views: 1182	Forum Section: Electronics Posted: 29 Apr 2004 4:54 am Subject: Amp Technology
David Rich Replies: 7 Views: 1182	Toroidal transformers are lighter but also more expensive. I'm not sure why the harmonics produced by switching power supplies are such a disadvantage. Conventional power supplies also produce a harm ...
Topic: Info on Fender Super Six please??
David Rich Replies: 13 Views: 1385	Forum Section: Electronics Posted: 6 Feb 2004 9:24 am Subject: Info on Fender Super Six please??
David Rich Replies: 13 Views: 1385	My condolences for the loss of your friend. You can use a single 4 ohm or two 8 ohm speakers in parallel. If it's the later 135 watt model, you can also plug an additional 4 ohm load in the extension ...
Topic: giving it another chance- Weber Cali in the Twin
David Rich Replies: 25 Views: 2358	Forum Section: Electronics Posted: 19 Dec 2003 11:22 am Subject: giving it another chance- Weber Cali in the Twin
David Rich Replies: 25 Views: 2358	The extension speaker jack in the 135 watt, ultralinear Twins is a little different. It's a switching jack that puts the extra speaker cab in series, not parallel with the internal speakers. So if the ...
Topic: 10" Speaker for Princeton Reverb
David Rich Replies: 28 Views: 3402	Forum Section: Electronics Posted: 1 Dec 2003 6:55 am Subject: 10" Speaker for Princeton Reverb
David Rich Replies: 28 Views: 3402	I've heard good reports of installing a 12" speaker in the 10" hole without cutting a larger hole. There is a little overhang, but not as much as you might think. Anyone have experiences with doing th ...
Topic: Neodymium speakers
David Rich Replies: 28 Views: 4269	Forum Section: Electronics Posted: 14 Nov 2003 1:02 pm Subject: Neodymium speakers
David Rich Replies: 28 Views: 4269	I would like to see manufacturers go further with the lightweight concept, neodymium speakers, toroidal transformers, aluminum chassis, light but strong cabinetry. It would be expensive, but worth it. ...
Topic: power supply for Alesis Microverb?
David Rich Replies: 8 Views: 1656	Forum Section: Electronics Posted: 24 Mar 2003 9:41 am Subject: power supply for Alesis Microverb?
David Rich Replies: 8 Views: 1656	Lexicon uses a 9vac power supply. You might try them.
Topic: peavey vegas mod
David Rich Replies: 8 Views: 1319	Forum Section: Electronics Posted: 11 Oct 2002 12:26 pm Subject: peavey vegas mod
David Rich Replies: 8 Views: 1319	Does the Vegas have sockets for the op amps so you can just plug the new ones in?
Topic: Removing Fender Twin Master Volume
David Rich Replies: 8 Views: 2442	Forum Section: Electronics Posted: 27 Aug 2002 5:33 am Subject: Removing Fender Twin Master Volume
David Rich Replies: 8 Views: 2442	Some other mods you can do are disable the negative feedback loop. The ultralinear out put is a sort of built in neg. feedback. The result is a livelier, looser sound. It will also be a little noisier ...
Topic: Blackface to Silverface conversion for Twin Reverb?
David Rich Replies: 8 Views: 2065	Forum Section: Electronics Posted: 29 May 2001 5:41 am Subject: Blackface to Silverface conversion for Twin Reverb?
David Rich Replies: 8 Views: 2065	One of the reasons the later silverfaces have more headroom is the higher plate voltages on the output tubes. I may be wrong, but I don't think the 69 twins had the higher voltages yet. Dave Rich
Topic: Vegas 400/ using 2 channels question
David Rich Replies: 2 Views: 1006	Forum Section: Electronics Posted: 17 Apr 2001 7:22 am Subject: Vegas 400/ using 2 channels question
David Rich Replies: 2 Views: 1006	An A/B box would work.
Topic: Bridging a resistor on volume pedals
David Rich Replies: 25 Views: 2970	Forum Section: Electronics Posted: 13 Apr 2001 12:20 pm Subject: Bridging a resistor on volume pedals
David Rich Replies: 25 Views: 2970	This should make the pedal less bright and less volume. Your result seems contrary to what I would have thought.
Topic: Electrical chord test?
David Rich Replies: 8 Views: 2072	Forum Section: Electronics Posted: 10 Apr 2001 9:10 am Subject: Electrical chord test?
David Rich Replies: 8 Views: 2072	Make sure your meter is set to ohms. Measuring tip to tip, and sleave to sleave,you should get not more than a couple of ohms. i.e. zero ohms would be a perfect conductor. Also measure tip to sleave ...
Topic: Cap symptoms
David Rich Replies: 6 Views: 1642	Forum Section: Electronics Posted: 10 Apr 2001 8:22 am Subject: Cap symptoms
David Rich Replies: 6 Views: 1642	If the amp is 25 years old and has never had a cap job, and it's humming. I'd say it definately needs new caps.