I saw in the description on the Diaz website that this circuit is patented so I searched for Diaz Reverb and there it was. Detailed schematic and all!

Here's a quick description I found from an owner on Harmony Central: I use a Diaz Vibramaster, it's a straight Fender outboard reverb combined with a Brownface style tremolo and Magnatone tube-drive Vibrato, all in one box. A leftover gain stage is used to give it a selectable boost, because Fender style circuits actually reduce your signal...

Some of you might find this interesting, I scanned it from the bottom of the amp.

Hi all

I gotto modify a Matchless SuperChief amplifier and to make it a bit easier/faster I'm looking for such schematic, the schematic from the reverb-version is also welcome.

Many thanks in advance!

Chris

Audio Matrix, the complete line! Requested by DiscoFreq

I want to add some built-in attenuation to my version 1 Valve Jr. I've done several other mods, and I think adding this one will top things off nicely.

So I ordered an 8-ohm 15-watt mono L-Pad from Parts Express:

I get how to wire it up for operation with an 8-ohm OT and speaker. However, my VJ is setup for 4-ohm ouptut, and I don't want to change it (at least not at the moment :)). So I got the bright idea that I could put an high-wattage 8-ohm resistor in parallel with the L-Pad (across...

This is the first I've seen of this, so my apologies if it's old hat for everybody else:

The Vintage 1/2 watt guitar amplifier offers chimey clean tones, dirty tweed, VOX at the top, all sorts of killer small vintage amp tones at about half the volume usually associated with the RIGHT sound and feel of a good small vintage amp.. Runs off TWO 9 volt batteries.. Very low current draw.. Plugs straight into ANY guitar Cab.

$170. Hmmm. I wonder if this is a Noisy Cricket at 18v or similar...

Hi fellas,

I have a strange thing going on in my fender HRD. It works ok with the stock speaker. But when i try to add an 8 ohm Marshall 1912 on the second speaker plug (making the unit work in 4 ohms as told on the manual), the sound is erratic, goes on and off, the level drops, and then no sound anymore...

I tried the 1912 plugged as the main speaker, works fine. but if I plug the stock speaker in the extension plug, same thing goes again...

The schematic can be found here

Since the two...

I want to replace the marshall style cliff mono jack with a standard switchcraft mono jack. How can I do this? I see that there are 4 poles on the Cliff jack and don't quite understand how I would alleviate 2 of the poles. Anyone know how to do this?

This is the tone stack of my Laney HCM15 solid state practice amp. :oops:
I've always found it quirky in operation; the mids don't quite scoop/boost much (if at all) and the treble side is way too shrill.
The bass control is lacking, but then again, you won't hear much bass out of an 8 speaker I guess... :?

Anyways, I've plugged the values into the Duncan Tone Stack Calculator, and noticed that the sweep describes more or less what I'm hearing from the amp.
Lots of bass sweep from 0 to 5,...

I am building a high gain, submini amp and have been wondering if I will be benefitted by using shields over the preamp tubes. I anticipate having the tubes stick out the top of the chassis for heat dissipation, but have heard that shields can protect against hum, but also can affect tone. Thoughts?

Hi,
I posted the link below in another thread but I think it is better to be in separate one:

Enjoy! :D

I have and old traynor ysr-1 head, that has an 8 ohm output. I recently bought a small used 2 10 cabinet with two 8 ohm eminence ragin cajun speakers in it . The cabinet sounded fine at lower volumes but terrible turned up. I shut everything down and checked the speaker wiring. It was wired in paralel for 4 ohms. I rewired the speakers in series for 16 ohms and tried it again. It sounded great , even at high volume it sounds amazing. My question is , will I cause any damage to the transformers...

I have the two cabs from a Marshall Microstack. They each have a 10 Celestion inside with closed backs. I had been wanting to get a Microstack for the longest time, but for it's cabs only. The head is solid state. I got lucky last month and scored the cabs only for $100. I recently ordered a Blackheart Killer Ant for the head, and I have a Blackstar HT-5H on back order.

My question is about hooking up the cabs to these heads. The original Microstack solid state head was made for the stack and...

For a long time I am looking for two out of print books from Robert G.Wolpert:

- Audio Transformer Design Manual

- Transformer Design and Manufacturing Manual

I know there is a digitized copy on the internet, but I can not find. Does anybody know where can I download it or buy it for a reasonable price?

Hi everyone!

I discovered the matamps amps , and the sound is really good ! Someones has the schématic of those amps ? Espacielly the GTL (or called green ). As I know we can find all we want on Internet (it's crazy!!)

Tanks.

I was reading another thread and in was mentioned that you could build this amp without the tubes and use Jfets. This got me thinking how I have always thought this preamp would be cool to make for my wet/dry/wet rig but I want transistor not tubes for the wet sounds. With a few questions I was able to put together a layout based on my limited understanding of R.G.'s schematic on his site:

Here is my layout:

I would appreciate any comments or corrections and I will try to fix them (I often...

Here's a schematic for the stereo in question. Feel free to critique, or completely redesign, I was just making this up as I go.

It hums a bit and the power tranny gets pretty warm, but sounds better than a $10 set of cheap computer speakers.

I need a little help from all you tube amp gurus. Here's the question - Can the Valve Junior take a tube rectifier, can the stock power transformer handle it, and if it can which rectifier would be best bet? I've got a hole that needs filling :wink: with a tube :whappen:

Cheers, from a tube n00b...

Oh and for reference, I'm talking about the Valve Junior Head - schematic here (version 3):

Lady and guys,
I have a 1961 Blonde Bandmaster that I got in trade from a fellow over 5 years ago. I was completely stoked when I got it and I have fruitlessly spent untold hours going over it piece by piece trying to get a good sound out of it.
The problem is that it has this midrange thing, like a 'plucky' sound to the attack of the note. The note starts with a KLUNK ...and the note blooms from there. It's really obnoxious; my guitar teacher (who used to do session work in Nashville, so he...

Hello all,

I've been out of circulation for a while. I've had precious little free time as of late and, feeling somewhat better (recently diagnosed with Psoriatic Arthritis), I've been spending more and more free time playing and less time breathing solder fumes. It's been good! I was starting to burn out on building pedals.

I've been thinking about building another guitar amp recently (specifically a 5E3 tweed Deluxe) though the cost of such a project has kept me from moving forward on it....

i wanna build an unusual tube/ss hybrid amp. the idea is:

tube preamp
2or3 x 12ax7 in the preamp.
1 channel
mid gain preamp, probably fender style
3 band eq, fender style
volume control

to

tube power amp
single-ended, class a, 1 or 2 tube power amp. 6l6 probably (fenderish tone wanted)
low power (1-10W), good for stuff like home practice and recording
speaker out
transformer-isolated line out

line out to
mosfet/fet power amp
switchable on/off, independent of the tube part
100 to...

That´s definitely Grateful Dead... here in color:

Does anyone know what became of the website that had hundreds of guitar amp insides photos? There's a broken link here called insideamps.com but I'm not sure if that was it or not. :?: