Hello. I was wondering if anyone knew any possible Peavey Mace mods. I picked one of these up REALLY cheap and its got a pretty solid sound. Only problems I have with it is that the mids get really boxy sounding and fairly unappealing when turned up past 3. Also the pre amp overdrive is pretty fuzzy when turned up too high. Also the bass gets really muddy. Any help would be appreciated. Thanks.

This one was sold a month or two on the same site for 400-450 EUR I believe...now on sale again: I bet the thing needs some TLC.

it's got a built in 110V-220V convertor and an accordion input :shock:

Just wondering why, when my twin has been on for maybe a couple of hours, the power bulb starts to dim alot? The amp has just been fully serviced and re-tubed by a very reputable amp tech who says he can find no fault. It's no big deal, I dont need a light to tell me when this amp is on lol but just curious as to why it does it. Something to do with when the amp starts heating up I think, tried another build but still the same.

Hey all!

I am currently modding a friends Buddah Super drive 18 with a mod the factory supplied me with. My friend also asked for an indicator on his channel switcher....... I tried adding a simple LED but I found out the channel swicher uses 1/2 heater voltage to control the channel (=3.12V AC). Is there a simple way to add an indicator to this line???

I was so lucky to be able to pick up a small 15W WEM head. It sounded already good before, but changing most of the old caps for new high-end caps did away with some high end sizzle and gave me much mo' bass.

I found the schematic , will make notes about the actual values found in the amp when I can find back my notes.

Did pay much, came with a speakerless pick a bass cab, but I'm testing it now on two 80s stock Fender speakers in series (needs 16 ohm)

Here's the WEM history by the man...

Anyone have a schematic?

Hello, everybody!

I look for a schematic of Mojave Amp.
Do not you know it?

MoreCowbell was posting up a bunch of links to Yerasov pedals, so I started looking around at the rest of the sight and found their amp section. This one caught my eye - it has some clever tricks and it's worth checking out. I love the attenuated output jacks labeled, Day , Evening , Night .
Awesome.
Check it out!

Greetings people!

It's my first post aroud here, and it's embarrasing that it can't be a contribution in some way but I will greatly appreciate if someone could give me a hand with this;

I have a Marshall 50 watt 'plexi' (I think the right Model is 1987X) that has some serious hum and ghost notes. I changed the big filter can-caps, and the little electrolytic ones inside the amp; no improvement. I checked the tubes, they're balanced, there's no big difference between the two. I replaced every...

Hi!

Can somebody tell me approximate value of voltage gain of circuit above ( Ideally with some calculation-steps break-down :)). All caps are 47nF, Vcc around 300V.

Is it -5 (just wild guess :))?

Thanks!

Hi. Good new year to everyone.
Same informations (guts, schematics, photos) about this little interesting amp? Any reply is appreciated.
Thanks

i've been wanting to do the noisy cricket for some time now, and since i don't read schematics that well yet, i was glad to see the vero-layout for the noise cricket mkII

but has anyone done it on veroboard yet?

and ideas for a headphone-output would be IDEAL!!

Has anyone got the schematic of this preamp? I saw pics of guts some time ago and it was pretty simple inside... but can't find this pic anywhere

Here is something I found on the Valve Jr that is quite impresive.
I have seen other posts et.. that address the Epi jr. but none like this.

Enjoy

Hello,

I'm looking for information on Grid-Leak-Biasing .
I searched the web and found these links:

they're interesting and educating, but very theorertical aswell.
Has anyone a bit more practical information on the topic?
Is it really that unpredictable, or am I missing something?

I need to calculate the amplification-factor of a parallel grid-leak-biased 6N1P.
As the nominal amplification-factor of the 6N1P is stated with 33 i'm not even sure if it could be done with this tube,...

Added some soundclips to my new amp folder:

I'm going to add one more with my frankenstrat, later on.

All the clips are through an Emminence Red Fang 1x12.

Are you ready to get nuts....by looking at these guts ?:

Here is the accompaining text:

1969 Park (made by Marshall) Small Box, Aluminum face and back plate, Park 75, Factory Equipped with KT-88 Tubes!! If you have been looking for one.... then you know what it is, this amp is for you! These are Unbelievably rare and highly sought after, This Amp is one of the Rarest Parks in existence! I have had the privilege to own a few and I have to say this is the Best...

I bought a chassis from ebay really cheap to be my first tube project,
ebay link basically the power transformer is kicking out too high Voltages. the guy selling it said B+ needed dropped (using a 470R 10w after the rectifier diodes) I measured the voltage on mine and got 430v, so have left that for the minute...... the problem I have is the heater secondary is 8.5v and needs dropped I was told on PPwatt.com that two resistors of 0.33r or 0.47r would drop it down to an acceptable range , I...

Hi. Anyone have schematics of this amplifiers? I have Classic with wrong working Lead channel. So any info will be very helpful to tweak it right or mod for Ultra Lead specs.

I've had this finished for a few weeks but just got the chrome knobs.

Haha... I just realized I *still* need to replace that temporary plastic washer on the power switch with a metal one. Oh well...

Thanks to John Lyons for instructions on how to finish the wood. :D

I'm told that this is the Carmen Ghia but with a VOX front end. I had the darn schemo somewhere... :cry:

Found this by chance:

a little bit brutal but easy..... only problem is to get the tube.

analogguru

After some requests, here's a place to discuss about my subminiature tube amps.

Schematics and info can be found here:

And here are two pics:

subminiature tube amps