6 string + amp head build

**woodturner777** · 3rd February 2010, 08:11 PM

There you go Andrew, like me you have to watch what you post.
Cheers,Bob

**Andrew_B** · 3rd February 2010, 09:28 PM

while i remember, heres the spec of the amp....

aa764 champ
5w or so clean output
6v6gt power tube
5y4 valve rec
an overspecced power transformer

i want to have a jam on it before i send it back

**woodturner777** · 3rd February 2010, 09:44 PM

So you want to have jam on it so what are you going to do Andy, Eat it.?

i want to have a jam on it before i send it back

**Andrew_B** · 3rd February 2010, 11:19 PM

Originally Posted by woodturner777

So you want to have jam on it so what are you going to do Andy, Eat it.?

i want to have a jam on it before i send it back

NO...

i meant i want to crank it up and play through it!!!!!

**floody_85** · 4th February 2010, 05:05 PM

How many watts is it??
I always wanted to try building one of those things lol

**R3R** · 4th February 2010, 05:31 PM

Originally Posted by floody_85

How many watts is it??
I always wanted to try building one of those things lol

champs are usually around 5 watts

modding little amps would have to be one of the most fulfilling hobbies i can think off...btw

**Andrew_B** · 4th February 2010, 08:00 PM

Originally Posted by floody_85

How many watts is it??
I always wanted to try building one of those things lol

yea about 5watts

he will be building me a 50watt head soon

Originally Posted by R3R

champs are usually around 5 watts

modding little amps would have to be one of the most fulfilling hobbies i can think off...btw

i was amazed at how little wiring is inside the thing....
it looks SO simple....

**nicovington** · 4th February 2010, 11:04 PM

Hey there, thought I might sign up and share a few more details.

floody,
The amp is approximately 5watts, I think I might recall 4w clean output when I measured it, and a little bit more when square waving

In general, yes the actual build is very simple, but you are working with very high voltages. Off the top of my head, I think the power transformer used pushes out 600volts AC, CT, at 60ma or so. Way more than is required to stop your heart. There is also the problem of trouble-shooting. You will normally encounter one of more problems, and it can be very frustrating to diagnose and fix...

I'm currently working on a "Hi-Octane" amp, which is another little 5w beast, using an SE EL84 power stage. After that I will see about tackling Andrew's 50w JCM800 build.

Champ:

Hi-Octane:

Cheers,
Nic

**DavidG** · 5th February 2010, 12:30 AM

That bring back memories. Back in my early days in electronics, prior to transistors being popular, I made many a chassis.

The old 6v6 audio output was common in radios. used heaps.
Must be 30 or so years since I did that stuff.

**Andrew_B** · 5th February 2010, 02:08 AM

Originally Posted by nicovington

Hey there, thought I might sign up and share a few more details.

floody,
The amp is approximately 5watts, I think I might recall 4w clean output when I measured it, and a little bit more when square waving

In general, yes the actual build is very simple, but you are working with very high voltages. Off the top of my head, I think the power transformer used pushes out 600volts AC, CT, at 60ma or so. Way more than is required to stop your heart. There is also the problem of trouble-shooting. You will normally encounter one of more problems, and it can be very frustrating to diagnose and fix...

I'm currently working on a "Hi-Octane" amp, which is another little 5w beast, using an SE EL84 power stage. After that I will see about tackling Andrew's 50w JCM800 build.

Hi-Octane:

Cheers,
Nic

everyone welcome Nic

glad to see you joined up

hi octane looks neat

Originally Posted by DavidG

That bring back memories. Back in my early days in electronics, prior to transistors being popular, I made many a chassis.

The old 6v6 audio output was common in radios. used heaps.
Must be 30 or so years since I did that stuff.

PICS!

**R3R** · 5th February 2010, 09:48 AM

Originally Posted by nicovington

Hey there, thought I might sign up and share a few more details.

floody,
The amp is approximately 5watts, I think I might recall 4w clean output when I measured it, and a little bit more when square waving

In general, yes the actual build is very simple, but you are working with very high voltages. Off the top of my head, I think the power transformer used pushes out 600volts AC, CT, at 60ma or so. Way more than is required to stop your heart. There is also the problem of trouble-shooting. You will normally encounter one of more problems, and it can be very frustrating to diagnose and fix...

I'm currently working on a "Hi-Octane" amp, which is another little 5w beast, using an SE EL84 power stage. After that I will see about tackling Andrew's 50w JCM800 build.
Cheers,
Nic

aah saweet

i have a pair of HO's too

**Andrew_B** · 5th February 2010, 10:34 AM

is that a gretsch i see?

**R3R** · 5th February 2010, 10:37 AM

Originally Posted by Andrew_B

is that a gretsch i see?

it's a grets.ch

**Andrew_B** · 5th February 2010, 10:49 AM

pics!

**nicovington** · 5th February 2010, 12:54 PM

Originally Posted by R3R

aah saweet

i have a pair of HO's too

Did you build Hi-Octanes inside the valve junior chassis? I'm actually using a set of VJ transformers since I got them at a very nice price, the extra voltage will push that EL84 a little harder though

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