Redd .47 clone build.

Hi,
I've been lurking here for a while. Going to be building one of these preamps eventually, and would like to do it close to the original as possible. I'm pretty good at fabricating metal chassis for my projects, and have built a couple tube guitar amps. This thing looks ridiculously simple in comparison to their circuits.

I have a few internal photos of the .47. If anyone here has access to one, could you please post some good close-ups and maybe a few measurements?

Thanks!

Redd 47

What are you afraid of?

The answer to your question in the language of your choice:

1|\| 7|-|1$ Ph0rU/\/\ 4L0|\|3 \/\/3 |-|4\/3 $3\/3r4L r3DD47 pr0j3(7$, 0Ph \/\/|-|1(|-| 7|-|3 34$13$7 $74r71|\|9 p01|\|7 \/\/0ULD b3 QU4\/470|\|3'$ \/\/3LL d0(U/\/\3|\|73D 0r4|\|93 86.

Oh and,

welcome to the forum

You're right, I'm not doing anything EMI should give a shit about. what was I thinking...

I understand that there are a few PCB builds for this but I enjoy doing stuff point-to-point, and trying to copy vintage gear looks-wise as well as performance. It's just a huge part of the fun of it, for me.

Here are the few pics I have, since they don't come up on google anymore.

The fine gain knob is funny. A standard chicken head knob with beak and comb amputated.

Kingston said:

Redd 47

Click to expand...

you again!!  ;D ;D

we're just scared that, by our action, the forum could have some trouble!!!
we just care! 

I am fairly certain that no-one can object to showing a picture of a pre-amp?!?

audiox said:

The fine gain knob is funny. A standard chicken head knob with beak and comb amputated.

Click to expand...

Yea, I noticed that weird little bugger as well. There is also has some straight knurling around the perimeter. If I can't find something close enough, I'll have to cast it.

I have the component layouts from Rich Gorbutt/synthpunk. From what I can make out in these pics, they're dead on.

ed rees said:

audiox said:

The fine gain knob is funny. A standard chicken head knob with beak and comb amputated.

Click to expand...

Yea, I noticed that weird little bugger as well. There is also has some straight knurling around the perimeter. If I can't find something close enough, I'll have to cast it.

Click to expand...

That looks to me like a cap that screws onto the pot's mounting bush thread to cover a screw-slot pot shaft beneath it. I could be wrong, though.

MagnetoSound said:

ed rees said:

audiox said:

The fine gain knob is funny. A standard chicken head knob with beak and comb amputated.

Click to expand...

Yea, I noticed that weird little bugger as well. There is also has some straight knurling around the perimeter. If I can't find something close enough, I'll have to cast it.

Click to expand...

That looks to me like a cap that screws onto the pot's mounting bush thread to cover a screw-slot pot shaft beneath it. I could be wrong, though.

Click to expand...

+1

Thanks guys, that makes a lot of sense. Might make it easier to source as well, since it isn't truly a knob.

Hi fellas,
Got some measurements and spent an hour or so on my build today. I'm thinking 4 of these mounted in a 4u rack unit. Power supply on the left. In/out XLRs, pol. reverse, etc... below the preamps.

The 1/4" jack at the bottom is modified to be a bushing for the thumscrew cassette lock. I wouldn't be too surprised if that's how the real ones were made as well.

That Hammerite paint is instant vintage-y goodness in a can! Gonna look real tough once I make up the screen print for it.  ;D

Kingston said:

Redd 47

What are you afraid of?

The answer to your question in the language of your choice:

1|\| 7|-|1$ Ph0rU/\/\ 4L0|\|3 \/\/3 |-|4\/3 $3\/3r4L r3DD47 pr0j3(7$, 0Ph \/\/|-|1(|-| 7|-|3 34$13$7 $74r71|\|9 p01|\|7 \/\/0ULD b3 QU4\/470|\|3'$ \/\/3LL d0(U/\/\3|\|73D 0r4|\|93 86.

Oh and,

welcome to the forum

Click to expand...

next it will be manley and all hell will break loose ;D

I believe most of the manley designs
are not original

ed rees said:

Gonna look real tough once I make up the screen print for it.  ;D

Click to expand...

What, you're not going to engrave the lettering (like the originals)? 

I noticed that they were engraved. But couldn't think of an easy way to fill the engraving, over top of the hammered finish.

Might give it a shot though, don't know if my cnc router is that precise! I need to build a smaller one next time for stuff like this..

ed rees said:

I noticed that they were engraved. But couldn't think of an easy way to fill the engraving, over top of the hammered finish.

Click to expand...

It's easy enough to brush in black in the engravings and wipe off the excess.

But the one problem is the modern Hammerite is too thick compared with the vintage stuff. The new Hammerite will fill up the engravings.

Can you thin down the Hammerite? Or are you using the rattle spray can version?

Kingston said:

1|\| 7|-|1$ Ph0rU/\/\ 4L0|\|3 \/\/3 |-|4\/3 $3\/3r4L r3DD47 pr0j3(7$, 0Ph \/\/|-|1(|-| 7|-|3 34$13$7 $74r71|\|9 p01|\|7 \/\/0ULD b3 QU4\/470|\|3'$ \/\/3LL d0(U/\/\3|\|73D 0r4|\|93 86.

Click to expand...

Funny, when I saw that last week it was just hieroglyphics - I couldn't read it. Today it was really easy. Very strange.
???

...in this forum alone we have several redd47 projects of which the easiest starting point would be quavatone's well documented orange 86...

OMG. It 'does' say that.. lol
Neato.

Yeah, those are knob caps, designed to keep nosy fingers off the controls but of course, they never worked that way unless you glued the puppies on and then they had to be smashed off to get at the control.

Hey guys,

Trying to revive this topic. Any progress on the 47's?