DIY mic pre

  • Thread starter Thread starter royharper3220
  • Start date Start date
Everett? Yesssss.


Where can you get things like that?
Click to expand...

That is a secret. If I told someone would come along and buy everything before I can. I do have a killer source on vintage and not so vintage parts. If someone wants to I could get something for them when I get something for me. That way the prices may come down when getting more stuff at one time. I would not make anything of it too.
 
royharper3220 said:
so if I've never built a pre-amp will I be able to do the PAIA tube mic pre-amp? is Everything i need included? like instructions :)
Click to expand...
Yeah, it's all included. But you need to know how to solder without destroying the components, and where not to stick tools or your finger when power is applied, since tube curcuits are higher voltage. I think you'd do best to build at least one of those real simple projects I mentioned above before you try the tube preamp. One little mistake and the whole thing smokes.
 
I built a mono power amp a couple of years ago. The amp module was from a Jaycar Electronics kit consisting of the circuit board and all the components that solder onto it. I had to build the power supply which is also mounted in the case, and all the other things that you have to do. Here are some pics:

http://www.tabarchive.co.uk/asdf/amp1.jpg
http://www.tabarchive.co.uk/asdf/amp2.jpg
http://www.tabarchive.co.uk/asdf/amp3.jpg

Those photos were taken during the construction of the amp. Since then I have cut a hole in the back panel for the heatsink to poke through. The amp is rated as 175WRMS / 4Ohm, at around 0.01% THD. I would like to add another module so it's stereo and put it in a rackmount case, it would make a pretty fine reference amp, or even for PA for small apps.
 
After looking at this post... There are several kits that were mentioned that seem very interesting.

Does anyone have any comments on how these specific kits sound and what they compare to? MP-3 looks interesting but so do the other more expensive ones. Please respond if you have ones of these kits and enlighten us. If possible try to be specific in comparisons.
Thanks.
 
There was a cool looking progect in the Tape-op this month.
 
umair said:
...Does anyone have any comments on how these specific kits sound and what they compare to?...
Click to expand...
The Seventh Circle kits I mentioned earlier come in flavors similar to the old Neve pres (very “colored”) and the John Hardy / Jensen Twin Servo pres (every-so-slightly colored, mostly clean and pristine). I’ve heard the Scott Hampton FET pre described as very ‘Neve’ sounding, and it’s probably the simplest to build. Simple as it is, Scott labored over component selection to come up with the best sound. One guy at RO said he'd consider losing his Neve copy after hearing the Hampton pre.
 
Thanks Flatpicker...

I will put that on my GAS list. I just need to buy it when I know I have time to build it.... or I can cheat and bring it to work and -have it done by one of my electrical engineers... ha ha...
 
some of you may remember that about six months ago i was looking for a 8/16 channel channel front/back end for my studio.

after finding nothing in my price range that seemed to fit i decided to build one my self. i can solder and read diagrams pretty well. 12-2 all tube. its nearly finnished- i'll post pics and mp3s when its done.

it has 37 tubes in so far and i never realised how much it would cost. not only on tubes but transformers VUs capacitors and stuff. i'm using pultec esc filterbased EQ with 8 pots/ switchs per channel on eq alone.

but the point of this was i'm using a pre design similar to the GRAf audio one show above. it probally cost £30-£40 per channel, but thats wihout power supply or case. i've played loads of stuff through them and they sound great. if you look elsewhere on the GRAF site there is also the diagrams for a TUBETEC pre which is pretty similar.
 
Toby,
Sounds like a HUGH project! Looking forward to hearing about it when you're finished. :D

Doc,
Thanks for fixing that. I usally test links after I post them, but I must have forgot this time.
 
another mic pre schematic

in this months december issue of nuts and volts on page 25.
uses a low noise tlc2201 op amp. the advantage of this design is a simple 5 volt supply.hope someone finds it usefull out there. the way i would use this design is take the output into a compressor with an input volume control.
thus you dont need a pot on the preamp. maybe try just a touch of compression. should sound pretty good due to the low noise figure of the op amp.
just an idea to help someone out there. nice and cheap to build.
 
You must log in or register to reply here.
Back
Top