tube equalizer

[massivpassiv]

hi all,

does somebody know a good resource for tube equalizer info?
can be aktive or passive, LC or RC filters. got the pultec passiv equalizer,
but would like to get more into tube equalizing.

thanx, massivpassiv

 

[Won]

for all things tube-related, a great resource is the webzine, http://www.tubecad.com

I believe their current (maybe the previous) issue had tube-based active xovers.

Cheers, Won

 

[Won]

Whoops, I just re-read your post and realized you were looking for equalizers, not crossovers... tubecad is still probably your best bet though...

-Won

 

[Thatch_Ear]

Go active cross and forget the EQ. If the recording aint good enough, listen to something else. My opinion.

 

[massivpassiv]

Go active cross and forget the EQ. If the recording aint good enough, listen to something else. My opinion.

there was a little missunderstanding: I need it for recording/ studio purposes (tracking, mixing, processing vocals etc....).
because good (vintage) recording tube gear is hard to find or very expensive
(I saw a pultec EQP-1 tube equalizer selling for us$ 2900 lately on ebay) I intend to start some diy projects. I did a lot of audio circuit design based on opamps, but I appreciate the lovely sound of tubes (I guess you too, otherwise you would never read this 🙂)
I visited a lot of tube/tubeamp sites the last days, and I learned a lot about tube circuits...so thanx to all hosting those informative sites, posting links and information on this forum! ...couldn´t get my hands on some good parametric equalizer schemos yet(except the pultec) , but if someone has a good differetial amplifier schematic (so I can built my own LC networks around) this would help me a lot to get started.

thanx for the replies,
massive

 

[Thatch_Ear]

Your getting way out of my league pal! I hope you get what you want so great music still can be recorded in a great format. I know someone that might be able to help you if you want check out his site and drop him a line. He has a lot of pro gear for studios but not what you are looking for, but he does have 30 years of tube audio connections. Luck to you.
<http://home.att.net/~chimeraone/index.html>

 

[Thatch_Ear]

Forgot, there is another guy close by that has the great old tube recorders. He has been fixing and selling them for 50 years I bet. The guy at Chimera introduced us so he can tell about him too if you ask him.

 

[mig27]

me too...

hi massivpassiv,

we maybe should get in contact since me too, I'd like to bild a nice passive tube EQ and live in Germany. Might be useful to join forces when it gets to finding rare parts.

I'll probably start with the project described on http://www.gyraf.se (you probably already heard of it...=

just send me a mail: mig27@snafu.de

best regards,


michael

 

[Brett]

<b>massivpassiv sez

</b>

does somebody know a good resource for tube equalizer info?

Some good pointers here.

http://www.tubecad.com/articles_2002/Missing_Sonic_Controls/Sonic_Controls.pdf

<b>Thatch ear sez</b>

If the recording aint good enough, listen to something else.

Sorry but there are soooooo many badly recorded, but musically exceptional pieces out there, that the opportunity to 'modify' something that otherwise sounds pretty mediocre to increase ones enjoyment of it seems fairly sensible to me, whereas missing out on it doesn't. There are ways to do it that don't change to signal for the good recordings. John Broskies article that I've linked above was heretical (to most 'philes) and I found it funny and eminently sensible. BTW, have you wired out the tone controls on your 400?

 

[rickcr42]

http://w3.one.net/~robgrow/circuits/pulteceq.html

 

[J Epstein]

Dig through the studio gear section of the archives at triode electronics' website:

http://www.triodeel.com/studio.htm

 

[Thatch_Ear]

The 400 has been replaced and the 300B has only a volume pot. I have to have really balanced tubes because the pot controls both channels.

 

[Thatch_Ear]

Found a site with used studio gear at <www.odysseyprosound.com> Luck!