Finished Pultec EQP-1A clone with Cayocosta layout

[bram9206]

I just wanted to share some pictures of my Pultec EPQ-1A clone (well, actually I built two, a stereo-pair, but here's just one of them). The main idea was to stay as close as possible to the original Pultec, technically, as well as cosmetically, without exceeding the cost of €1000/each. Here are some side notes. Will be happy to answere any questions:

- layout by Cayocosta, RecProAudio (thanks Ron!)
- faceplate by Frank Röllen (thanks Frank!)
- original NOS RCA tubes
- chasis painted in Hammerslag (3U enclosure by Par-Metal)
- high-end carbon comp resistors
- high-end Sprague Atom filter caps
- TAD paper-in-oil coupling caps
- original un-faceted jewel pilot light from Duck's Deluxe (when it comes to details, you know...)
- original Dakaware knobs from Don-Audio
- original Triad HS56 input transformer
- interstage and output are Sowter
- Hammond CAX370 power transformer for European 230V

How they sound? Well, what can I say... they sound just fantastic! Probably the best EQ you can get at the moment  ;D
They are also very very quiet, no hum or noise or whatsoever. They sound just like NOS Pultecs from the fifties!
Here is one of the two I built:

 

[ruffrecords]

Beautiful!!

Cheers

Ian

 

[anjing]

A work of art! What is the wire you used for the input and output?

Pierre

 

[bram9206]

It's solid cloth wire from Tube Depot: http://www.tubedepot.com/cw-20-sld.html

But the 20 Ga. I used is way too thick, doesn't bend so easy so it's harder to make a neat wiring. Very solid though...
Nevertheless, if you ever make a clone yourself, I would suggest a thinner puch-back wire.

 

[emrr]

looks great. 

 

[bruno2000]

Outstanding!
Best,
Bruno2000

 

[drask]

Wow so pretty !
The front panel look beautiful in black 

 

[bram9206]

Btw, anyone building a Pultec clone right now, there are now two original NOS Chicago PSC-55 power transformers for sale on ebay!! Too bad I never had the chance to come across one of these when I was building my clones...

http://www.ebay.com/itm/Chicago-PSC55-Power-Transformer-for-Tube-CircuitsPultec-/141132658647
http://www.ebay.com/itm/Chicago-PSC-55-Power-Transformer-for-Tube-Circuits-Pultec-2-of-2-/141132658902?pt=Vintage_Electronics_R2&hash=item20dc2978d6

 

[drask]

Btw, anyone building a Pultec clone right now, there are now two original NOS Chicago PSC-55 power transformers for sale on ebay!! Too bad I never had the chance to come across one of these when I was building my clones...

http://www.ebay.com/itm/Chicago-PSC55-Power-Transformer-for-Tube-CircuitsPultec-/141132658647
http://www.ebay.com/itm/Chicago-PSC-55-Power-Transformer-for-Tube-Circuits-Pultec-2-of-2-/141132658902?pt=Vintage_Electronics_R2&hash=item20dc2978d6

Interesting ! I'll keep an eyes on

 

[Jidis]

The front panel look beautiful in black 

I was thinking the same thing. It makes so much more sense with the style of the thing. Should have always been that way.

Beautiful piece!

 

[ranalog]

Hi All,
Just thought you would like to know here are more of the Original Chicago Power transformers for the Pultecs, Chicago PSC-55 PCC-55 Power Transformer NOS Tube Audio Pultec, Check them out, they look all original!!

http://www.ebay.com/itm/Chicago-PSC-55-PCC-55-Power-Transformer-NOS-Tube-Audio-Pultec-EQP-1A-EQH2-1of2-/171205514148?pt=Vintage_Electronics_R2&hash=item27dca4d3a4#ht_4048wt_1219

http://www.ebay.com/itm/Chicago-PSC-55-PCC-55-Power-Transformer-NOS-Tube-Audio-Pultec-EQP-1A-EQH2-2of2-/171205516575?pt=Vintage_Electronics_R2&hash=item27dca4dd1f#ht_3039wt_1219

 

[radiance]

Awesome!

 

[flaheu]

whoa !!!!!

I'm freakin' jealous  8) 8) 8)

 

[berkleystudios]

that is simply amazing.



great work!  8)

 

[bram9206]

Someone asked me a question about the Pultec enclosure that I used for my project and I thought it'd be worth sharing the answere with everyone else:

Hi,
I'm looking after the same chassis for my new pultec that you choosed.
I know it come from par-metal but I'd like to know how much it cost with shipping and customs fee?
I'm in belgium and the last time I ordered in USA my package stayed a long time in customs and cost me a lot.

Or maybe there is a seller's in EU?
Wich model do you choose?

Thank's

-----------------------------------------------------------------------------------------------------------------------------------------------------------------

It's the Par Metal 14-19053G enclosure. I ordered it without any finish (so blank alluminium) and without a faceplate.
The enclosure was €57
Shipping from US to Belgium was €42
I don't remember about the taxes, but I guess it was not more than €30

Then, the black front panel I got from Frank Röllen, a German guy how does custom engraved front panels. You can just ask him for a Pultec frontpanel that suits a Par Metal enclosure and he'll know just what to do. He's a real pro! One Pultec front panel should be around €157 I think, not cheap, but totally worth the money if you want the original looks.

Let me know if you have any more questions. I also have a parts list that I made for this project.

My best

 

[bram9206]

Parts list in attachment!