Cory's Phase Linear 2000 Ser II Restoration

[laatsch55]

I am getting 4 pieces from Cory, who lives in Montana. Another referral from Dave, Thanks Dave.,
The 2000 Ser II got unpacked first so it's first. Brown-Dog adapters with the Burr-rown op-amps, new caps, new TIS's and a THOROUGH CLEANING of pots and switches. Doing "before" testing now.

Some test results.

 

[laatsch55]

Quite a difference between "Ambience" settings.

 

[laatsch55]

Access to the guts.

 

[laatsch55]

Caps in. Replaced with Nichicon "Muse", Nichicon "KW", Panasonic "FM", "FC", and Elna RFS Silmic II's. The TIS 97's replaced with new Fairchild units, and the RC4136 op-amp with a Brown-Dog adapter with Burr-Brown 2134U's.

The closeups are of some classic "cold" solder joints.

 

[laatsch55]

Going back together with it. Pots soldered back in, sub panel on and faceplate on.

 

[laatsch55]

The "After" test, Frequency response-Aux inputs.

 

[laatsch55]

Thd & N--Aux input-Left channel

 

[laatsch55]

The rest of the measurements. All the afters are with the RC4739 op-amps left in. Joe is working on specing a replacement. It appears there is some improvemenmt. Listening to it now----

Source----Onix---CD-1
Pre-Amp--The aforementioned 2000 Ser II
Amp--- Chris's Mondo Spec 2

Sounds damn good. Playing with the "Ambience" control definately changes the sound.

 

[calman46]

Time to upgrade my Phase linear 2000 ser II . You used Brown Dog p/n 060601 adapter with 2 OPA2134 IC's correct ?. What did you use for the TIS917 ? The Fairchild site search didn't show a replacement .Thanks

 

[laatsch55]

I used TIS 97's. Had bought a bunch before they went obsolete. The Burr Browns did ok in place of the 4136's, but not on the 4739's. The 4739 is a very weird animal, don't mess with it.

 

[calman46]

I think I'll recapped it and play it stock for now. I noticed Brown dog gives you 3 options for the 4136's will the other 2 work also ?
I am missing the aluminum knob caps for the left Bass and Treble if anybody has some they would sell.

 

[laatsch55]

Never tried em. Always ran the 2--OPA 2134's...

 

[El Magnifico]

Guys: I'm interested to try some PL amps. If you find a good one at a good price, please let me know.

Thanks!

 

[laatsch55]

Do you want one to upgrade to the White Oak stuff or do you want an original restored??

 

[El Magnifico]

Do you want one to upgrade to the White Oak stuff or do you want an original restored??

Well, I'm not familiar with either one.

 

[laatsch55]

Plenty of info in the DIY section..

 

[calman46]

I started the upgrade on my 2000 Series Two . I'm following the thread but have a question on the 2.2 caps back to back on the outputs . Would a good film cap here be better ? The two 2.2uf 50v caps back to back are like one 1.5uf NP cap correct ? I'm also going to add some Dynamat to the frame for weight if for nothing else .I have all the nobs but two are missing the metal covers . I maybe look for heavier knobs too.

 

[laatsch55]

Try "Handmade Electronics " for the knobs, they had one that was a killer 700B replacement. Are you talking the 2.2 in series or parallel??

 

[calman46]

Its the 2.2 uf caps connected + to + number c47/ c49 , c48/c50 .

 

[laatsch55]

A 1.5 poly would be doable..BUT!!!!, as an output coupling cap/filter I don't know if it will handle the signal the same. I think a polarized cap is called for here.