Search found 187 matches

by jeffreybehr
Sat Oct 31, 2015 4:25 am
Forum: Amplifiers
Topic: ET250S hybrid poweramp
Replies: 17
Views: 1557

Re: ET250S hybrid poweramp

bgiliberti wrote:you should have bought the MF-2550 - it's a CJ reworked McCormack DNA 250, with the same distributed architecture, but much better components, and reworked circuit topology.
Really? How is it that you KNOW that, that you state it as if it's FACT?
by jeffreybehr
Fri Oct 30, 2015 8:56 pm
Forum: DIY, mods, tweaks
Topic: Amppad for ET250S
Replies: 17
Views: 1859

Amppad for ET250S

My woodworker-friend got all those sticks cut and glued and I took the 4 resulting slabs to Woodworkers Source to be surface sanded. One has a bit of 'potato-chip' dish and it'll be only about 1/2" (12 - 13mm) thick when finished. All these now are 13/16" (21mm) thick and after sanding flat, the ot...
by jeffreybehr
Thu Oct 29, 2015 8:07 pm
Forum: Amplifiers
Topic: ET250S hybrid poweramp
Replies: 17
Views: 1557

Decided today that the amppad using 3 layers...

...totaling 2-1/4 inches just wasn't thick enough, so I just returned from buying another stick of goncalo alves for a 4th layer. The pad's weight will be, I estimate, c. 40 pounds. No wonder my wife has called me Mr. Excess. ;) :? FWIW, I've also decided to try to 'improve' this amp just a little,...
by jeffreybehr
Thu Oct 29, 2015 4:47 am
Forum: Amplifiers
Topic: ET250S hybrid poweramp
Replies: 17
Views: 1557

After 6 days = c. 140 hours, the amp sounds...

...much better than I thought it would at this point, and it'll only get better sounding! :D 'Getting better sounding' will be assisted by better speaker cable to both channels--now I'm using about seven feet of old 20g. zipcord wound around the spades to extend the left-channel cable to the amp on...
by jeffreybehr
Sat Oct 24, 2015 10:05 pm
Forum: Amplifiers
Topic: ET250S hybrid poweramp
Replies: 17
Views: 1557

Re: ET250S hybrid poweramp

bgiliberti wrote:What do you mean "there's no bottom on the amp"?
Read the 4th post; I removed the bottom cover to get at the input cables; the bottom cover is still off.
by jeffreybehr
Sat Oct 24, 2015 5:14 pm
Forum: Amplifiers
Topic: ET250S hybrid poweramp
Replies: 17
Views: 1557

Re: ET250S hybrid poweramp

Day 3 and it still runs! Found a slightly larger pad and am now footing it with 4 Herbies Tall Tenderfeet at the edges because there's no bottom on the amp. http://i89.photobucket.com/albums/k220/jeffreybehr/C-j%20equipment/conrad-johnson%20ET250S%20poweramp/2015Oct24_on%20new%20pad_2000w_zpsowwaec...
by jeffreybehr
Fri Oct 23, 2015 2:31 am
Forum: Amplifiers
Topic: ET250S hybrid poweramp
Replies: 17
Views: 1557

Received it today the 22nd

Spearit packed the LARGE c-j carton into another; the whole thing arrived in perfect condition. After unpacking, I pulled the top and bottom covers to insure there were no loose parts inside and also to fotograf it. There are lots of pics at http://s89.photobucket.com/user/jeffreybehr/library/C-j%2...
by jeffreybehr
Sat Oct 17, 2015 5:03 pm
Forum: Non-CJ Products-Audio
Topic: Quad ESL-2912 ...
Replies: 17
Views: 4390

Re: Quad ESL-2912 ...

RJ, apparently I've confused you. The 'next evolution of my system' is intended to be the combo of the c-j ET250S and the Sanders 10ds. The beginning of that is adding the '250 to the Avanti III-based system. I've ordered the '250.
by jeffreybehr
Fri Oct 16, 2015 9:15 pm
Forum: Amplifiers
Topic: ET250S hybrid poweramp
Replies: 17
Views: 1557

ET250S hybrid poweramp

Ordered one Wednesday from Spearit--$4950 delivered for a new one. (Refurbs are $4250.) I had asked about the 7-days-for-cash-refund return privilege v. an amp that requires maybe 500 hours to break-in; the GM answered that he'll extend the return-for-cash-refund privilege to 30 days for the '250. ...
by jeffreybehr
Wed Oct 14, 2015 3:17 pm
Forum: Non-CJ Products-Audio
Topic: Quad ESL-2912 ...
Replies: 17
Views: 4390

Re: Quad ESL-2912 ...

Gentlemen, the '989s didn't have too much treble energy with only the '11s, they were too bright with all amps I tried, which is why I sold them. RJ, thx for your observations on the 10ds v. 2912s. I've decided to start this next evolution of my system with a new c-j ET250S from Spearit. We'll see ...
by jeffreybehr
Sat Oct 10, 2015 8:14 pm
Forum: Non-CJ Products-Audio
Topic: Quad ESL-2912 ...
Replies: 17
Views: 4390

Re: Quad ESL-2912 ...

I too have owned, used, and loved Quads. I started with one pair and then stacked '57s; they sounded excellent with woofers, but I didn't have the money then to buy a high-Q, low-enough-power poweramp, so this lover of large-scale, Romantic-period Classical music eventually replaced them with somet...
by jeffreybehr
Mon Jul 06, 2015 8:52 pm
Forum: Troubleshooting/problems/manuals/schematics
Topic: any manual available for ET3 or classic 2 preamp
Replies: 2
Views: 1116

Re: any manual available for ET3 or classic 2 preamp

looking for pdf of Classic 2 preamp and ET3 preamp is schematic of ET3 same with PV15 but difference tube,ET3 with 6922 and PV15 with 6c4 ,any one know ? Arema, first, welcome to this forum. Second, I have no knowledge of the ET3. Third, I know that technically, the 6C4 and M8080/EC90/CV4058 are 't...
by jeffreybehr
Tue Jun 02, 2015 6:25 pm
Forum: Troubleshooting/problems/manuals/schematics
Topic: Preamplifier Premier 16Ls2 schematics wanted
Replies: 7
Views: 821

Re: Preamplifier Premier 16Ls2 schematics wanted

ghibli, schematics are on the way and I've asked c-j if the power transformer can be rewired for 230VAC. Now I have a request for you--could you shoot a couple good pics--well focused and at least, say, 3000 pixels wide--of the interior of the preamp, one from the front and one from the rear ? If y...
by jeffreybehr
Tue Mar 17, 2015 6:12 pm
Forum: General Discussion - CJ related topics
Topic: Capacitors---- HELP !!!
Replies: 6
Views: 1062

Re: Capacitors---- HELP !!!

Infinity1 wrote:Tried them, after several emails, they said they couldn't help me.


HUH?????????????? They would not or could not sell you capacitors?

Or are you looking for advice on which caps to replace with what? If so, contact Jeffrey Glowacki of Sonic Craft. cs@soniccraft.com
by jeffreybehr
Wed Dec 24, 2014 12:24 am
Forum: Member Systems Gallery
Topic: Conrad-johnson, First Watt, and Serenity Acoustics
Replies: 4
Views: 3390

Re: Conrad-johnson, First Watt, and Serenity Acoustics

great speakers! I always loved B&G drivers and at some point I'll probably DIY speakers using bohlender graebener drivers. Neo3 implements nicely with ML electrostats. Jeffrey, you are always busy making great sounding gear perfect!!!! I agree about the B-G drivers; I installed Neo-3 PDRs in a pair...
by jeffreybehr
Tue Dec 23, 2014 8:20 pm
Forum: Member Systems Gallery
Topic: Conrad-johnson, First Watt, and Serenity Acoustics
Replies: 4
Views: 3390

Conrad-johnson, First Watt, and Serenity Acoustics

From this system... http://www.conradjohnsonowners.com/viewtopic.php?f=6&t=142 ...gone are the Vandersteen 5As and all-three McCormack poweramps. http://i89.photobucket.com/albums/k220/jeffreybehr/Room/2014Dec23_Roompano_SAM0164_1800w_zps4bbcb1be.jpg Speakers are Serenity Acoustics Super-7s (all-di...
by jeffreybehr
Sun Dec 07, 2014 8:15 pm
Forum: Troubleshooting/problems/manuals/schematics
Topic: CJ Premier 14
Replies: 3
Views: 715

Re: CJ Premier 14

...ahem...did you look on this site?

viewtopic.php?f=17&t=128
by jeffreybehr
Thu Nov 06, 2014 9:57 pm
Forum: Amplifiers
Topic: Classic-Sixty : Multiple blown fuses
Replies: 3
Views: 755

Re: Classic-Sixty : Multiple blown fuses

Is 'the fuse' a high-Voltage fuse under a largish--3/4"-diameter?--black cap perhaps on the top of the chassis or a regular-looking 120VAC fuse on the back of the amp?