2018 Carverfest Tube Power Amplifier Build

12th Annual CARVERFEST 2018 September 5th - 19th
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UncleMeat
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by UncleMeat » Sat Oct 06, 2018 9:06 pm

Dnspy007 wrote:
Tue Sep 25, 2018 8:23 am
MONO BLOCKING THESE AMPS.......?????



Bob came by the Treehouse Tuesday to hear my amps Mono, Found out they won't play in mono together..Played fine mono, one hooked up and turned on at a time, right or left , Hooked up and turned on together you get a growing hum in one channel. Bob thought maybe a bad cable so we changed cables, Also disconnected the Dreadnaught from the polks, changed Preamps C-11 BILLD to C-11 stock.....no luck. Bob said he'd have to study on it when he gets back to Seattle... Then post a fix.

Doug


The way I had them setup..... per Bob's instruction...

20180924_220354.jpeg
On the inside of the amp, try lifting the Zorbel Network capacitor (C14, or C28) from one channel. Test it as a single channel amp on one non-SDA speaker.

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UncleMeat
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by UncleMeat » Sun Oct 07, 2018 11:47 pm

Sorry, I forgot you may not have a schematic to find that cap, Doug. The capacitors I'm speaking of are the caps on the output terminals. Try lifting one of them from the output terminal so it is not bridging the +/- of one output channel.

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Dnspy007
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by Dnspy007 » Thu Oct 11, 2018 1:54 pm

Hey guys, No more Problems with hooking my Amps up mono... :D :D :D

Got both amps grounds fixed.... =D> Filter switch's work, Both Amps Church Mouse quiet with or without filter. \:D/ :D


Hooked them up Mono, First with my CF speakers...... \:D/ \:D/ They were ROCKIN' :D

Then The polks [-o<

Yes, they will play in mono with polks, With the Dreadnaught hooked up \:D/ \:D/ \:D/


20181008_235908.jpeg
Doug

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UncleMeat
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by UncleMeat » Thu Oct 11, 2018 4:56 pm

Congrats, Doug. Glad you got the problems sorted out and it's working with those SDA's as parallel-mono amps. Great news for others who want to use them with the Polks!

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Robert R
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by Robert R » Mon Oct 15, 2018 2:29 pm

Happy days - It seems that finally the two boards I lack (for those two amp kits I'm trying to deliver) are on the way. Now that the Rocky Mountain audio get-together is over, Jordon is back at work, and saying he will not only send them, but they will be finished/populated. Hope that includes the tube sockets, as well...

This delay may turn out to be not such a bad thing, as more and more is learned about how to put these together. Jordon's directions, that I fleshed out and rewrote under impossible time pressure, worked for the most part, but some more fleshing out and final polishing was needed, and that has now been done - by Greg and Jenny, with the help of many others - as thoroughly discussed on this and even more thoroughly on the CA forum. The few post-Fest ECO's are included, too. I hear that now there are even correct schematics and diagrams - imagine!

RR
"You know what folks? I'm happy."

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UncleMeat
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by UncleMeat » Mon Oct 15, 2018 3:19 pm

Thank You for all the work you did on the assembly instructions during CF, Robert!

The schematics for the 275 are uploaded to C! Wayne asked me to remove annotations of the grounding from the drawings. He wanted them to be simplified and so there won't be any conflict with the supplied build instructions. Good luck with your amp builds! To those who own CF amps, if you can't download the schematics from Carversite, just let me know I'll e-mail you a copy.

angelod307
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by angelod307 » Tue Oct 16, 2018 12:35 pm

Hello . I am not sure, but I could not logon the carver site. Am I still a member in there?
CarverFest: I just go for the arts and crafts

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sea
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by sea » Tue Oct 16, 2018 1:11 pm

8-[ 8-[ Still no Parts 8-[ 8-[

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BarryG
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by BarryG » Tue Oct 16, 2018 2:21 pm

sea wrote:
Tue Oct 16, 2018 1:11 pm
8-[ 8-[ Still no Parts 8-[ 8-[
Hey Ed, I am guessing the holdup is Jordan being out of town, my guess is they will be coming soon!

Barry
Carver C-11 (BillD modified by Dennis Miller), Carver SD/A-390t, Carver C-9, Carver M-1.0t MKII Opt. 2, Carver M-500t MKII (RichP’s final MKII before retirement), Carver TFM-45, TEAC DAC, Tube Buffer (MusicFidelity Clone), Sony Blu-Ray Player, Technics SL-7 turntable with Technics 310MC moving coil cartridge, Polk SDA1B’s (upgraded and modded by me), Carver ALS (Original upgraded), Interconnects by Doug, Speaker Wires by Doug, Salamander Archetype Equipment rack X2.

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sea
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by sea » Tue Oct 16, 2018 3:06 pm

BarryG wrote:
Tue Oct 16, 2018 2:21 pm
sea wrote:
Tue Oct 16, 2018 1:11 pm
8-[ 8-[ Still no Parts 8-[ 8-[
Hey Ed, I am guessing the holdup is Jordan being out of town, my guess is they will be coming soon!

Barry
Not sure, Barry. He said they were ordered more than two weeks ago.

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frenchguy
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by frenchguy » Tue Oct 16, 2018 3:21 pm

Maybe we should give him a tip? :rolleyes: ](*,) :(
2-Carver Crimson 275 vacuum tube amps,Carver C-1 tfm 42. ct-6 & ct-17, sda390t, jolida jd 100A. JBL L96 & JBL 4401,s W/Ribbon Tweeters, Carver Amazing Silver speakers in oak, Carver Cinema 5.1 subwoofer & Tesla audio Carverfest satellite ribbon speakers & stands & Douglas connection cables

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UncleMeat
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by UncleMeat » Tue Oct 16, 2018 3:25 pm

Sounds to me like they are being drop-shipped to you from overseas MFR. If so order processing/shipping could take a month (or more). #-o

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sea
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by sea » Sat Oct 20, 2018 7:19 am

Well on the parts front the news is not good........

The good news is Binding Posts arrived on Thursday. That is all the good news I have and it is really not that good.

The bad news......only 10 pairs were in the package. We need 70 pairs. No RCA’s have arrived.

I emailed Jordan. After no word on Thu I got an email late last night that he would look into it. It is disturbing to me that the two most readily and widely available items have been so problematic.

I am sorry. The only thing we can do is wait or buy them direct.

Ed

trav0810
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by trav0810 » Sat Oct 20, 2018 8:47 am

No worries here, Ed. I know you have absolutely no control over this at all. I certainly appreciate your effort!

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sea
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Re: 2018 Carverfest Tube Power Amplifier Build

Post by sea » Sat Oct 20, 2018 7:10 pm

sea wrote:
Sat Oct 20, 2018 7:19 am
Well on the parts front the news is not good........

The good news is Binding Posts arrived on Thursday. That is all the good news I have and it is really not that good.

The bad news......only 10 pairs were in the package. We need 70 pairs. No RCA’s have arrived.

I emailed Jordan. After no word on Thu I got an email late last night that he would look into it. It is disturbing to me that the two most readily and widely available items have been so problematic.

I am sorry. The only thing we can do is wait or buy them direct.

Ed
The rest of the binding posts came today.

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