Carverfest Tube Amp Technical Discussion

12th Annual CARVERFEST 2018 September 5th - 19th
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UncleMeat
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Carverfest Tube Amp Technical Discussion

Post by UncleMeat » Mon Sep 03, 2018 9:18 pm

Please post your questions about the build and links to other information like mod threads, schematics, pictures etc here. Please re-post the information that is on other forums on carveraudio.com because that information may not be accessible by non-members of those forums.

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BarryG
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Re: Carverfest Tube Amp Technical Discussion

Post by BarryG » Wed Sep 05, 2018 10:35 am

RobertR posted this schematic on CS!
0416DB31-3AEE-479B-A3A7-E3FFBCEDA35A.jpeg
Power supply schematic for Crimson275
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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Shortcake
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Re: Carverfest Tube Amp Technical Discussion

Post by Shortcake » Wed Sep 05, 2018 12:14 pm

Was wondering if he was going to get around to sharing with us here. Thanks
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UncleMeat
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Re: Carverfest Tube Amp Technical Discussion

Post by UncleMeat » Wed Sep 05, 2018 1:28 pm

Shortcake wrote:
Wed Sep 05, 2018 12:14 pm
Was wondering if he was going to get around to sharing with us here. Thanks
I asked BG, LT, JG to re-post here if something was not on both sites; and vice-versa. Just in case it doesn't show up on CA or C! from the original post (can't login, forgot, etc.)

Thanks BG!

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BarryG
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Re: Carverfest Tube Amp Technical Discussion

Post by BarryG » Wed Sep 05, 2018 9:04 pm

More from RobertR:

I have schematics, but they have a few mistakes/changes, and Jordon doesn't want them posted until he gets them just right. We really don't need the confusion of different versions being copied to everybody.

BTW, there is one error in the PS schematic - the B- voltage should read 47 volts, not -41.

The amp boards are going to have to be populated by us, and they (boards and the parts for them) are on the way, shipped from Seattle last Friday, and going right to the Watershed office.. A single board for both channels, with seven tube sockets, 50-plus resistors, nearly 30 caps, and four diodes. It should be a fun weekend.
The remainder of the kit parts was shipped Tuesday, and may take a week.

RobertR
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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Magnaryder
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Re: Carverfest Tube Amp Technical Discussion

Post by Magnaryder » Thu Sep 06, 2018 10:32 pm

I had the opportunity to get close up and personal with the new amp. Very schweet. Bob offered to allow me to put it in my rig and give it a spin on the M3s. How cool is that. I’ll report back with impressions and how it integrates into my rig.

ray
Magnaryder

Its going to be used equipment when I sell it, so it may as well be used equipment when I buy it.

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Dennis47
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Re: Carverfest Tube Amp Technical Discussion

Post by Dennis47 » Fri Sep 07, 2018 7:19 am

Magnaryder wrote:
Thu Sep 06, 2018 10:32 pm
I had the opportunity to get close up and personal with the new amp. Very schweet. Bob offered to allow me to put it in my rig and give it a spin on the M3s. How cool is that. I’ll report back with impressions and how it integrates into my rig.

ray

Ray,
Very cool... 8)
Very interested in your opinion...will you be listening to only KT120s or will you
also try the KT88s and 6550s?

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Magnaryder
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Re: Carverfest Tube Amp Technical Discussion

Post by Magnaryder » Fri Sep 07, 2018 1:26 pm

We have the Crimson 275 in place of the mighty V20 in Cabin 12. Y’all gonna love this amp. Big stones, it’s driving the M3s beautifully. We’re going to roll some PSVane front end tubes in and my RCA 6L6s in and give them a go.
Magnaryder

Its going to be used equipment when I sell it, so it may as well be used equipment when I buy it.

"Racing is life, the rest of the time you're just sitting around."-Steve McQueen

trav0810
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Re: Carverfest Tube Amp Technical Discussion

Post by trav0810 » Fri Sep 07, 2018 1:45 pm

Magnaryder wrote:
Fri Sep 07, 2018 1:26 pm
We have the Crimson 275 in place of the mighty V20 in Cabin 12. Y’all gonna love this amp. Big stones, it’s driving the M3s beautifully. We’re going to roll some PSVane front end tubes in and my RCA 6L6s in and give them a go.
That's good to hear. I plan on using a pair of them on my CS2.7 And I was hoping it would be a good match with the open baffle

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Re: Carverfest Tube Amp Technical Discussion

Post by kve777 » Fri Sep 07, 2018 3:59 pm

I'm bringing literally hundreds of front end tubes for rolling.
Kevin

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Re: Carverfest Tube Amp Technical Discussion

Post by kve777 » Fri Sep 07, 2018 3:59 pm

Vintage stuff, RCA, GE, Sylvania, Telefunken, Amperex, Mullard...
Kevin

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UncleMeat
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Re: Carverfest Tube Amp Technical Discussion

Post by UncleMeat » Fri Sep 07, 2018 5:09 pm

8)
I've got different sets of power tubes to try also. I can't speak for the Carverfest amp but the power tubes in my modded Marshall responds well to power tube rolling.

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Magnaryder
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Re: Carverfest Tube Amp Technical Discussion

Post by Magnaryder » Fri Sep 07, 2018 10:01 pm

With any luck I can get the schematic and get my parts upgrades ordered and done while I’m here. Bob is anxious to get the process underway.

ray
Magnaryder

Its going to be used equipment when I sell it, so it may as well be used equipment when I buy it.

"Racing is life, the rest of the time you're just sitting around."-Steve McQueen

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mbskeam
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Re: Carverfest Tube Amp Technical Discussion

Post by mbskeam » Fri Sep 14, 2018 9:59 am

NOTE:

We ran out of white wire, so for the twisted input wires they are red and white(LEFT) and red and black(RIGHT)

please note this small change when wiring.
DSC_0121.JPG
Mbskeam

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Dennis47
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Re: Carverfest Tube Amp Technical Discussion

Post by Dennis47 » Sun Sep 16, 2018 3:43 pm

Magnaryder wrote:
Fri Sep 07, 2018 1:26 pm
We have the Crimson 275 in place of the mighty V20 in Cabin 12. Y’all gonna love this amp. Big stones, it’s driving the M3s beautifully. We’re going to roll some PSVane front end tubes in and my RCA 6L6s in and give them a go.
Ray,
Interested to know your opinion on preference for power and input tubes?
Has there been a consensus on which tubes (including mfgr.) sound best?

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