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Carverfest Amp Tube Supernova

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tinpan

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TFM-45

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Location: Spotsylvania, VA

Post Tue Jan 31, 2012 4:33 pm

Re: Carverfest Amp Tube Supernova

It was part of a matched quad....doh!


Martin, I'd get my money back for those tubes, they clearly weren't matched very well since you didn't light all of them up at the same time ](*,)

Seriously, it could be a problem in your amp or more realistically cheap tubes. I'm betting the latter. I'll probably spend a month with mine, if they last that long, before I try swapping them out.

One of these days I am going to get into some serious tube swapping, just not yet.
Tinpan

HT - Sunfire TG IV, Sunfire Cinema Grand Sig. 400 x 5, Oppo 93, Klipsch LaScala (3), Cornwalls (2), SW-12, Sony 60" LCD

2 channel - AN L2 Pre-amp, AN Interstage Mono Blocks 300b PSE, AN 2.1 DAC, DUAL CS 5000 TT, Oppo DV-981HD, Lowther PM4a/Azurahorn/SentryIV

2 channel - AN L3 Signature Line stage, AN Interstage Mono Blocks 300b PSE, AN Sig. DAC 3.1 , AN Sig. Phono Stage, Sota Comet TT, Altec A5's

2 channel - Carver VTA20 Baby Black Beauty, Custom Line Stage, Klipschorns

2 channel - AN Interstage Mono Blocks 300b PSE, Carver C-5 Pre, Altec A4 speakers


2 channel - Audio Note Kit 1 300b SET, Audio Note DAC 2.1, Altec 288 Horns/JBL Bass bin
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TNRabbit

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(pair of) SILVER-7 TUBE AMPs

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Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Tue Jan 31, 2012 6:42 pm

Re: Carverfest Amp Tube Supernova

I had one blow last week in the same far right position. That's where the DC Restorer circuit is located...coincidence?

Maybe only coincidence. Has anyone else blown a tube in that position?
TNRabbit
Image

From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.
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mbskeam

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SILVER-7t

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Location: Woodinville Wa

Post Tue Jan 31, 2012 7:05 pm

Re: Carverfest Amp Tube Supernova

Maybe only coincidence. Has anyone else blown a tube in that position?



:-$ :-$ :-$ :lol: :lol: :lol: :lol: :lol:
Mbskeam


#1 BLACK BEAUTY's made by the man, the myth, the legend Bob Carver
CARVER: TFM-75, TFM-45(3), SD/A-490T
SUNFIRE: Tube pre
2 sets of ALS'3, set of SILVERS, set of PLATS
AUDIOCONTROL: phase coupled activator
KENWOOD: BASIC M2a (2)

“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
― Aristophanes

The only thing I'll feel......will be the RECOIL
Necronomicon Ex-Mortis....... Klaatu Barada Nikkto
"We should seek the greatest value of our action"
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TNRabbit

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(pair of) SILVER-7 TUBE AMPs

Posts: 13379

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Tue Jan 31, 2012 7:07 pm

Re: Carverfest Amp Tube Supernova

119.8 volts on the input gives me 358 volts DC at the tube circuit. I think I had the MM set to AC the other day when I got 470~

It's a shitty little Craftsman MM....
TNRabbit
Image

From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.
<<

Martin1970

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Location: Savannah, GA

Post Tue Jan 31, 2012 7:17 pm

Re: Carverfest Amp Tube Supernova

After a reflow and reseating the tube sockets, it seems to be working fine (for now).
ok2.jpg
ok2.jpg (144.4 KiB) Viewed 146 times


I'm tempted to buy better sockets and get rid of these.
The tube that went off is running 40 degrees cooler than the other three.
Not sure if that's relevant.

Gary: 120AC vs 440VDC B+
Carver: ALS plat upgrades, TX-11a, C-9, C-1
Sunfire: Cinema Grand Sig 400 Seven x2
Rane: RPM88 26Z x3
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elgrau

SILVER-7 TUBE AMP

Posts: 2899

Joined: Wed May 31, 2006 9:33 pm

Post Tue Jan 31, 2012 7:19 pm

Re: Carverfest Amp Tube Supernova

"Has anyone else blown a tube in that position?'

That's what she said!


Sorry; but this problem seems to need a LOT of comic relief...... :(
Family room: 400 disk changer with PS Audio Digital Link III DAC; Technics SL-1100A TT. QED Quenx1 IC's from DAC & TT to Adcom GTP-602 preamp/Tuner. AudioQuest King Cobra IC's from preamp to M1.0t mk-II opt2. QED Silver Spirals 4M wires to EPI 1000’s.
Living room: AudioQuest Black Mamba 8M IC's from family room preamp to Barcus-Berry 2002R Sonic Maximizer to GlowPower Zyxt IC's to Sunfire 300x2 to Nordost 6M bi-source wires to AOS 28" MDF spherical speakers using six 8" woofers and eight 1" dome tweeters symm. arranged around the surface.
SS system: CX-995V DVD to AV-705x 5 channel amp (center/rears) & M1.0t mk-II opt2(fronts).
Garage: TLM-3600 CDP to MXR150 Receiver (pre) to TFM-42 to EPI 400 speakers.
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TNRabbit

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(pair of) SILVER-7 TUBE AMPs

Posts: 13379

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Tue Jan 31, 2012 7:56 pm

Re: Carverfest Amp Tube Supernova

Martin1970 wrote:
Gary: 120AC vs 440VDC B+


Then how come I have 358 volts on mine?
TNRabbit
Image

From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.
<<

Martin1970

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TFM-25

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Joined: Sat Mar 06, 2010 5:44 pm

Location: Savannah, GA

Post Tue Jan 31, 2012 8:05 pm

Re: Carverfest Amp Tube Supernova

I measured it with the tubes in.
Playing music on the DQ-8s, moderate level.

I think Mike got 20V less than me FWIW.

Did you measure tubes out?
Or at a different point?
Carver: ALS plat upgrades, TX-11a, C-9, C-1
Sunfire: Cinema Grand Sig 400 Seven x2
Rane: RPM88 26Z x3
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angelod307

SILVER-7 TUBE AMP

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Joined: Sat Jun 06, 2009 10:56 pm

Location: manning, sc

Post Tue Jan 31, 2012 8:21 pm

Re: Carverfest Amp Tube Supernova

So I will ask bob in Florida next month for maybe a new / update design using a transformer that is more to the tubes 300 plus volts that they are designEd for. How much of a change could that be in the parts list?
CarverFest: I just go for the arts and crafts
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TNRabbit

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(pair of) SILVER-7 TUBE AMPs

Posts: 13379

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Tue Jan 31, 2012 8:24 pm

Re: Carverfest Amp Tube Supernova

Martin1970 wrote:I measured it with the tubes in.
Playing music on the DQ-8s, moderate level.

I think Mike got 20V less than me FWIW.

Did you measure tubes out?
Or at a different point?


Tubes in playing music. 458 at the big cap, 348 at the orange wire point on the tube pin.
TNRabbit
Image

From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.
<<

Martin1970

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TFM-25

Posts: 361

Joined: Sat Mar 06, 2010 5:44 pm

Location: Savannah, GA

Post Tue Jan 31, 2012 8:46 pm

Re: Carverfest Amp Tube Supernova

118ac
425dc cap
353dc pin 9
411dc pin 7
13 pin 3
6.1 ac heaters

Hooked to amazing ribbons playing moderate level stereo 20WPC mode.
Carver: ALS plat upgrades, TX-11a, C-9, C-1
Sunfire: Cinema Grand Sig 400 Seven x2
Rane: RPM88 26Z x3
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Chauss

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(pair of) SILVER-7t's

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Location: In my own little world.....

Post Tue Jan 31, 2012 9:02 pm

Re: Carverfest Amp Tube Supernova

Mullard NOS and new versions are the ONLY 6BQ5's I know of that will handle 550v.....
Martin- if you check that tube on a tube tester- I bet it is still good- it was an over voltage condition that caused it to glow.

Cheers!~
Image
Good sound—like good music, good wine and good fellowship—is meant to be shared.
"The difference between genius and stupidity is that genius has its limits" Albert Einstein
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Martin1970

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TFM-25

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Location: Savannah, GA

Post Tue Jan 31, 2012 10:06 pm

Re: Carverfest Amp Tube Supernova

holycrap.JPG
holycrap.JPG (46.25 KiB) Viewed 123 times
Carver: ALS plat upgrades, TX-11a, C-9, C-1
Sunfire: Cinema Grand Sig 400 Seven x2
Rane: RPM88 26Z x3
<<

mbskeam

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SILVER-7t

Posts: 1991

Joined: Mon Jan 25, 2010 2:32 am

Location: Woodinville Wa

Post Tue Jan 31, 2012 10:35 pm

Re: Carverfest Amp Tube Supernova

voltages on mine.

line 117v ac
B+= 410v

output tube
pin7= 407v
pin 9/orange= 355v
pin 2 both in spec

input tube
pin 6= 262v
pin 7 83v
pin 8 85v
pin 3 .349v

bias 13.25


both amps check about the same.
the B+ and a the 3.9K drop resistor check out at the same voltages
Mbskeam


#1 BLACK BEAUTY's made by the man, the myth, the legend Bob Carver
CARVER: TFM-75, TFM-45(3), SD/A-490T
SUNFIRE: Tube pre
2 sets of ALS'3, set of SILVERS, set of PLATS
AUDIOCONTROL: phase coupled activator
KENWOOD: BASIC M2a (2)

“Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.”
― Aristophanes

The only thing I'll feel......will be the RECOIL
Necronomicon Ex-Mortis....... Klaatu Barada Nikkto
"We should seek the greatest value of our action"
<<

frenchguy

SILVER-7t

Posts: 1744

Joined: Fri May 14, 2010 11:53 pm

Location: wisconsin,home of the Green Bay Packers!

Post Wed Feb 01, 2012 12:53 am

Re: Carverfest Amp Tube Supernova

martin & gary, I blew that same tube before leaving carverfest & just shut it down & unhooked everything & packed it up! when I got home found out my ct-23 was dead!! victim of that tube!! so there was no way I was gonna fire it up till I got new tubes!! mark suggested that I try some TAD tubes!! they are working & sounding great but only have about 20 hours on them so will give them some time to settle in. I also bought some cryoed mullards that I have yet to try!! I would never run that amp until you get new ones!! just my 02!! :)
Carver M-4.0t & Rollandized tfm42, ct-6 & ct-17, sda390t, jolida jd 100A & JBL L96,s Modified JBL 4401,s W/Ribbon Tweeters, Carverfest vacuum tube amp & CF Linestage, Dared SL-2000A tube preamp, Carver AL3 Amazing speakers in natural oak, Carver Cinema 5.1 subwoofer & Douglas connection cables
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