FAQ  •  Register   •  Gallery •  Login

It is currently Wed Nov 26, 2014 8:42 pm

Help troubleshooting CF amps.....

<<

frenchguy

SILVER-7t

Posts: 1726

Joined: Fri May 14, 2010 11:53 pm

Location: wisconsin,home of the Green Bay Packers!

Post Thu Feb 23, 2012 1:04 am

Re: Help troubleshooting CF amps.....

I bought 2 in53529-tp. thats what bob originally suggested to use? they are 5w 15v. not right anymore?? did it change again?? someone please let me know!!!!! :? :?
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
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Thu Feb 23, 2012 1:12 am

Re: Help troubleshooting CF amps.....

frenchguy wrote:I bought 2 in53529-tp. thats what bob originally suggested to use? they are 5w 15v. not right anymore?? did it change again?? someone please let me know!!!!! :? :?


These are rectifier diodes for the incoming power, NOT the zeners for the DC Restorer Circuit. I was short 2, so decided to upgrade them all.
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.
<<

frenchguy

SILVER-7t

Posts: 1726

Joined: Fri May 14, 2010 11:53 pm

Location: wisconsin,home of the Green Bay Packers!

Post Thu Feb 23, 2012 1:25 am

Re: Help troubleshooting CF amps.....

ok thanks gary!! was thinking maybe I had to order something different, have not installed my zeners yet but amp works well so far!! I have some real nice new tubes in mine so they dont have a problem with it as is! thanks again!!
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
<<

angelod307

SILVER-7 TUBE AMP

Posts: 2728

Joined: Sat Jun 06, 2009 10:56 pm

Location: manning, sc

Post Thu Feb 23, 2012 2:23 am

Re: Help troubleshooting CF amps.....

i am just lazy to look, but i bought a hundred diodes a while back, and they are up for grabs to those in need. i forgot though for sure, but i believe they are for the dc restorer. a pm with the address they need to goto is all that is needed.
CarverFest: I just go for the arts and crafts
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Thu Feb 23, 2012 2:43 am

Re: Help troubleshooting CF amps.....

No difference touching a wire between the chassis.

No voltage AC or DC between the chassis, but I get a WEIRD continuity reading between the two chassis' that sounds gutteral instead of the usual steady tone.....?
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.
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Thu Feb 23, 2012 9:06 am

Re: Help troubleshooting CF amps.....

Here's more info--I get .28 VDC across the other end of the input between ground & positive/hot on one amp & .30 VDC on the other amp.

Video:

Image
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.
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Thu Feb 23, 2012 8:14 pm

Re: Help troubleshooting CF amps.....

Well, swapped the wires (polarity) & still have the same problem. I'm beginning to think I may have a bad transformer.....
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.
<<

tinpan

User avatar

TFM-45

Posts: 584

Joined: Tue Jan 05, 2010 7:48 am

Location: Spotsylvania, VA

Post Fri Feb 24, 2012 10:59 am

Re: Help troubleshooting CF amps.....

I don't think you have a bad transformer because the hum goes away when you unplug one amp. I wonder what happens if you can plug each amp into a different outlet?

Seems like a grounding issue.
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
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Fri Feb 24, 2012 12:50 pm

Re: Help troubleshooting CF amps.....

Robin, I agree it DOES sound like ground issue, but I've not been able to fix it thus far with typical ground fault applications

OK, here's where I'm at:

[quote=martin1970;87383]
I thought Gary swapped the power transformer already.

This is what Mike wants you to do:
OPT swap suggestion.jpg
OPT swap suggestion.jpg (44.22 KiB) Viewed 205 times


Swap the output transformer leads on one amp.
Yes, I know that looks like 5hi7.

[/quote]

OK: tried this swap & got VERY BAD SOUNDS immediately. Sounded like a bomb whistling/dropping, followed by a very destructive sounding bass buzz getting lower & lower. Unplugged everything immediately. BAD CHOICE--note to self--don't try that again!

Also swapped the incoming power wires with no effect.

Another observation: The constant buzz sounds out of phase on the speakers; if I swap speaker leads it's in phase. However, then the music is out of phase.
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.
<<

AlexSauter

User avatar

Site Admin

Posts: 609

Joined: Sun Apr 13, 2008 5:41 pm

Location: Fort Myers FL

Post Fri Feb 24, 2012 3:33 pm

Re: Help troubleshooting CF amps.....

TNRabbit wrote:Robin, I agree it DOES sound like ground issue, but I've not been able to fix it thus far with typical ground fault applications

OK, here's where I'm at:

[quote=martin1970;87383]
I thought Gary swapped the power transformer already.

This is what Mike wants you to do:
OPT swap suggestion.jpg


Swap the output transformer leads on one amp.
Yes, I know that looks like 5hi7.



OK: tried this swap & got VERY BAD SOUNDS immediately. Sounded like a bomb whistling/dropping, followed by a very destructive sounding bass buzz getting lower & lower. Unplugged everything immediately. BAD CHOICE--note to self--don't try that again!

Also swapped the incoming power wires with no effect.

Another observation: The constant buzz sounds out of phase on the speakers; if I swap speaker leads it's in phase. However, then the music is out of phase.[/quote]

Rabbit, if you keep getting these sounds, switch ONE channel's pin 7 wires if it is suppose to be a mono block. I had this same issue with Wayne's amps. I built them both and couldn't figure out why it was freaking out, then I realized I had mirrored the components but not the wiring.

Hope this helps,

Alex
RIP BillD
BillD wrote:Well, some people are glass half empty people and some are glass half full. Being an engineer, I just think the glass is the wrong size.


My system (sitting in the garage):

(Stereo System)
Modified Carver AL III+'s (Pushed into the corners to make room for the ALS speakers)
Modified CarverFest 2011 20w tube amplifier
Carver Pro PT-1800
Sunfire Prototype TGA-2375
Carver TX-2 Tuner (not used)
Logitech Squeezebox (replaced Tuner & dad's CD player)
CARVERaudio Directional RCA interconnects
RCA-Headphone jack for iPod & iPhone
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Fri Feb 24, 2012 3:46 pm

Re: Help troubleshooting CF amps.....

"Rabbit, if you keep getting these sounds, switch ONE channel's pin 7 wires if it is suppose to be a mono block. I had this same issue with Wayne's amps. I built them both and couldn't figure out why it was freaking out, then I realized I had mirrored the components but not the wiring.

Hope this helps,

Alex"

Alex,

Why did I not have to do this on the other pair of monoblocks I built?
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.
<<

AlexSauter

User avatar

Site Admin

Posts: 609

Joined: Sun Apr 13, 2008 5:41 pm

Location: Fort Myers FL

Post Sat Feb 25, 2012 2:26 pm

Re: Help troubleshooting CF amps.....

TNRabbit wrote:"Rabbit, if you keep getting these sounds, switch ONE channel's pin 7 wires if it is suppose to be a mono block. I had this same issue with Wayne's amps. I built them both and couldn't figure out why it was freaking out, then I realized I had mirrored the components but not the wiring.

Hope this helps,

Alex"

Alex,

Why did I not have to do this on the other pair of monoblocks I built?



No idea, just throwing out one more option that could be ruled out. :D
RIP BillD
BillD wrote:Well, some people are glass half empty people and some are glass half full. Being an engineer, I just think the glass is the wrong size.


My system (sitting in the garage):

(Stereo System)
Modified Carver AL III+'s (Pushed into the corners to make room for the ALS speakers)
Modified CarverFest 2011 20w tube amplifier
Carver Pro PT-1800
Sunfire Prototype TGA-2375
Carver TX-2 Tuner (not used)
Logitech Squeezebox (replaced Tuner & dad's CD player)
CARVERaudio Directional RCA interconnects
RCA-Headphone jack for iPod & iPhone
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Thu Mar 01, 2012 10:00 am

Re: Help troubleshooting CF amps.....

Crap. Amp #3 now blows the mains fuse every time I apply power to it.

Buzz is still there on #4 when they're both plugged in. No closer than I was before, but now I have a DOA amp.
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.
<<

mbskeam

User avatar

SILVER-7t

Posts: 1987

Joined: Mon Jan 25, 2010 2:32 am

Location: Woodinville Wa

Post Thu Mar 01, 2012 3:57 pm

Re: Help troubleshooting CF amps.....

would a bad CAP do this????

maybe one of the 2 big caps is bad?

or one of the 600v 0.1uf caps

I think I read this some place, more likely to happen on the old stuff. but now that I read what your #3 amp is doing, it came to mind

you could also try the DIY site. there are some really good tube amp trouble shooting guys on there.

when the problem is found it will most likely be a #-o moment....
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"
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Thu Mar 01, 2012 5:15 pm

Re: Help troubleshooting CF amps.....

Thanks, Mike. I'm beyond my capability with these now. I sent Bob an email with link to this thread.....we'll see what happens.
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.
PreviousNext

Return to CarverFest 20w Tube Amp

Who is online

Users browsing this forum: No registered users and 2 guests

Powered by phpBB © 2011 phpBB Group.