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Help troubleshooting CF amps.....

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TNRabbit

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(pair of) SILVER-7 TUBE AMPs

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Location: TN Native Languishing in VA

Post Thu Mar 01, 2012 6:01 pm

Re: Help troubleshooting CF amps.....

Bob's reply:

Sent: Thursday, March 1, 2012 4:20 PM
Subject: Re: Need help with CarverFest amplifiers, Please!!
Hi Gary, wow, trouble in river city!

First thing is get some good output tubes. The Electro Harmonix are great and have a nice high voltage rating.
Then replace the DC restorer 1n4148 diodes with 1n4004 units. Replace the 15 volt zener with two 5 watt units hooked in parallel. Amp should work then. As for blowing fuses immediately, check the power supply diodes for a short. Use a simple VTVM and just measure them in-circuit. If one shows a dead short, replace it. As for the hum unit, it sounds as if the AC line is somehow connected wrong. Just inspect it careful and I'm sure you will find the problem just by looking hard with your eyeballs. Be careful, because right now I think you may have a severe shock hazard on your hands with this amp until you find the trouble.

If all else fails, send them to me. I'll fix 'em right up!

No sweat,
Bob Carver
TNRabbit
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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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kingman

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(pair of) SILVER-7 TUBE AMPs

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Post Thu Mar 01, 2012 7:14 pm

Re: Help troubleshooting CF amps.....

What a guy!!! *5* BTW.. I am running the Electro Harmonix in 4 with no issues but addictive sound!!!! 8) 8) 8)
In reality, it only matters what it sounds like to YOU!!!
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TNRabbit

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(pair of) SILVER-7 TUBE AMPs

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Post Thu Mar 01, 2012 10:38 pm

Re: Help troubleshooting CF amps.....

My first question is why were we told to use 15 watt zeners when they are supposed to be 5 watt??

Edit: Sorry, meant to say 15 volt. That's what is in there.
Last edited by TNRabbit on Fri Mar 02, 2012 7:09 am, edited 1 time in total.
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

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Location: Woodinville Wa

Post Thu Mar 01, 2012 11:12 pm

Re: Help troubleshooting CF amps.....

on the bias circuit you need 2 of these....1N5352B 15V 5watt zener
what do you have in there now?

what do you have on the High voltage side of things?
stock diodes are 1N5399
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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hewlew1

"You Fuckin' Fucks"

Posts: 1220

Joined: Tue Feb 17, 2004 11:02 pm

Location: Northeast, Pa

Post Fri Mar 02, 2012 12:02 am

Re: Help troubleshooting CF amps.....

I dont think our amps have a DC restorer circuit. Bob states to change the 1N4148 diodes thet dont exist . Am I right? Is ther a mod for this DC restorer circuit if there is can we get bob to draw it up for us? I would like to add it to my amps.
"Carver Audio, why settle for less, just ask my neighbors"
C1,C2,CT3,CT6,CT7/3,CT23,CT26,C4000,The Receiver,M500,M500T/6,M1.5T,TFM24/2,TFM/25/2,TFM35,TFM35X,TFM/42,DTL200,TDR1700,DPL20,TX11,5.2Center,5.1Sub/3,Original Amazings,Platinum Amazings/2,AL3'S,Polk SDA SRS, Polk SDA 1C's, Polk RTA11's, Polk Monitor 10's,Monitor 7's, Sunfire 300x2 /5, Sunfire pre, Sunfire MK2 Sub, 4 Carverfest monoblocks, Mapletree Audio Designs Tube Preamp,Phase Linear Andromeda III speakers, Phase Linear 4000 Preamp, Dahlquist DQ-10's
CERTIFIED AMPLE PLIERS EXPERT
Some of the best fuckings we get during our lifetime will come from a relative!
I don't kiss ass and I dont take peoples shit, so dont expect it from me!
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mbskeam

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Location: Woodinville Wa

Post Fri Mar 02, 2012 1:49 am

Re: Help troubleshooting CF amps.....

Bob refers to the DC restoration mod to the bias circuit in his old amps that he is selling on ebay using Zener diodes.

on our amps:
the orig circuit had two 7.5v 1watt Zener diodes in series, these did not work
so now you use two 15v 5watt in parallel.
I dont have the number as my print has a pen mark thru this area and can not see the number.


Image
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: 1585

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Location: wisconsin,home of the Green Bay Packers!

Post Fri Mar 02, 2012 2:21 am

Re: Help troubleshooting CF amps.....

I bought 2 in53529-tp, thats what bob said to buy way back at the start!! will these work? :? they are 5w 15 volt?
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 & Dared SL-2000A tube preamp, Carver AL3 amazing speakers in natural oak & Douglas connection cables
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hewlew1

"You Fuckin' Fucks"

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Location: Northeast, Pa

Post Fri Mar 02, 2012 9:28 am

Re: Help troubleshooting CF amps.....

Mike , A 1n4148 diode is a high speed switching diode in a glass envelope. It is not a zener diode so this is why I stated they dont exist in our amps.
"Carver Audio, why settle for less, just ask my neighbors"
C1,C2,CT3,CT6,CT7/3,CT23,CT26,C4000,The Receiver,M500,M500T/6,M1.5T,TFM24/2,TFM/25/2,TFM35,TFM35X,TFM/42,DTL200,TDR1700,DPL20,TX11,5.2Center,5.1Sub/3,Original Amazings,Platinum Amazings/2,AL3'S,Polk SDA SRS, Polk SDA 1C's, Polk RTA11's, Polk Monitor 10's,Monitor 7's, Sunfire 300x2 /5, Sunfire pre, Sunfire MK2 Sub, 4 Carverfest monoblocks, Mapletree Audio Designs Tube Preamp,Phase Linear Andromeda III speakers, Phase Linear 4000 Preamp, Dahlquist DQ-10's
CERTIFIED AMPLE PLIERS EXPERT
Some of the best fuckings we get during our lifetime will come from a relative!
I don't kiss ass and I dont take peoples shit, so dont expect it from me!
<<

hewlew1

"You Fuckin' Fucks"

Posts: 1220

Joined: Tue Feb 17, 2004 11:02 pm

Location: Northeast, Pa

Post Fri Mar 02, 2012 9:33 am

Re: Help troubleshooting CF amps.....

Al, The diodes you have are the correct ones, now get your fucking soldering iron out and put the damn things in already! :lol: :lol: :lol:
"Carver Audio, why settle for less, just ask my neighbors"
C1,C2,CT3,CT6,CT7/3,CT23,CT26,C4000,The Receiver,M500,M500T/6,M1.5T,TFM24/2,TFM/25/2,TFM35,TFM35X,TFM/42,DTL200,TDR1700,DPL20,TX11,5.2Center,5.1Sub/3,Original Amazings,Platinum Amazings/2,AL3'S,Polk SDA SRS, Polk SDA 1C's, Polk RTA11's, Polk Monitor 10's,Monitor 7's, Sunfire 300x2 /5, Sunfire pre, Sunfire MK2 Sub, 4 Carverfest monoblocks, Mapletree Audio Designs Tube Preamp,Phase Linear Andromeda III speakers, Phase Linear 4000 Preamp, Dahlquist DQ-10's
CERTIFIED AMPLE PLIERS EXPERT
Some of the best fuckings we get during our lifetime will come from a relative!
I don't kiss ass and I dont take peoples shit, so dont expect it from me!
<<

TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13303

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Fri Mar 02, 2012 11:05 am

Re: Help troubleshooting CF amps.....

mbskeam wrote:on the bias circuit you need 2 of these....1N5352B 15V 5watt zener
what do you have in there now?

what do you have on the High voltage side of things?
stock diodes are 1N5399



The DC restorer is the same you helped me with earlier in this thread; 15 volt/5 watt.

The rectifier diodes on the xformer output are upgraded models based on advice from Mark (radioeng): http://parts.digikey.com/1/parts/106807 ... 100eg.html

Technical/Catalog Information MUR4100EG
Vendor ON Semiconductor
Category Discrete Semiconductor Products
Diode Type Standard
Voltage - DC Reverse (Vr) (Max) 1000V (1kV)
Current - Average Rectified (Io) 4A
Voltage - Forward (Vf) (Max) @ If 1.85V @ 4A
Reverse Recovery Time (trr) 100ns
Current - Reverse Leakage @ Vr 25µA @ 1000V
Speed Fast Recovery =< 500ns, > 200mA (Io)
Mounting Type Through Hole
Package / Case DO-201AD, Axial
Packaging Bulk
Capacitance @ Vr, F -
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

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SILVER-7t

Posts: 1961

Joined: Mon Jan 25, 2010 2:32 am

Location: Woodinville Wa

Post Fri Mar 02, 2012 12:37 pm

Re: Help troubleshooting CF amps.....

Mike , A 1n4148 diode is a high speed switching diode in a glass envelope. It is not a zener diode so this is why I stated they dont exist in our amps.


thats because Bob had us take them out,
on mine I killed one when I soldered it in line, then we made a set with longer leads, it worked for a few minutes then the amp red plated.
Bob then cut out the diodes and the amp worked....
this happened on the 1st few amps, so Bob had us not install them as the burnt up....
I dont know if the orig was a Zener
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: 13303

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Fri Mar 02, 2012 2:47 pm

Re: Help troubleshooting CF amps.....

Rectifier Diodes, Harry. They're on the transformer high-voltage output:

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: 13303

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Tue Mar 20, 2012 1:00 pm

Re: Help troubleshooting CF amps.....

I sent these puppies off to Bob today~
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

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TFM-45

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Location: Spotsylvania, VA

Post Tue Mar 20, 2012 2:24 pm

Re: Help troubleshooting CF amps.....

Yay!! Thank you for all the hard work on these. =D> =D> =D> Now hook some damn speakers up
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, 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 - empty, Klipschorns

2 channel - Audio Note Kit 1 300b SET, Audio Note DAC 2.1, Altec A4's
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TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13303

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Tue Mar 20, 2012 4:08 pm

Re: Help troubleshooting CF amps.....

Robin, left you a message. I'm getting in the shower, so don't call just yet~ :lol:
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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