Help troubleshooting CF amps.....

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frenchguy
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Re: Help troubleshooting CF amps.....

Post by frenchguy » Thu Feb 23, 2012 1:04 am

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!!!!! :? :?
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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Re: Help troubleshooting CF amps.....

Post by TNRabbit » Thu Feb 23, 2012 1:12 am

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.
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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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Re: Help troubleshooting CF amps.....

Post by frenchguy » Thu Feb 23, 2012 1:25 am

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!!
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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Re: Help troubleshooting CF amps.....

Post by angelod307 » Thu Feb 23, 2012 2:23 am

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.
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Re: Help troubleshooting CF amps.....

Post by TNRabbit » Thu Feb 23, 2012 2:43 am

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

Sunfire TG-IV/400~7 Amp
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Main: HotRodded AL-IIIs
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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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Re: Help troubleshooting CF amps.....

Post by TNRabbit » Thu Feb 23, 2012 9:06 am

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.

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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
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Main: HotRodded AL-IIIs
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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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Re: Help troubleshooting CF amps.....

Post by TNRabbit » Thu Feb 23, 2012 8:14 pm

Well, swapped the wires (polarity) & still have the same problem. I'm beginning to think I may have a bad transformer.....
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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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Re: Help troubleshooting CF amps.....

Post by tinpan » Fri Feb 24, 2012 10:59 am

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.
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Re: Help troubleshooting CF amps.....

Post by TNRabbit » Fri Feb 24, 2012 12:50 pm

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 1988 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
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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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Re: Help troubleshooting CF amps.....

Post by AlexSauter » Fri Feb 24, 2012 3:33 pm

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:
martin1970;87383 wrote: 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.
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
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Re: Help troubleshooting CF amps.....

Post by TNRabbit » Fri Feb 24, 2012 3:46 pm

"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?
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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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Re: Help troubleshooting CF amps.....

Post by AlexSauter » Sat Feb 25, 2012 2:26 pm

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
My system (sitting in the garage):

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Carver Pro PT-1800
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Re: Help troubleshooting CF amps.....

Post by TNRabbit » Thu Mar 01, 2012 10:00 am

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
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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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Re: Help troubleshooting CF amps.....

Post by mbskeam » Thu Mar 01, 2012 3:57 pm

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....
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Re: Help troubleshooting CF amps.....

Post by TNRabbit » Thu Mar 01, 2012 5:15 pm

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.
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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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