DIY tube amps

Not sure where to post your Carver topic... Try here.
tkd.teacher
Newbie 50+
Posts: 73
Joined: Mon Feb 17, 2014 2:16 pm

Re: DIY tube amps

Post by tkd.teacher » Sun Feb 23, 2014 5:28 pm

hewlew1 wrote:John, You should make a Carverfest amp all of the schematics are available on this site, and essential iron is available from Edcor. Other than that the rest of the parts are readily available.A lot of us here have these already and would be able to answer your questions as well as provide direction on assembling it. 20 watts per channel in stereo or a 40 watt monoblock. A very vice little amp!
Where are the schematics?

John

angelod307
SILVER-7 TUBE AMP
Posts: 2652
Joined: Sat Jun 06, 2009 10:56 pm
Location: manning, sc

Re: DIY tube amps

Post by angelod307 » Sun Feb 23, 2014 5:30 pm

Schematics are Everywere on this site to a degree.

http://carveraudio.com/phpBB3/viewforum.php?f=136
CarverFest: I just go for the arts and crafts

tkd.teacher
Newbie 50+
Posts: 73
Joined: Mon Feb 17, 2014 2:16 pm

Re: DIY tube amps

Post by tkd.teacher » Sun Feb 23, 2014 5:35 pm

angelod307 wrote:Schematics are Everywere on this site to a degree.

http://carveraudio.com/phpBB3/viewforum.php?f=136
I found the link with the images for the 20w fest amp, but the images didn't survive the transition evidently.

John

hewlew1
"You Fuckin' Fucks"
Posts: 2045
Joined: Tue Feb 17, 2004 11:02 pm
Location: Northeast, Pa

Re: DIY tube amps

Post by hewlew1 » Sun Feb 23, 2014 6:18 pm

I see what you mean john I can not find any info no matter what I click on.
"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/25/3,TFM35,TFM35X,TFM42/2,DTL200,TDR1700,DPL20,TX11/2, 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/2 ,Monitor 7's, Sunfire 300x2 /5, Sunfire pre, Sunfire MK2 Sub/2, 4 Carverfest monoblocks, Carverfest linestage preamp/2, 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 come from a relative!
I don't kiss ass, I dont take peoples shit, so dont expect it from me!

User avatar
bob p
SILVER-7t
Posts: 1342
Joined: Wed Jul 18, 2007 10:40 pm
Location: Chicago

Re: DIY tube amps

Post by bob p » Sun Feb 23, 2014 6:55 pm

I looked for them too and I had the same result -- nothing.

This happens a lot when forum databases get moved from one site to another. It's not at all uncommon for someone to miss moving an image directory from one site to the next while maintaining it in the same relative path on one machine vs. the other.

I think that the attachments folder failed to get copied over in the transition, and now all of the file pointers in the message database are pointing to non-existent images in a non-existent folder. if we're lucky, maybe James can restore that directory to the proper relative path location?
Carver Preamps: C-1, C-2, BillD's JVD-modded C-4000, C-9
Carver Amplifiers: BillD's C-500, M-1.5t (4) PM-1.5 (4) M-500t (2)
Repair/Restoration/Upgrade expert for all of these components.

tkd.teacher
Newbie 50+
Posts: 73
Joined: Mon Feb 17, 2014 2:16 pm

Re: DIY tube amps

Post by tkd.teacher » Sun Feb 23, 2014 7:40 pm

bob p wrote:I looked for them too and I had the same result -- nothing.

This happens a lot when forum databases get moved from one site to another. It's not at all uncommon for someone to miss moving an image directory from one site to the next while maintaining it in the same relative path on one machine vs. the other.

I think that the attachments folder failed to get copied over in the transition, and now all of the file pointers in the message database are pointing to non-existent images in a non-existent folder. if we're lucky, maybe James can restore that directory to the proper relative path location?
That's kind of what I figured, either a config problem or just missed a folder. I found a few other images that weren't available either.

John

User avatar
mbskeam
(pair of) SILVER-7t's
Posts: 2147
Joined: Mon Jan 25, 2010 2:32 am
Location: Woodinville Wa

Re: DIY tube amps

Post by mbskeam » Sun Feb 23, 2014 8:56 pm

Mbskeam

SILVER 7's
Amazing Line Source
2 SVS PB16 SUBS
#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
WTL Amadeus GTA+DV DRT XV-1t
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"

User avatar
mbskeam
(pair of) SILVER-7t's
Posts: 2147
Joined: Mon Jan 25, 2010 2:32 am
Location: Woodinville Wa

Re: DIY tube amps

Post by mbskeam » Wed Feb 26, 2014 7:07 pm

Image

Image

Image

Image

Image

Image
Mbskeam

SILVER 7's
Amazing Line Source
2 SVS PB16 SUBS
#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
WTL Amadeus GTA+DV DRT XV-1t
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"

tkd.teacher
Newbie 50+
Posts: 73
Joined: Mon Feb 17, 2014 2:16 pm

Re: DIY tube amps

Post by tkd.teacher » Wed Feb 26, 2014 7:27 pm

Awesome, thank you very much!

I am assuming that someone who knows how to read schematics can glean a parts list out of those diagrams?

And where do you source the case for it? Any generic 6 tube case?

John

hewlew1
"You Fuckin' Fucks"
Posts: 2045
Joined: Tue Feb 17, 2004 11:02 pm
Location: Northeast, Pa

Re: DIY tube amps

Post by hewlew1 » Wed Feb 26, 2014 7:38 pm

John, you don't need a case if you don't want one. All you need is a piece of plate aluminum or steel if you wish and a step drill to make the holes for the tube sockets. The rest could be made with wood which you would set the plate material into. which would provide the depth to mount the components underneath.
"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/25/3,TFM35,TFM35X,TFM42/2,DTL200,TDR1700,DPL20,TX11/2, 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/2 ,Monitor 7's, Sunfire 300x2 /5, Sunfire pre, Sunfire MK2 Sub/2, 4 Carverfest monoblocks, Carverfest linestage preamp/2, 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 come from a relative!
I don't kiss ass, I dont take peoples shit, so dont expect it from me!

User avatar
bob p
SILVER-7t
Posts: 1342
Joined: Wed Jul 18, 2007 10:40 pm
Location: Chicago

Re: DIY tube amps

Post by bob p » Wed Feb 26, 2014 7:53 pm

So when you guys build this amp, how are you tuning the bias?

Are you:
a) measuring cathode current and swapping cathode resistors to tune the idle bias current, or
b) ordering spec'd tubes that have been binned according to their bias requirements, or
c) not worrying about it
Carver Preamps: C-1, C-2, BillD's JVD-modded C-4000, C-9
Carver Amplifiers: BillD's C-500, M-1.5t (4) PM-1.5 (4) M-500t (2)
Repair/Restoration/Upgrade expert for all of these components.

User avatar
mbskeam
(pair of) SILVER-7t's
Posts: 2147
Joined: Mon Jan 25, 2010 2:32 am
Location: Woodinville Wa

Re: DIY tube amps

Post by mbskeam » Wed Feb 26, 2014 8:13 pm

C
Mbskeam

SILVER 7's
Amazing Line Source
2 SVS PB16 SUBS
#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
WTL Amadeus GTA+DV DRT XV-1t
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"

User avatar
bob p
SILVER-7t
Posts: 1342
Joined: Wed Jul 18, 2007 10:40 pm
Location: Chicago

Re: DIY tube amps

Post by bob p » Wed Feb 26, 2014 8:15 pm

OK, next question: why are you using zeners to bypass caps instead of resistors?
Carver Preamps: C-1, C-2, BillD's JVD-modded C-4000, C-9
Carver Amplifiers: BillD's C-500, M-1.5t (4) PM-1.5 (4) M-500t (2)
Repair/Restoration/Upgrade expert for all of these components.

angelod307
SILVER-7 TUBE AMP
Posts: 2652
Joined: Sat Jun 06, 2009 10:56 pm
Location: manning, sc

Re: DIY tube amps

Post by angelod307 » Wed Feb 26, 2014 8:17 pm

I will also be selling some of these amps for hopefully more than not in the near future.
CarverFest: I just go for the arts and crafts

angelod307
SILVER-7 TUBE AMP
Posts: 2652
Joined: Sat Jun 06, 2009 10:56 pm
Location: manning, sc

Re: DIY tube amps

Post by angelod307 » Wed Feb 26, 2014 8:20 pm

bob p wrote:OK, next question: why are you using zeners to bypass caps instead of resistors?

With ten amps, i notice that the idle voltage varies, while a few are around 420, others are up to 455. My friend tubular joe came to us with a solution to help keep tubes from running away. What would be another way of making this safer for the tubes bob?
CarverFest: I just go for the arts and crafts

Post Reply

Return to “Misc. Discussions”