Krell KSA 50 Clone
Hello, I thought I would post some images of my latest project, a Krell KSA 50 clone. Each channel is completely seperate, with each using a 625VA toroidal transformer and 1.2 farads of capcitors. Each amplifier uses a heatsink block with a cooling fan in the centre. The circit boards are mounted upside-down underneath the heatsink block. The front of the amplifier, underneath the fans, is made from granite.
My speakers are a pair of B&W DM6's. The pre-amp is a Meridian 101B. The tuntable is a JBE Slatebed with an audiotechica AT32E moving coil cartridge.
Neil.
Veiw images - http://img203.imageshack.us/gal.php?g=bild0303l.jpg
Hello, I thought I would post some images of my latest project, a Krell KSA 50 clone. Each channel is completely seperate, with each using a 625VA toroidal transformer and 1.2 farads of capcitors. Each amplifier uses a heatsink block with a cooling fan in the centre. The circit boards are mounted upside-down underneath the heatsink block. The front of the amplifier, underneath the fans, is made from granite.
My speakers are a pair of B&W DM6's. The pre-amp is a Meridian 101B. The tuntable is a JBE Slatebed with an audiotechica AT32E moving coil cartridge.
Neil.
Veiw images - http://img203.imageshack.us/gal.php?g=bild0303l.jpg
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Last edited:
Germanium headphone amp
Just completed one channel of my new headphone amp and the second channel only needs to be tested and fine tuned, and then i am ready to build it into its housing.
This amp is based on the BC179B AC122 and AC187 transistors.
This project came to mind when i found these gold pin AC187 transistors for
80 Euro cents, and i had some matched gold pin BC179B transistors.
Then i mached the whole batch of 30 AC187 transistors for the highest Hfe and matched them according application in the circuit.
greets
Just completed one channel of my new headphone amp and the second channel only needs to be tested and fine tuned, and then i am ready to build it into its housing.
This amp is based on the BC179B AC122 and AC187 transistors.
This project came to mind when i found these gold pin AC187 transistors for
80 Euro cents, and i had some matched gold pin BC179B transistors.
Then i mached the whole batch of 30 AC187 transistors for the highest Hfe and matched them according application in the circuit.
greets
Attachments
A Cavalli Audio eXStatA (Electrostat headphone amplifier) build in progress...waiting for some parts so I can finish up the input wiring.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Last edited:
Banned
Joined 2002
After several months of consideration, I "slapped together" this sub woofer amp. DIY TAP plastic case (power line filter keeps most of the noise out).
Aussieamplifiers.com 150 watt module and older PS-3 filter board driving Pyle Driver 15" speaker in 30 year old Cerwin Vega woof woof box. (buried in room corner).
Aussieamplifiers.com 150 watt module and older PS-3 filter board driving Pyle Driver 15" speaker in 30 year old Cerwin Vega woof woof box. (buried in room corner).
Attachments
Last edited:
Borbely's Millenium75
Hi, showing off some pictures of the Borbely's Millenium75.
Class A all Fets, 75 Watt monoblock design. The heatsink is 25cm tall. Bias current is at 2.2A so it runs hot! During hot season like this, I need to to turn on the aircon to keep the room temp at 25C so the heatsink won't exceed 55C.
Hi, showing off some pictures of the Borbely's Millenium75.
Class A all Fets, 75 Watt monoblock design. The heatsink is 25cm tall. Bias current is at 2.2A so it runs hot! During hot season like this, I need to to turn on the aircon to keep the room temp at 25C so the heatsink won't exceed 55C.
Attachments
Last edited:
Banned
Joined 2002
This is the way I want to set up my current "DIY - AMP" project:
Mounting the 2 boards of Carlos Mergulhao's BlameES on a wooden MDF-plate (on the bottom, in the center: a small Soft-Power-On board
with 2 transformers generating the voltages needed for my PreAMP (above), on the left and right side on the bottom: space for 2 torroid -
transformers, still some space for a DAC) and nailing the MDF-plate to the wall above my desk.
But I need a "console" to house the terminals for the speakers, inch inputs, LCD-display of pre-amp, push-buttons, ...
How shall this console look like? Any idea?
Best regards - Rudi_Ratlos
P.S. This is a man's AMP.
Mounting the 2 boards of Carlos Mergulhao's BlameES on a wooden MDF-plate (on the bottom, in the center: a small Soft-Power-On board
with 2 transformers generating the voltages needed for my PreAMP (above), on the left and right side on the bottom: space for 2 torroid -
transformers, still some space for a DAC) and nailing the MDF-plate to the wall above my desk.
But I need a "console" to house the terminals for the speakers, inch inputs, LCD-display of pre-amp, push-buttons, ...
How shall this console look like? Any idea?
Best regards - Rudi_Ratlos
P.S. This is a man's AMP.
Last edited:
This is the way I want to set up my current "DIY - AMP" project:
Mounting the 2 boards of Carlos Mergulhao's BlameES on a wooden MDF-plate (on the bottom, in the center: a small Soft-Power-On board
with 2 transformers generating the voltages needed for my PreAMP (above), on the left and right side on the bottom: space for 2 torroid -
transformers, still some space for a DAC) and nailing the MDF-plate to the wall above my desk.
But I need a "console" to house the terminals for the speakers, inch inputs, LCD-display of pre-amp, push-buttons, ...
How shall this console look like? Any idea?
Best regards - Rudi_Ratlos
P.S. This is a man's AMP.
oh common!!!! don't tell me you are going to "cover" those beautiful boards with a chassis!. Very nice work.
active ground channel source follower headphone amp
This is a three channel active ground source follower headphone amp. The heat sink and volume knob are also DIY, in fact, if you include the medical expenses incurred as a result of making the volume knob many would consider the volume knob alone to be audiophile quality. Most of this amp came from my parts box. I scavenged a vandal resistant stop cover for a Sloan flush valve at work and turned a core from some scrap Delrin I had on my lathe to build the volume knob and I machined the heat sink using a chop saw and drill press. The front panel is just a scrap of bronze Acrylic I had laying around and the base is a scrap of Maple from my wood bin. She sounds wonderful and is a great conversation piece to boot.
This is a three channel active ground source follower headphone amp. The heat sink and volume knob are also DIY, in fact, if you include the medical expenses incurred as a result of making the volume knob many would consider the volume knob alone to be audiophile quality. Most of this amp came from my parts box. I scavenged a vandal resistant stop cover for a Sloan flush valve at work and turned a core from some scrap Delrin I had on my lathe to build the volume knob and I machined the heat sink using a chop saw and drill press. The front panel is just a scrap of bronze Acrylic I had laying around and the base is a scrap of Maple from my wood bin. She sounds wonderful and is a great conversation piece to boot.
