Dynakit (Dynaco) Mark III Mono Tube Amplifier

Dynakit / Dynaco Mark III Mono Tube Amplifier "Special Order"

This is a Special Order Unit. Our "special order" Dynaco MK III units are available for (pre-paid) purchase, they are custom built per order so expect a 3-4 week waiting period. This gives us time to order the parts and options you've selected then assemble and test the unit. Often there will be a few orders to complete before we get to your build. There are component varieties, combinations and brands we have found to be top performers so you "pick and choose" from these and we build you a great sounding amp around them.

The photos shown are of previous units to provide visual examples. Generally speaking, most units look very similar when completed but your specific unit will have all the special features you have chosen.

Price shown is for one (single) MK III amplifier.
Price does not include tubes.

You are not required to purchase the tubes from us, but we'd appreciate it. Your amplifier will still be fully tested, but it will ship without tubes, unless you purchase the tubes from us. We sell Apex matched tubes

An article about tube selection can be viewed here.....

Each MKIII uses the tubes listed below:

• (2) KT88 Tubes
• (1) 5AR4 Tube
• (1) 6AN8A Tube

Available Upgrades / Options:

Beyond great build quality we go even further, to assemble a complement of high performance and reliable components to ensure the performance and sonic capabilities of these amps. (photos show several different sets of amplifiers from previous builds / customers and may reflect use of different components than described in the ad)

An amplifiers job is simply to amplify, that's what these do and they do so in spectacular fashion. Your preamp and speakers will ultimately complete and determine the end result of your systems sound. These amps are very transparent and have the power to push even large speakers to incredible listening levels. Simply the ultimate in stereo separation and realism, the monoblock amplifiers deliver the music like nothing else can.

These MK III amps feature Premium Dynakit 80/40/30/20uF multi section capacitors which are rated for 550V (600V surge)

Each amplifier has a genuine Dynakit P-782 power transformer plus a an A-431 Output Transformer - The original (vintage) transformers are inarguably excellent, but they were designed to operate on 117 volts (think 1950's). Today's household AC current is often near and occasionally higher then 125 volts, so the use of a "step down" or "bucking" transformer is necessary to reduce the voltage down to a safe operating level for any vintage amp having its original transformers. These modern Dynakit transformers are manufactured to work from standard, modern 120-125 volt household AC current. They operate cooler, produce less distortion and outperform vintage transformers in every category. These transformers were reverse engineered from the original designs using many modern manufacturing technologies and superior insulations. These are super high quality USA made transformers that meet and exceed every aspect of the originals. Modern advancements in materials, combined with traditional methods and better technologies used in the manufacturing has resulted in absolutely superb transformers that produce improved sonics and cleaner power. These transformers provide less distortion and increased reliability. 

An inrush current limiter is incorporated into the AC mains to gently apply power during initial start up.

Each MK III circuit board is a stock Dynaco PC-1 using the original circuit and a single 6AN8A tube. The standard build feature CDE 942C series capacitors for superior sonic performance and reliability. The 942 series have polypropylene film and dual metallized electrodes for both self healing properties and high peak current carrying capability. These are simply some of the best caps on the market at any price, they sound phenomenal. The smaller caps are silver mica.

The resistors used in the standard build are carbon films in the audio path and metal film/metal oxide in the power circuit for superb accuracy while retaining the warmth so desirable in tube amplification.

The bias and power supply features 100uF 100 Volt rated electrolytic capacitors for outstanding electrical performance.

All of the wiring is 22 AWG USA made stranded wire and is carefully and properly routed and secured in the chassis. All soldering was done with Kester 60/40 rosin core.

Of course the amps have the Genuine Dynakit Shielded choke #C-354 for extra quiet operation.

The amplifier includes the original bias set and adjustment pots. You can upgrade to the bias balance control for more accurate and balanced tube biasing.

Standard pricing includes original style screw terminal speaker jacks for 4, 8 and 16 ohm loads. You have the option to upgrade to binding posts if you like.

A 3 Prong Grounded Power Cord is standard.

Genuine Dynakit mirror Polished stainless steel chassis.

Price includes Brown or Black cover and label.