Specifications
DIY Tube Stereo 35 Board - TubeZone Assembled -Instructions - Page 2
READ ME FIRST!
This is a modified version of the usual disclaimer/warning that comes with most transmitting
equipment and parts.
Since similar conditions exist in all tube audio amplifiers we believe it be appropriate here.
Please note prior to beginning construction that there are high(over 400 volts) DC and AC
voltages present in the equipment you are about to work on, and in the right situation these
voltages could injure or kill you if you contact them. Normally the worst you can encounter is a
nasty shock, however you must remember at all times this possibility of a injurious situation.
Follow the same precautions you would with any electrical appliance,including not working
with plugged in equipment (including soldering irons) with bare feet on a wet floor, use only
insulated probes & tools when working on live high voltage, and if you are working with one
hand taking measurements or working in live equipment, keep the other hand off the chassis
or other grounded conductive item. Always use the proper size fuse or circuit breaker in the
equipment installed when operating amplifiers or any other electronic gear.
In a work situation you would be required to use eye protection when working with tools,
soldering, or testing equipment and we strongly recommend you do so also, and remind you that
when you fail to use safety glasses or follow recommendations regarding safety or simply do not
practice common sense about safe procedures, you do so completely at your own risk.
Failing or defective components in high voltage tube equipment, particularly elderly equipment,
when failing may arc, spark,smoke, spit, sputter, get hot enough to burn flesh, catch on fire,
rupture or shatter sending shards of possibly hot glass, metal, or plastic at your face or body
and may spew possibly hot and injurious goo or fluid, or cause normally harmless pieces of
metal to become electrically charged at dangerous voltages.
If you have no previous experience repairing high voltage equipment, you must have a
professional repair person to install this modification for you , or obtain competent
third party help and and obtain basic knowledge of electronic components, soldering, safety and construction
techniques prior to proceeding.
Disclaimer
Under no circumstances does diytube or Tubezone.net Inc assume liability or responsibility for injury or
damages sustained in the assembly, test or operation of this kit or for damages to any other equipment
connected to it. As this is a partial kit, proper assembly is buyer's responsibility. diytube reserves the right to
make design changes or improvements without the obligation to revise prior
versions. All specifications are subject to change without notice.
. WARNING: Lethal voltages (greater than 400VDC and mains voltage) are present in this project.
. Use a Variac or isolation transformer while working on and testing the unit.
. Use a rubber mat to stand on while working on and testing the unit.
. Keep one hand in your back pocket if probing voltages with a DMM.
. Wrap a small piece of electrical tape around the test lead probe shaft to expose
just the tip.
. Do not connect or disconnect wires to the terminals when unit is powered or plugged in.
. Lethal voltages exist in the capacitors even after unit is powered down, so wait
at least one hour to after unplugging to allow charge to dissipate.
Warranty and returns
UNINSTALLED and unmodified boards (meaning in identical condition as received from Tubezone.net Inc) may
be returned within 30 days for refund or credit, so you have that amount of time to consider your options and
decide whether installing this kit is within your capability.
Once installed, at my option, within 6 months of purchase, I will either supply repair parts to you to replace any
defective components, or repair the board to replace defective components. Repairs due to mis-wiring or other
user errors will be billed @ $50/hour. Defective tubes must be returned to be replaced. Any return postage
or shipping to send items back to me is on customer's account. I do not issue call tags or accept CODS.