www.diyaudioprojects.com Open in urlscan Pro
2606:4700:3034::ac43:91a1  Public Scan

Form analysis
2 forms found in the DOM

http://diyaudioprojects.com/search.htm

<form action="http://diyaudioprojects.com/search.htm" id="cse-search-box">
  <div>
    <input type="hidden" name="cx" value="partner-pub-0863621997902329:9l0oyjijt7f">
    <input type="hidden" name="cof" value="FORID:11">
    <input type="hidden" name="ie" value="ISO-8859-1">
    <input type="text" name="q" size="50" placeholder="" style="background: url(&quot;https://www.google.com/cse/static/images/1x/en/branding.png&quot;) left 9px top 50% no-repeat rgb(255, 255, 255);">
    <input type="submit" name="sa" value="Search">
  </div>
  <input name="siteurl" value="www.diyaudioprojects.com/" type="hidden"><input name="ref" value="" type="hidden"><input name="ss" value="" type="hidden">
</form>

POST //translate.googleapis.com/translate_voting?client=te

<form id="goog-gt-votingForm" action="//translate.googleapis.com/translate_voting?client=te" method="post" target="votingFrame" class="VIpgJd-yAWNEb-hvhgNd-aXYTce"><input type="text" name="sl" id="goog-gt-votingInputSrcLang"><input type="text"
    name="tl" id="goog-gt-votingInputTrgLang"><input type="text" name="query" id="goog-gt-votingInputSrcText"><input type="text" name="gtrans" id="goog-gt-votingInputTrgText"><input type="text" name="vote" id="goog-gt-votingInputVote"></form>

Text Content

 * DIY Audio Projects
 * DIY Audio Forum
 * DIY Audio Photo Gallery
 * DIY Audio Blog


   NEW   Matt presents bias and operation data for the 6V6 tube in SE operation
- 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.
 * DIY Audio Projects
 * DIY Tube Projects
 * DIY Tube Amp Kits
 * DIY Speaker Projects
 * Speaker Drivers / Tweeters
 * DIY Solid State Projects
 * DIY IC / Op-amp Projects
 * DIY Phono Projects
 * DIY Cable Projects
 * Misc. Audio Projects
 * Hi-Fi Audio Schematics
 * Technical Audio Information
 * Testing Equipment / Tools
 * DIY Audio Links
 * Contact / About Us


















DIY AUDIO PROJECTS - DIY HI-FI FOR AUDIOPHILES


DIY AUDIO PROJECTS

Do-It-Yourself (DIY) Audio Projects - projects for audiophiles, hi-fi
enthusiasts, music lovers, electronic hobbyists, woodworkers and those who like
to learn, build and listen to music. This site exists to promote the hobby of
DIY Audio. There is nothing for sale here. All project documentation presented
on this site is free for personal non-commercial use. If you have a DIY Audio
Project that you would like to share with others through this site, or if you
have any comments, contact us or post a message on the DIY Audio Projects Forum.
Questions about a specific projects can be sent to the project author noted at
the top of the project page. If you are new to DIY Audio but want to learn more,
take a look at our DIY Audio Book recommendations.

Last update: 17 January 2022

Follow DIY Audio Projects



Powered by Translate

Share

--------------------------------------------------------------------------------


DIY AUDIO PROJECTS



These are some of our featured DIY audio projects. For more DIY projects, use
the navigation menu on the left hand side of the page.

Cranberry TwoC - All Tube Stereo Amplifier - 17 January 2022      NEW 
Bruce Heran describes the design and construction of the Cranberry TwoC a stereo
integrated all tube amplifier. The Cranberry tube amplifier can be used with
pentode or beam power vacuum tubes like 6L6GC, EL34, KT77, KT88 and KT120. The
amplifier circuit is biased into Class-A, ultra-linear operation and output
power will be dependent on the tubes utilized. The input stage is a SRPP design
and can be used with 6/12SN7 or higher gain 6/12SL7 preamp tubes.

--------------------------------------------------------------------------------

High Fidelity Tube Junk Box Audio Amplifier - 10 November 2019  

Bruce Heran outlines the design and construction of a High Fidelity Tube Junk
Box Audio Amplifier (JBAA). The schematic is similar to the PoddWatt design and
able to use a huge variety of tubes. The JBAA tube amplifier can use a 12AX7,
12AU7, ECC82, ECC83, 5751, 12SL7 or 6SL7 in the driver position while 6V6, 6AQ5,
6005, 6Y6G, EL84, 6BQ5, 6F5P, 6P15P-EB, 6Y6GA, 6K6, 6W6, 6GV8, 6BM8, ECL82 or
ECL85 can be used for the output tubes. The circuit is biased into Class-A,
ultra-linear operation and output power will be dependent on the tubes utilized.

--------------------------------------------------------------------------------

6CY7 Single-Ended Triode (SET) Amplifier - 30 July 2016  
This inexpensive Single-Ended Triode (SET) amp is built around a pair of 6CY7
vertical deflection dual triodes built for TVs. At full output the amp produces
a clean 1.3 Watts output per channel into 8Ω. The Edcor XSE output transformers
are rated from 70Hz to 18kHz. This amplifier did a little better than this
having a -3dB bandwidth from about 46Hz to about 30kHz. The 6CY7 stereo amp uses
a 6CA4 tube rectified power supply with excellent channel separation. Matt
reports: This is quickly becoming my favorite amp. I currently have a set of NOS
Sylvania tubes in it, but I have also used a set of old used GE tubes which
sound just as good. I highly recommend that anyone looking for a little iPod or
computer amp give this one a try.

--------------------------------------------------------------------------------

DIY JFET MC Pre-Preamp Kit - 19 Sept 2015      KIT     Low Voltage 
This is the Boozhound Laboratories JFET Moving-Coil (MC) Pre-Preamp Kit. The MC
pre-preamp kit consists of a PCB, standoffs, the circuit parts and building
instructions. The builder will need to provide a 12-24VDC power supply, an
enclosure and miscellaneous hardware like connectors and switches. The kit uses
2SK170 JFET transistors and comes with fabulous vintage Russian military
paper-in-oil (PIO) capacitors. Mark uses 9V batteries for the power supply and
is very pleased with the results.

--------------------------------------------------------------------------------

6EM7 Single-Ended Triode (SET) Amplifier - 29 June 2015  

Matt describes the design and construction of a Single-Ended Triode (SET)
amplifier built around a pair of 6EM7 double triode tubes. The clean output
power from the 6EM7 SET amplifier is about 2.2 Watts per channel with a
frequency response that matches the audio output transformers. The single-ended
6EM7 amplifier is housed in a vertical wooden chassis that has been styled after
early vacuum tube equipment of the 1920s. The 6EM7 SET amplifier uses a 6CA4
tube rectified power supply with excellent channel separation and which is very
quiet. Matt reports that the 6EM7 amplifier sounds wonderful! The bass is well
articulated without being boomy, mid-tones are clear and even, and the highs are
crystal clear.

--------------------------------------------------------------------------------

Fostex FE206En in Back-Loaded Horn Speaker Cabinets - 1 September 2014  

Once again Mark tries on the Fostex FE206En high sensitivity fullrange driver,
but this time the end result is a large elaborate back-loaded horn loudspeaker.
The speaker cabinet plans are from the FE206En driver datasheet. The horn
loudspeaker cabinets are made from 21 mm thick pine plywood and use a single
FE206En fullrange driver and no crossover. Australian beeswax is used on the
outside of the horn cabinet and heavy cedar oil was applied to the mouth of the
horn. The sensitivity of the FE206En driver is greater than 96 dB / 1W / 1m, so
the rear-loaded horn speakers are very well suited for use with very low power
tube amplifiers. Mark reports that the horn speakers can draw an extremely
accurate soundstage, sound excellent and have lead to a whole new listening
experience with Paris, a 2.5W 6EM7 SET amplifier.

--------------------------------------------------------------------------------

DIY 300B Single-Ended-Triode (SET) Hi-Fi Amplifier - 24 March 2014  
This DIY 300B triode amplifier project was completed by Stamou Tasos who is from
Greece. As a thank you for the 300B amplifier schematics, Stamou has shared his
implementation of the 300B single-ended tube amplifier schematic by J.C.
Morrison. The 300B SET amp uses a 6SN7 direct coupled driver stage and an all
low mu triode array. The power supply filtering sections have been duplicated
for each channel for this 300B triode amplifier and premium parts are used
throughout. The audio output transformers are Lundahl LL1623. This is a great
sounding 300B triode amplifier that I am sure DIYers will find very rewarding.

--------------------------------------------------------------------------------

4S Universal Preamplifier for 12A*7 Tubes - 15 December 2013  
The 4S Universal preamp is a Super Simple Single Stage (4S) line level Hi-Fi
preamplifier that works well with the entire range of 12A*7 tubes - 12AU7,
12AV7, 12AY7, 12AT7, 12AZ7, and 12AX7. You can change the tube type to vary the
sound and gain considerably. The preamp uses a 6CA4 tube rectified power supply
which is very quiet. The Universal preamp is fun as it allows tube rolling to
compare various tubes in your stash. This is a great simple preamplifier unit to
bring out the most in your power amps.

--------------------------------------------------------------------------------

Fostex FE103En Bass Reflex Bookshelf / Nearfield Monitor Speakers - 14 Apr 2013
 
Gio has put together a small bookshelf / monitor speaker using a single
inexpensive fullrange speaker driver. The enclosure is a 6.9 L bass reflex
cabinet tuned to about 95 Hz that follows the speaker box plans included with
the driver datasheet. The loudspeakers use a single Fostex FE103En fullrange
driver with no crossover circuit. The speakers work well as nearfield monitors
and combined with a subwoofer the speakers can be used for home theater duties.

--------------------------------------------------------------------------------

DIY 6DJ8 (ECC88) Tube Headphone Amplifier - 24 November 2012  
This low power tube headphone amplifier project comes from Bruce Heran. The
simple tube headamp uses one 6DJ8 (ECC88) tube per channel. The amplifier
circuit is push-pull and biased into class-A operation with a CCS. Gain is
sufficient that no driver stage is required for the tube amp. The 6DJ8 tube
headphone amplifier is suitable for use with many Hi-Fi headphones. Output power
is over 100 mW between 32 ohms to 300 ohms. The response is 20 Hz to 28 kHz
within 0.5 dB and the wide band signal-to-noise is -84 dB.

--------------------------------------------------------------------------------

Speaker Projects Gallery - Parts-Express.com - [External Link]

Check out the Parts-Express.com Speaker Projects Gallery for a wide range of DIY
Loudspeaker projects. The Speaker Projects Gallery features over 50 DIY speaker
projects that have been built by other DIY audio enthusiasts. Each speaker
project includes complete drawings to illustrate construction of the speaker
enclosure, crossover schematics, a full parts list and photographs of the
finished speaker project.

Shown in the photo to the left is the TriTrix MTM TL DIY speaker project. For
those who are not great with woodworking, the TriTrix is available as complete
kit.

--------------------------------------------------------------------------------

DIY EL84 Push-Pull (Class-A, Ultra-Linear) Amplifier - 30 September 2012  
Bruce Heran of OddWatt Audio outlines the design and construction of monoblock
Push-Pull EL84 (6BQ5) valve amplifiers. The Mini Block tube amps use a 5751 twin
triode to drive the EL84 push-pull output stage which is biased into class-A
operation, ultra-linear mode. Output power is 5.8 W @ 2% (0.25% @ 1 W) and the
response is 10 Hz to 44 kHz within 0.2 dB. Bruce reports that the Mini Blocks
are more powerful than the Poddwatts and seem to have more detail while
retaining all the good characteristics of the Poddwatt amps.

--------------------------------------------------------------------------------

Fostex FE206En Double Bass-Reflex Speaker Project - 17 September 2012  

Mark has put together his second set of the Fostex FE206En double bass-reflex
speakers. The speaker box plans are from the datasheet that was supplied with
the drivers. The loudspeakers use a single Fostex FE206En fullrange driver and
no crossover. The sensitivity of the drivers is about 96 dB / 1W / 1m, so the
double bass-reflex speakers are well suited for use with flea and low power tube
amps. The two chamber box design extracts good bottom end from these low
displacement drivers. The speakers will be used in a home theater so for a
non-reflective finish the speaker enclosures are painted with a undercoating
paint for a stipple like finish and flat black paint. Mark reports that the
speakers are an excellent mate for use with his 2.5W 6EM7 SET amp.

--------------------------------------------------------------------------------

DIY Stepped Attenuator Volume Control - 21 June 2012  

In this DIY attenuator project Matt uses an inexpensive ladder type stepped
attenuator to make a passive stereo volume control. The switched attenuator
comes fully assembled and uses 1% precision metal film resistors on a make
before break 2-pole (stereo) 24-position switch. Checking noise, Matt found that
the stepped attenuator has a noise figure which is about 26dB lower than a PEC
hot molded carbon potentiometer of the same value. This attenuator project is
simple to build and should save you some money if you are in the market for a
passive hi-fi volume control.

--------------------------------------------------------------------------------

DIY Hi-Fi Phono Turntable - 26 March 2012  

Nandor a very talented DIYer from Hungary has built this fabulous looking Hi-Fi
record player. The DIY turntable project uses the platter and the direct drive
motor assembly and controls from a Dual 701 record player. The tonearm is built
from scratch following a magnetically Stabilized design which means that there
are no fixed pivot points or bearings. The turntable plinth is made using
stacked layers of plywood. A DIY record weight rounds out this challenging DIY
record player project.

--------------------------------------------------------------------------------

DIY Shielded RCA Interconnect Cables - 22 February 2012  

Tom has put together an instructional guide to construct simple line-level RCA
interconnect cables. The cables use shielded instrument wire and is very simple
to construct requiring only some basic soldering skills. The required parts are
easy to source and a pair of these shielded RCA cables can be built for as
little as $10. Use these simple DIY cables to upgrade your stock and inexpensive
interconnects.

--------------------------------------------------------------------------------



--------------------------------------------------------------------------------

DIY 12AU7 (ECC82) / IRF510 Headphone Amplifier - 12 April 2010      Low Voltage 

Rogers has built an improved version of his popular and simple low voltage 12AU7
/ IRF612 Headphone Amplifier (5 Aug 2008). The new version allows novice
builders to experience assembling and listening to their own headamp. The
headphone amplifier is similar to the previous version in that a single 12AU7
(ECC82) vacuum tube is used for voltage gain and an IRF510 MOSFET follower stage
is used to provide current to drive demanding headphones. The hybrid tube and
MOSFET amplifier operates off a 12V SLA battery so there are no high voltage
concerns. The main difference from the original version is that a LM317
regulator is used as a CCS to bias the MOSFET into class-A operation instead of
a load resistor. The project includes PCB image files and can also be built on a
protoboard. This simple headphone amp can be built for about $40-50.

--------------------------------------------------------------------------------

Tang Band D4-1 DIY Back Horn Speaker Kit - 10 March 2010      KIT 

The D4-1 DIY Back Horn Speaker Kit put together by Tang Band is very simple to
build, sleek looking and sounds great. The DIY speaker kit comes complete with
all the parts and tools required (except for a soldering iron) to build a great
looking, little rear loaded single driver horn speaker system. There is no
cutting or finishing (painting / staining) required to complete the speaker kit.
The small horn speaker kit goes together much like ready-to-assemble furniture.
The end result is an attractive and compact horn speaker that sounds great and
is fun to build.

--------------------------------------------------------------------------------

DIY 6L6 / 5881 Single-Ended (SE) Tube Amplifier - 9 February 2010  

This fantastic looking tube amplifier was put together by Mr. Chey in Thailand.
The DIY enclosure is constructed from aluminum sections and the audio output
transformer covers are built using copper clad board. The circuit is very
simple, a single-ended output stage using 6L6 or 5881 tubes, driven by 6SJ7 or
6SD7 cutoff pentodes. Mr. Chey is very pleased with the results and has replaced
his solid state amp with this beauty. Nice work!

--------------------------------------------------------------------------------

DIY KT88 Push-Pull Monoblock Tube Amp Kit - 30 November 2009      KIT 

A build and review of the Odd Block KT88 Series 1 Tube Amp Kits. The monoblock
tube amp kit uses an SRPP input stage with 5751 driver tubes and a push-pull
output stage with KT88 power tubes. A constant current source (LM317HVT voltage
regulator) is used to force the output stage into class-A operation. A solid
state power supply is used. The tube amp kit comes with a nice steel enclosure
and the power output is about 25 watts. The amplifier circuit is very simple
with minimal parts in the signal path. The result is a very nice sounding tube
amplifier kit that performs well.

--------------------------------------------------------------------------------

DIY Low-Inductance Speaker Cables - 19 May 2009      Recommended 

Adam has put together another fine looking set of Do-It-Yourself (DIY) Speaker
Cables for his DIY 3-Way Hi-Vi Tower Loudspeakers. The cables are very simple to
construct and are comprised of 16 gauge wires that are twisted together in
alternating directions. The cable geometry results in a very low-inductance
speaker cable with an equivalent wire gauge 10 so insertion losses are also low.
High quality gold plated banana plugs, TechFlex and a laser etched decorative
Oak Sleeve round off a very nice looking cable that rivals the performance of
high quality commercial cable offerings.

--------------------------------------------------------------------------------

KT88 Push-Pull Mono Block Tube Amplifier Project - 29 October 2008     UPDATED 
(9 Oct 2012)
Bruce's second follow up to his original "OddWatt" project are the "Odd Blocks",
a pair of KT88 Push-Pull Mono Block Tube Amplifiers. Like the Oddwatt 225, the
mono blocks are scalable and can be used with a number of octal tubes (KT77,
6CA7, EL34, 6L6GC, KT88, 6550, KT90). Like the previous projects the driver
stage is an SRPP but this time with the 12SL7 tube. The output stage is a
Class-A UL SIPP using KT88 tubes. LM317HV Regulators are used for the cathode
CCS.



Last updated 10 November 2019. © diyAudioProjects.com - Terms of Service -
Privacy Policy
Original text

Rate this translation
Your feedback will be used to help improve Google Translate