DIY-Central.com - Go Create something! - PCB Design, Electronics - Amplifiers http://www.diy-central.com/ Electronics, PCB, Audio, Recording, Studio - Build, Create, Hacks en-us DIY-Central.com Mon, 04 Jan 2010 17:02:59 GMT newtelligence dasBlog 1.9.6264.0 info@fivefish.net info@fivefish.net http://www.diy-central.com/Trackback.aspx?guid=c86846a6-48e6-4aac-873a-46ee70d841ba http://www.diy-central.com/pingback.aspx http://www.diy-central.com/PermaLink,guid,c86846a6-48e6-4aac-873a-46ee70d841ba.aspx DIY-Central.com Administrator
Featured above are working builds of the 8 Watt Ardmore and 1/2 Watt Gilmore Jr Kits designed by Gerhart Amplification tone wizard, Gary Gerhart.  Everything is included except solder (use 60/40 rosin core solder, no flux).  The chassis are finished for the Customer with all holes being drilled and punched.  Note the stainless steel PEM nuts press fitted into the chassis for a solid, quality build.  Kits feature a Mil-Std black anodize chassis, Mercury Magnetics power transformers, Gerhart Amplification's proprietary output transformers manufactured by Mercury Magnetics and all stainless steel chassis hardware.  The assembly manual guides the builder through each step.  The Gilmore Jr or Ardmore Kit are an excellent choice for those who are building for the first time, yet challenging enough for those who have built kits before.  Guytronix stands poised and ready to assist the builder throughout the assembly process.

Click here for more details. http://www.guytronix.com/

Low Wattage Guitar Amplifier Kits http://www.diy-central.com/PermaLink,guid,c86846a6-48e6-4aac-873a-46ee70d841ba.aspx http://www.diy-central.com/LowWattageGuitarAmplifierKits.aspx Mon, 04 Jan 2010 17:02:59 GMT <img src="http://www.guytronix.com/images/499_p7250003_Jul25_1006AM.JPG"> <br> <font face="Times New Roman,Times,Serif"><font size="4"><font face="Times New Roman,Times,Serif"><font editor_id="mce_editor_0" face="Times New Roman,Times,Serif" size="4"><font face="Arial" size="2">Featured&nbsp;above are&nbsp;working builds of the 8 Watt Ardmore and 1/2&nbsp;Watt Gilmore Jr Kits designed by Gerhart&nbsp;Amplification tone wizard, Gary Gerhart.&nbsp; Everything is included except solder (use 60/40 rosin core solder, no flux).&nbsp; The&nbsp;chassis&nbsp;are finished&nbsp;for the Customer with all holes&nbsp;being drilled and punched.&nbsp; Note the stainless steel PEM nuts press fitted into the chassis for a solid, quality build.&nbsp; Kits&nbsp;feature a&nbsp;Mil-Std&nbsp;black anodize chassis, Mercury Magnetics&nbsp;power transformers, Gerhart Amplification's p<span style="font-family: 'times new roman'; font-size: 13.5pt;">roprietary output tr</span>ansformers manufactured by Mercury Magnetics and all stainless steel chassis hardware.&nbsp; The assembly manual guides the builder through each step.&nbsp; The Gilmore Jr&nbsp;or Ardmore Kit&nbsp;are an excellent choice for those who are building for the first time, yet challenging enough for those who have built kits&nbsp;before.&nbsp; Guytronix stands poised and ready to assist the builder throughout the assembly&nbsp;process. <br> <br> Click here for more details.<a href="http://www.guytronix.com/"> http://www.guytronix.com/</a></font> <br> </font></font></font></font> <p> </p> Amplifiers;DIY;Guitar Amplifier;Guitar Fx;Tubes;Vacuum Tubes http://www.diy-central.com/Trackback.aspx?guid=d2616dd5-14dd-409e-aed3-6865c996723e http://www.diy-central.com/pingback.aspx http://www.diy-central.com/PermaLink,guid,d2616dd5-14dd-409e-aed3-6865c996723e.aspx DIY-Central.com Administrator DIY-Push-Pull-6V6GT-Tube-Amp.jpg
This 6V6 amp was built following the push-pull (PP) EL84 / 6V6 Dynaco A-410 output transformer schematic. There are a few minor deviations from the original schematics. Instead of Dynaco transformers, Hammond 1608A audio output transformers and a Hammond 272HX power transformer were used. The EL84 / 6V6 PP Dynaco A-410 output transformer schematic showed a 1000 ohm feedback resistor which resulted in bad amplifier oscillation. Feedback resistor Values between about 6 and 10 k-ohm worked well and I settled on 10k. A 5Y3 rectifier would have been to small for a stereo amp so a JJ GZ34 rectifier was used. It became necessary to put a 100 ohm resistor before the first power supply capacitor to bring down the B+ to about 325 volts as I was getting in excess of 345 volts (there is less voltage drop through a GZ34 versus a 5Y3).

Click here for project details. http://diyaudioprojects.com/Schematics/DIY-Push-Pull-PP-6V6-Tube-Amplifier/
Push-Pull Vacuum Tube Amplifier http://www.diy-central.com/PermaLink,guid,d2616dd5-14dd-409e-aed3-6865c996723e.aspx http://www.diy-central.com/PushPullVacuumTubeAmplifier.aspx Sat, 02 Jan 2010 22:31:27 GMT <img src="http://www.diy-central.com/images/DIY-Push-Pull-6V6GT-Tube-Amp.jpg" alt="DIY-Push-Pull-6V6GT-Tube-Amp.jpg" border="0" height="394" width="770"> <br> This 6V6 amp was built following the <a href="http://diyaudioprojects.com/Schematics/Push-Pull-EL84-6BQ5-6V6-6AQ5-Dynaco-A-410-Tube-Amp-Schematic.htm">push-pull (PP) EL84 / 6V6 Dynaco A-410 output transformer schematic</a>. There are a few minor deviations from the original schematics. Instead of Dynaco transformers, Hammond 1608A audio output transformers and a Hammond 272HX power transformer were used. The <a href="http://diyaudioprojects.com/Schematics/Push-Pull-EL84-6BQ5-6V6-6AQ5-Dynaco-A-410-Tube-Amp-Schematic.htm">EL84 / 6V6 PP Dynaco A-410 output transformer schematic</a> showed a 1000 ohm feedback resistor which resulted in bad amplifier oscillation. Feedback resistor Values between about 6 and 10 k-ohm worked well and I settled on 10k. A 5Y3 rectifier would have been to small for a stereo amp so a <a rel="nofollow" target="_blank" href="http://store.yahoo.com/cgi-bin/clink?yhst-8476489043850+k7VCQc+jj-gz34.html">JJ GZ34</a> rectifier was used. It became necessary to put a 100 ohm resistor before the first power supply capacitor to bring down the B+ to about 325 volts as I was getting in excess of 345 volts (there is less voltage drop through a GZ34 versus a 5Y3). <br> <br> Click here for project details. <a href="http://diyaudioprojects.com/Schematics/DIY-Push-Pull-PP-6V6-Tube-Amplifier/">http://diyaudioprojects.com/Schematics/DIY-Push-Pull-PP-6V6-Tube-Amplifier/</a> <br> Amplifiers;Tubes;Vacuum Tubes http://www.diy-central.com/Trackback.aspx?guid=93c9d59a-1c8c-4e17-a2eb-8172d9e952ad http://www.diy-central.com/pingback.aspx http://www.diy-central.com/PermaLink,guid,93c9d59a-1c8c-4e17-a2eb-8172d9e952ad.aspx DIY-Central.com Administrator

DIY'ers today have it good! There's lots of projects available on the net to build. Here's a Tube Amp Kit by OddWatt Audi. 

The manufacturers specifications for the kit are as follows:

  • Rated Power Output: 25 watts (RMS)
  • Input Sensitivity: 1.5V (at rated power)
  • Input Impedance 100 k-ohm
  • Input Terminal: Line Level RCA
  • Speaker Output Taps: 4 and 8 ohms
  • Distortion: less than 0.5% through half power, 1% at full power
  • Frequency Response: 8Hz to 20 kHz +0/-1db at any rated power
  • Signal to Noise Ratio: less than 80dB
  • Tubes: Gold Lion KT88, NOS JAN Philips 5751
  • Supply Voltage: 120VAC 50/60Hz
  • Power Consumption: 130 watts (each monoblock)
  • Weight: 6.3 kg (each monoblock amp)
  • Dimensions: 205 mm (W) X 225 mm (H) X 300 mm (D



http://diyaudioprojects.com/Tubes/5751-KT88-Tube-Amp-Kit/

Vacuum Tube Amp Kit http://www.diy-central.com/PermaLink,guid,93c9d59a-1c8c-4e17-a2eb-8172d9e952ad.aspx http://www.diy-central.com/VacuumTubeAmpKit.aspx Tue, 22 Dec 2009 17:37:06 GMT <img src="http://diyaudioprojects.com/Tubes/5751-KT88-Tube-Amp-Kit/5751-KT88-Push-Pull-Tube-Amp-Kit.jpg"> <br> <br> DIY'ers today have it good! There's lots of projects available on the net to build. Here's a Tube Amp Kit by OddWatt Audi.&nbsp; <p> The manufacturers specifications for the kit are as follows: </p> <ul> <li> Rated Power Output: 25 watts (RMS)</li> <li> Input Sensitivity: 1.5V (at rated power)</li> <li> Input Impedance 100 k-ohm</li> <li> Input Terminal: Line Level RCA</li> <li> Speaker Output Taps: 4 and 8 ohms</li> <li> Distortion: less than 0.5% through half power, 1% at full power</li> <li> Frequency Response: 8Hz to 20 kHz +0/-1db at any rated power</li> <li> Signal to Noise Ratio: less than 80dB</li> <li> Tubes: Gold Lion KT88, NOS JAN Philips 5751</li> <li> Supply Voltage: 120VAC 50/60Hz</li> <li> Power Consumption: 130 watts (each monoblock)</li> <li> Weight: 6.3 kg (each monoblock amp)</li> <li> Dimensions: 205 mm (W) X 225 mm (H) X 300 mm (D</li> </ul> <img src="http://oddwattaudio.com/files/IMG_9673%20%28Small%29.jpg"> <br> <br> <br> <a href="http://diyaudioprojects.com/Tubes/5751-KT88-Tube-Amp-Kit/">http://diyaudioprojects.com/Tubes/5751-KT88-Tube-Amp-Kit/</a> <br> <p> </p> Tubes;Amplifiers