SvenMZ8 0 Report post Posted June 29, 2010 im assuming HO means "headphone out"? u need to be more clear. it still works. i have the blackgates, pm if u want them. Share this post Link to post Share on other sites
SvenMZ8 0 Report post Posted August 10, 2010 Balanced Amp completed -Converts unbalanced signal to balanced -9V rechargable battery with charging circuit -Black and white Faceplate Balanced Audio Technica FC-700 to go with the new amp With imod + sonicaps Share this post Link to post Share on other sites
domm123 0 Report post Posted October 10, 2010 (edited) Hi, can i know where you get your 3.5mm socket from? and do you know any places in singapore that sells chloroform? Thanks Edited October 10, 2010 by domm123 Share this post Link to post Share on other sites
SvenMZ8 0 Report post Posted June 12, 2011 changes to tube amp. simple yaha on 15v Share this post Link to post Share on other sites
jmwreck 0 Report post Posted August 20, 2011 (edited) great tubes, hope you can make O2 Edited August 23, 2011 by jmwreck Share this post Link to post Share on other sites
d4rkm4st3r 0 Report post Posted October 23, 2011 Amazing work.. Btw, I tried using a no cap LOD on my diymod but nothing really happen.. I connected it to a cmoy amp.. Izzit bcos the caps in the cmoy blocked the voltage? Share this post Link to post Share on other sites
p e t e r.. 0 Report post Posted October 23, 2011 (edited) Hi~ May i know what is ur setup on Soniccap? how to connect 4.7uF and 0.1uF? whether is just join 2 together end to end? 4.7uF positive + 0.1uf positive & 4.7uF negative + 0.1uF negative? Edited October 24, 2011 by p e t e r.. Share this post Link to post Share on other sites
SvenMZ8 0 Report post Posted November 4, 2011 @d4rkm4st3r yes Share this post Link to post Share on other sites
SvenMZ8 0 Report post Posted January 28, 2013 (edited) Designed another amplifier after taking apart my Pimeta amplifier. This time its a Pimeta without the use of virtual ground, thus its a two channel amplifier. A real dual supply, + and - voltages and a true ground is used. The merits of using such a design is covered here by NwAvGuy http://nwavguy.blogspot.sg/2011/05/virtual...annel-amps.html The negative voltage supply is generated by a charge pump TPS60403, which is a voltage inverter. The power supply is a 3.7V PSP Lithium ion battery, thus with the charge pump, the voltages supplied is +3.7V and -3.6V. To ensure that the performance of the charge pump is not affected by PCB layout, the recommended layout in the datasheet is followed closely. As you can see, the charge pump sits very closely with the ceramic capacitors to reduce parasitic inductance. The audio amplifier section is also similarly made compact to reduce the footprint and size of the amplifier. As the charge pump switching frequency is 250KHz, which is within the bandwidth of most opamps. Thus the chosen audio opamp requires a high PSRR to reject power supply noise generated by the charge pump. The chosen LTC6241HV has a minimum PSRR of 83dB when supplied with +-5V. The input and outputs of the amp is placed above the circuitry to reduce the footprint. The entire amp, including the PSP battery fits inside a hammond 1455C801 aluminium casing. Components Power Supply Section Battery: 3.7V Lithium ion battery Charge pump: TPS60403 Ceramic Capacitors: 1uF X5R 0603 Voltage Rail Capacitors: 220uF/4V Blackgates PK Series Bypass Capacitors: WIMA 0.1uF/63V Audio Amplifier Section Audio Opamp: LTC6241HV, Gain set at 2. Buffers: BUF634U Volume control: Alps Potentiometer 50K LOG Edited January 28, 2013 by SvenMZ8 Share this post Link to post Share on other sites