Happen to come across this fine headphone amp. It is using 2 pcs of 6418 tubes. I ordered this K272A amp from ebay and it took a while for the amp to arrive. After a long wait, on 4th June 2010; the amp finally arrived and I was overjoyed to receive it.
On 12th June 2010 saturday morning, I started fixing it up. Upon turning on the amp, I noticed the 6418 tubes started to grow a little. The dim light of the filaments cannot be seen clearly; it has to be in a very dark room inorder to see the grow of the filaments.
Excited moment came…I plugged in the headphone. But, to my disappointment, I noticed pretty loud ‘hiss’ noise. I thought it was due to my soldering faults or connection faults. But, after some query from the forum and understand that it seem to be normal for this amp. Anyway, for me, I noticed that by changing the headphone to a higher impedance does help to ‘reduce’ the hiss noise. So now, I am using the 60 ohms headphone to reduce the hiss nosie. The hiss does not actually disappear; it is still there but the impedance of the headphone just covered the noise up.
Anyway, beside the hiss noise, this can be considered as a fine sounding amp in my opinion. For just about AU30. I think it is a good buy. At the mean time, I am not going to let the hiss problem bother me. I just enjoy the music for now. Cheers!
Posted in Audiophile | No Comments »
Today is the 5th Anniversary of my DIY SunAudio Amplifier which I had build in 2003. This is the very first amp which I had build from ground up. The tubes it uses are 6SN7, 2A3 and 5U4G. It is one of my favourite. Till today, I am still using it. Below are some of the pictures which I had taken during that time. Enjoys.
This article on My SunAudio Amp is brought to you by www.alexteo.com
Posted in Audiophile | 2 Comments »
This was the amp which I have built many years back. However, I will like to introduce it again as it had created many happy moments with my family together.
Remember that time before 1995, I do not have any interest in DIY audio. But, after witnessed a shop displaying an internal layout of a tube amplifier change all that. I became very keen in the layout of such tube amp. Not long after that, around 1996, I decided to build one for myself. After some shopping, I chose Audio Note Kit4 as a starter. Till today, I am very glad that I had picked up this Audio Note’s tube amp as it really sounded good and musical. Until now, it still in my bed room. This amp will be always in my mind as we had very great moment together as a family listening to this amp in our bed room every night before we go to sleep. I really enjoys every moment with it. Thus, I will keep it forever. Cheers!
This article on Audio Note Kit4 is brought to you by www.alexteo.com
Posted in Audiophile | 2 Comments »
As I am very happy with the sounding of the hybrid amp from eBay. I decided to build one from stretch. After few days of surfing the web and finally decided to work on the amp designed by Sijosae. I was inspired by his work just by looking at the pictures of his amps. Anyway, here it goes…
For this amp, I had put in a lot of efforts and time. To date, this is the only amp which I had spend the most time and efforts. The time I spend most was the troubleshooting of the humming noise. I had redo the wiring and re-soldered few times just to get it right. Components had changed from the initial designed. I planned to use the toroidal transformer but due to the “magnetic interference”; which cause noise to the surrounding circuits, I was forced to drop the idea of using the toroidal. I guess I trusted the toroidal so much that I believe it will not cause interference even my circuit is very near to it. Thus, I never take extra precaution while planning the components layout. I was wrong; therefore, I had to replace the toroidal with a Switch Mode Power Supply (SMPS). I know, in the audio world, SMPS is not very popular. Well, I had no choice for now unless I want to redo everything again; such as getting another bigger chassis, change the components layout or solder on PCB … etc. For now, I choose to leave everything as it is and enjoys. Cheers!
This article on DIY Hybrid Amplifier is brought to you by www.alexteo.com
Posted in Audiophile | No Comments »
