Mr. Kung
1- 3.737V
2- 330.8mV
3- 3.822V
4- 292.3mV
5- 126.5V
6- 18.65V
7- 123.9V
8- 19.64V
9- 228.5V
10- 27.52V
11- 1.136V
12- 1.136V
13- -19.64V
14- -9.83V
15- 300V
16- 81.5V
17- .486V
18- .3mV
19- 292.2V
20- 41.18V
21- 293V
22- 41.11V
23- 303.5V
24- 41.9V
25- 318.9V
26- -33.82V
27- -35.5V
28- 6.48v
29- 6.78V
1- 3.737V
2- 330.8mV
3- 3.822V
4- 292.3mV
5- 126.5V
6- 18.65V
7- 123.9V
8- 19.64V
9- 228.5V
10- 27.52V
11- 1.136V
12- 1.136V
13- -19.64V
14- -9.83V
15- 300V
16- 81.5V
17- .486V
18- .3mV
19- 292.2V
20- 41.18V
21- 293V
22- 41.11V
23- 303.5V
24- 41.9V
25- 318.9V
26- -33.82V
27- -35.5V
28- 6.48v
29- 6.78V
Please go to page 19.
RE:test point 16.. you should have 265-290V.
Check the components Q4, ZD2, D2. Once you fix TP#16, you will reslove the issue..
If you want to chat in the phone... Email your phone number to info@vkmusic.ca,
We cat Facetime or Whattaspp
RE:test point 16.. you should have 265-290V.
Check the components Q4, ZD2, D2. Once you fix TP#16, you will reslove the issue..
If you want to chat in the phone... Email your phone number to info@vkmusic.ca,
We cat Facetime or Whattaspp
Hi all,
I am newbie of Elekit family.
I would like to seek your advice of the fuse installed at Unit 8. The stock fuse is 250v 3A slow blow.
Is it applicable in 220-240v region only? Should I change the fuse to different "A" if I use at 110-120v region?
I am newbie of Elekit family.
I would like to seek your advice of the fuse installed at Unit 8. The stock fuse is 250v 3A slow blow.
Is it applicable in 220-240v region only? Should I change the fuse to different "A" if I use at 110-120v region?
The fuse for 230V region should be 1.5A. If you cannot find 1.5A fuse. You can use 2A fuse (slow blow)
Hello, my answer is not for your question,.but
If you use your amp which is built for 250V region I think you must mod your amp's Unit 8 pcb and desolder the socket from CN17 and solder in to CN16 (for 115V region at my TU 8200 R)
I just finished building the TU-8200R and ran some measurements with ARTA. I'm not able to reproduce the spec that says 8W of output power with 6L6GC in UL mode. Even in Pentode mode, I can barely reach it.
Has anyone else experienced this?
I've noticed that clipping can be observed on pins 7/8, so this is happening even before the power stage.
Has anyone else experienced this?
I've noticed that clipping can be observed on pins 7/8, so this is happening even before the power stage.
Yes, all my DC check points are perfect according to the table (they fall somewhere in the middle of the range for each point)
The spec doesn't say what % THD the max power is referring to. But in my case, I couldn't exceed ~7.5V into 8 ohms which is about 7W (with well over 10% THD) in Pentode
The spec doesn't say what % THD the max power is referring to. But in my case, I couldn't exceed ~7.5V into 8 ohms which is about 7W (with well over 10% THD) in Pentode
Hi Guys,
I have now had the 8200R for a few months, a wonderful amp indeed. I have now ordered Lundahls and Mundorf cap upgrades. Now, I use it as a power amp only and would like to bypass the volume pot. Can anyone please point what and how to do it. I am not handy so will engage a technician to do it while upgrading the caps. Thanks
I have now had the 8200R for a few months, a wonderful amp indeed. I have now ordered Lundahls and Mundorf cap upgrades. Now, I use it as a power amp only and would like to bypass the volume pot. Can anyone please point what and how to do it. I am not handy so will engage a technician to do it while upgrading the caps. Thanks
You'll probably hear from Victor on this, but I don't think bypassing the volume pot is worth the trouble. I doubt the pot adds significant noise or distortion.
The 8200R is a great amp. It’s my 2nd favorite to the TU8900. I noticed a HUUGE improvement with the lundahl transformer upgrade from victor, Along with the caps upgrade. In my opinion , the TU8500 preamp really enhances the sound as well.
-Matt
-Matt
I don't know what ARTA is, but what was the resolution to this? Were you able to get to 8W? Was it just a matter of input voltage?
In my tests (see earlier mid-2023 posts in this thread) distortion got absolutely horrible before reaching those power levels, so I never tried going there. I think also my test resistors wouldn't have allowed it.
Hi folks! I have very vital question about TU8200R - can I connect speakers with lowest impedance 2 ohm (occuring between 50-300Hz) to it? Average impedance for higher frequencies varies from 4 to 8 ohms). Speakers are very effective (96dB) and I am not listening over 40-50% of power (12 o'clock on volume knob)...
Folks, I’m concerned about this volume control, the upgrade Alps27 pot installed with the chopped PCB. I show continuity between all solder joints on the right side. The left side is fine. I’m afraid I’ve damaged the board when I separated it. Does anybody have anything to offer? Many thanks. Looking forward to finishing this kit.
