Search found 312 matches
- 23 May 2013, 20:34
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Spring retainer http://farm8.staticflickr.com/7286/8795115309_85454101e4_c.jpg Back to 560 Ohms : http://farm4.staticflickr.com/3781/8795114051_9e16598982_c.jpg The bias was too high actually, the was loosing definition and power after 10', current going up. I've been fooled once again by really NOS...
- 20 May 2013, 00:53
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
New vid, with my new speaker, a Red Fang 10" :
- 30 Apr 2013, 15:21
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
I fined-tuned the power, the compression at full tilt etc.
Lesson : dropping too much voltage before the screen node is not a good idea for max "clean" power, nor for brightness.
Lesson : dropping too much voltage before the screen node is not a good idea for max "clean" power, nor for brightness.
- 29 Apr 2013, 16:31
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
The 33+33 µf cap is bigger than the 100 µf one, a tight fit ! But with the Pi filter the amp is dead quiet now. http://farm9.staticflickr.com/8256/8693041784_966df68fa1_c.jpg http://farm9.staticflickr.com/8125/8691939701_747e34c143_c.jpg http://farm9.staticflickr.com/8116/8691876811_9f7b5160d2_c.jpg...
- 18 Apr 2013, 13:37
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Consistent tone and brightness all along the pot's travel now, .
- 17 Apr 2013, 13:18
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Put a diode to be sure there's no interaction between cathode an pre when playing full tilt, and played with the grid-stoppers with no difference in sound actually.. http://farm9.staticflickr.com/8103/8657941652_6715a29965_c.jpg Replaced the Fet's grid resistor with a 2,2 Mohms one, to get more brig...
- 16 Apr 2013, 20:41
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
New video : (uploading at the time of writing)
- 15 Apr 2013, 19:10
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
I like it too :) Love the look. http://farm9.staticflickr.com/8545/8652913808_24570b0c43_c.jpg At full tilt, the amp was still a little farty, so i replace the grid stopper from the triode for a bigger one, works. I think it can be made even higher, between 22K and 50K say. On the contrary, maybe i ...
- 15 Apr 2013, 13:17
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Replaced the 600 Ohms with a 570 one (did not have a 560 on hand, best approx i could manage to do), measured the plate voltage, and dissipation is actually about 7,5 watts (huge voltage drop through the OT) http://farm9.staticflickr.com/8529/8648451773_cafa5a65a9_c.jpg I use dampers to maintain the...
- 13 Apr 2013, 16:45
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Best would be :
- 13 Apr 2013, 15:55
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Too much compression from the triode at max gain, hence the higher grid-stopper.
- 11 Apr 2013, 17:32
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
- 11 Apr 2013, 15:38
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Some mods after all: http://farm9.staticflickr.com/8241/8640736422_11a4725ee1_c.jpg Voltage with a Sylvania 6BM8, was high on the plate of the triode with 180K, so i came back to a 220 K resistor for a more centered bias. Plate dissipation about 7,5 watts. http://farm9.staticflickr.com/8243/86396464...
- 10 Apr 2013, 19:00
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Final schemo :
- 09 Apr 2013, 17:17
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Optimized a lot of things, and it comes to an end.
- 08 Apr 2013, 09:59
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Indeed, i think i will dump the back, it's useless to me
Usually there is a few tubes lying in it, i think i should find a trick to secure them and leave them here all the time.
Usually there is a few tubes lying in it, i think i should find a trick to secure them and leave them here all the time.
- 07 Apr 2013, 21:18
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Short video :
- 05 Apr 2013, 16:52
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
Used 1M resistors in, place of 1 Kohms...it was not working obviously.
Actual voltages today.
Actual voltages today.
- 05 Apr 2013, 14:49
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
The new pre :
- 05 Apr 2013, 12:43
- Forum: Amplifiers
- Topic: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
- Replies: 118
- Views: 60592
Re: A 3 watts KISS amp / single tube ECL82/6BM8/6F3P
One booster/overdrive i like really is the modified DOD250 : just replace the tiny 1nf filtering cap at the output with a 10 nf one, and you end with a great blues and rock pedal, touch-sensitive and natural sounding. You MUST use a true LM741 though, it's part of the reduction in bandpass as the ga...