Gtlab Forum
Тематический => Гитарные усилители и примочки => Тема начата: armkon от Апреля 15, 2014, 04:01:01 pm
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Hello, sorry for english toppic but i have a problem. I see a lot of smart guys in here so i think that i will ask for something.
I have design a little PA 1W or something like this. It will be powered by nixie PSU.
It will use normal input stage then cathodyne on 1 ecc83 tube and signal will be outputed from ecc82 tube thru transformer.
It will be used to connect external preamp and 9v eq betwean it and PA. I think that ecc82 tube will be drived with good signal streanght that will be loose on eq and will go up on that first stage...
Or it's bad idea?
(https://guitartonelab.ru/proxy.php?request=http%3A%2F%2Fs28.postimg.org%2Fnwvo4pov1%2Fimage.jpg&hash=30f1989e0d0921a245986325d3c33b448de3a4c7)
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Ёмана! упражняемся в буржуйском )
@ armkon
Put here what type preamp(or scheme) you want to use, and type Eq(or scheme) for full image of your plan. I think it's would be better to understand your question for people here.
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Seems to me , the idea is quite strange. Why did you take a decision to use this 1watt PA . Do you need to have output signal to be distorted ( like guitar amp sounding ) or clean ? Your schematic diagram has the error . Feedback resistor R11 must to be connected to point R1-C1-R7.
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И не надо на сетках и катодах выходных ламп писать 300V.
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IT must act like normal guitar amp. preamp will be higain something engl like, i want to use it for playing at house. As Post EQ i want to use MXR EQ.
(https://guitartonelab.ru/proxy.php?request=http%3A%2F%2Fs21.postimg.org%2Ftgzu93j7r%2Fimage.jpg&hash=8e68dd2b732bcafdb21fa6e5d1fd3cbd4d2aca33)
Sorry for my mistake with that 300V...
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Triod in PP output stage is not for guitar good sounding amps. The sound will be dull and rigid. Pls, look here
http://www.liegamp.com/pdf/stimer.pdf
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I agree with you that push pull small signal triode based amp is not a good idea but single ended pentode or triode design is even worse.
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So what is better idea ? Then push pull as poweramp for playing at home with good sound quality?
I can build a TBA820 amp like in engl e530.
Waiting for your sugesions ;D
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My advice is get some 6П30Б or 6П30Б-Р subminiature pentodes from ebay or elsewhere and make a regular push-pull class AB power amp as are most of the guitar amps. Depending on the anode voltage you'll be able to get somewhere between 2 and 6 Watts RMS before clipping.
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I agree with you that push pull small signal triode based amp is not a good idea but single ended pentode or triode design is even worse.
http://vk.com/gtlab
The samples are here. SE amp , 2,2 watts . This amp
http://vk.com/albums183961254?z=photo183961254_305267337%2Fphotos183961254
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[/quote]
http://vk.com/gtlab
The samples are here. SE amp , 2,2 watts
[/quote]
i don't see anything when i going in to this page
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In audio (аудиозаписи) , song BB stars-slow and the next (below)
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ФёдорЫч, тем кто не присутствует в контакте не посмотреть, я например не нашел.
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А я не умею по другому :( :( Только через "В Контакте"
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Вот здесь почитай
http://forum.gtlab.net/cgi-bin/yabb2/YaBB.pl?num=1293607985/0
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I can to send samples to e-mail address. If you want.
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I have send you PM, waiting :)
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What do you think? It's worth to try? How to make this PA better then in is in this configuration ? ::)
PA like fireflywork good for me, i know it's not the best think that i can make but it's ok and better then making an ic based pa...
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A little layout for this push pull amp:
(https://guitartonelab.ru/proxy.php?request=http%3A%2F%2Fs28.postimg.org%2Fhp7i7df99%2Fpa_layout.jpg&hash=2810f66105c1cf647405dfd02c043f21e7480800)
Don't look at input tracks.
If anyone can check it please any help will be welcome :) ;)
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armkon, try to check this schematic of the power amp, I think it's better solution for the guitar sound.
http://forum.guitarplayer.ru/index.php?topic=253490.msg7372516#msg7372516
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Напомню что есть ещё серийный комбо гаврош от Ерасова. Возможно его схема также будет полезна. Она есть на сайте.