1W power amp with loadbox for silent recording, 1 Вт усилитель с эмулятором нагрузки

Hello, i thinking about making silient recording kit, thats mean 1W or a little more pa with a RLC type loadbox and speaker sim.

That idea have been used in cream machine preamp from H&K and it sound realy good when recording direct to pc input.

The idea is to build something like that for use with diffrent preamps, because i use rack system for playing.

I thinking about make firefly power amp, maby someone have other sugestions on the power amp to use?

waiting for your idea.

Это сообщение отредактировал armkon - 21.03.2010 - 14:07

Another one way is to use small JFET amplifier loadet on transformer
http://diyfactory.ru/forum/index.php?showtopic=783
http://milas.spb.ru/~kmg/microfetpa_en.html
You can try to use transformer from old battery powered trnsistor radio.

i want to make the poweramp, not intrested in fet because they will dont give me the true tube sound, i will use that with the all tube pre so using it with the fet is nonsens in my opinion...

In this case you can try to use this
http://www.freestompboxes.org/viewtopic.php?f=2&t=7724
or this design
http://www.freestompboxes.org/viewtopic.php?f=2&t=4848

PS About JFETs you not so right, they has curves similar to pentodes so in "power" stage they work similar.


Это сообщение отредактировал KMG - 21.03.2010 - 16:12

hmm i build 3 fets effects, nothing sound like tube, tube is tube The silent recording is not so easy to do for guitar to sound like on normal speaker. That's a little sad but i will fight to make it so close as i can, will tray to build rlc loadbox. RLC sound better then the regular resistor loadbox. If someone want to know something about RLC:

http://www.hexeguitar.com/work-hexeamp_e - the sound sample are recorded by RLC then to speaker sim

http://www.aikenamps.com/spkrload.html - RLC loadbox, the socond is better then first

if someone know Polish language can go to Trioda.pl -> kacik gitarowy for many intresting things (mały bizon is hexeamp thred with schematics), The PzP is owner of hexeguitar.com

oh and one more thing:
in mp3 attachment ther is comparation of Resistor - RLC - Speaker
if someone have idea for the 1W-4W poweramp or schematics of standalone poweramp please plase send them in here

Присоединённый файл ( Кол-во скачиваний: 30 )
 HexeRLCdummyLoad_schem.gif

i can't upload file in here so i place it on wrzuta.pl for all to listen it

http://armkon.wrzuta.pl/audio/4WM9ekIp4Y7/...lc_real_speaker

I told you not about preamps/effects, only about "power" stage.

Tube preamp emulation has some tricks to do.
Some stuff about it you can find there (unfortunately in russian)
http://gtlab.net/gtlab4/archives/216
http://gtlab.net/gtlab4/archives/415
And several articles and projects on my page
http://milas.spb.ru/~kmg/index_en.html

KMG maby you have right, but i can't get this kind transisors in poland that was used in all that constructions. Maby you know any replace transisors for them?