Here is the question: mouser did not send me 22K for IN - input. Can I run amp without it if I do not use balanced input and connect In- to the gnd?
Dodo
put temporary 2 x 10K in series instead
cuttin' resistor from Pa's schematic is usually tough challenge
Thanks ZM! I am not that bad ;-) one local guy asked me to come and help him to fire up his amp. There are no other resistors at his place. That's the thing. I will go and check local radio store tomorrow.
If it was my amp I would try to improvise and probably fire it up without the resistor, but the amp is not mine
If it was my amp I would try to improvise and probably fire it up without the resistor, but the amp is not mine
Setting bias, choosing inputs ?
Hi.
Speaking af inputs, i was wondering the following ::
1. Do i have to short both +IN ans -IN to GND when setting ?, or does it matter at all ?
2. What is the difference of using -IN or +IN and GND for normal RCA inputs ? (I see a C1 cap at -IN, whats the use of that)
// Jesper
Hi.
Speaking af inputs, i was wondering the following ::
1. Do i have to short both +IN ans -IN to GND when setting ?, or does it matter at all ?
2. What is the difference of using -IN or +IN and GND for normal RCA inputs ? (I see a C1 cap at -IN, whats the use of that)
// Jesper
Aleph J fro, scratch part II - Stuffing and testing
Hi..
Please look at direct link to photobucket, as the pictures are getting weird, when linked direct here.
I must say, that i am a little impressed by this amp. I tried to give it 1v/pp ~1000Hz sine, at the input. Looking at the output, it (gains) 8 times the input.
I tried to crank up the inputvoltage, giving it more volts, ended up with the Aleph J clipping at approx. 30-35v/pp
This is excatly what the manual says...
Next part is to listen to it.
// Jesper
Aleph J From Scratch Slideshow by Jesperlykke | Photobucket
Hi..
Please look at direct link to photobucket, as the pictures are getting weird, when linked direct here.
I must say, that i am a little impressed by this amp. I tried to give it 1v/pp ~1000Hz sine, at the input. Looking at the output, it (gains) 8 times the input.
I tried to crank up the inputvoltage, giving it more volts, ended up with the Aleph J clipping at approx. 30-35v/pp
This is excatly what the manual says...
Next part is to listen to it.
// Jesper
Aleph J From Scratch Slideshow by Jesperlykke | Photobucket
The Greens are low on the Idss scale, so not ideal. With a few mods to the circuit they could be made to work, but if they have the Blue, then use those.
Edit - I just saw Zen Mod's post - paralleling greens is a perfectly good idea. You just need more of them.
GR - green
BL - blue
V - violet
That is Toshiba's code for Idss range
Edit - I just saw Zen Mod's post - paralleling greens is a perfectly good idea. You just need more of them.
GR - green
BL - blue
V - violet
That is Toshiba's code for Idss range
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