folkeb, i also intend to use a RelVol3 1K on the output, but what i do not understand is were to turn on to increase or decrease the volume. There is no potmeter or dact on the RelVol3. So i.m.o. there must be something to connect on the RelVol3.
Can you please inform me how you do this? Is, for example, a 4-deck potmeter connectable on the RelVol3?
Can you please inform me how you do this? Is, for example, a 4-deck potmeter connectable on the RelVol3?
I haven't tried it, but you need a controller to use the relvol3. I will go for the controller 2 and the front panel 2. This will give me some sort of pot to adjust volume and enables me the use of the input 2 board.
hope this helps some...
F
hope this helps some...
F
He Guys, thanks for the answer, I will try it on the output, with an aleph 5 as power amplifier. Grtz teake.
Has anyone tried using/listen to old stock russian paper caps in their preamp? I've seen KMJ pictures, but I'm curious of how the caps sound.
Best regards,
F
Best regards,
F
Ok, I'll try to get the pre finished. I am just two potentiometers short in parts but I have a lot och sawing to do to mount all sockets. I'll try to get it finished ASAP.
KMJ:
Have you any references to other projects where similar caps have been used? I know from experience that NOS tubes from the 50s are very good, and preferable to later tubes.
Also, where can I get hold of panasonic MKPs?
- F
Have you any references to other projects where similar caps have been used? I know from experience that NOS tubes from the 50s are very good, and preferable to later tubes.
Also, where can I get hold of panasonic MKPs?
- F
one valvebased Preamp but you need to read around for yourself since it's a long thread.
Another one regarding PIO
Yet another.
Those are what I found, the forums searchengine is a bit picky and often leaves you without hits.
Another one regarding PIO
Yet another.
Those are what I found, the forums searchengine is a bit picky and often leaves you without hits.
Resistors
I wonder how one can stuff Dale RN60 on the preamp board, they are too big. Could we use RN55 here (1/8W)? Beside Dale, any other recommendation (preferably easy to source in US)? Thanks for your advice.
WC
I wonder how one can stuff Dale RN60 on the preamp board, they are too big. Could we use RN55 here (1/8W)? Beside Dale, any other recommendation (preferably easy to source in US)? Thanks for your advice.
WC
you could always mount the resistors vertically....
http://www.briangt.com/gallery/miniALEPH-prototype/Brian_GT_Mini_Aleph_018_copy
http://www.briangt.com/gallery/miniALEPH-prototype/Brian_GT_Mini_Aleph_018_copy
Hi there!
My Alpeh p1,7 is almost ready. he's running with music, but I can't get some volume, only when I put the attenuator full open. It,s an 10K on the output. Or do I have to run it in for a few days. For the 10uf.s I got solen en chatereau's, and for the output 47uf's I got 30uf Audyncap plus, maybe it has to open. I have an 23 steps attenuator, when I turn it open till step 15, after that I can hear something, and it's getting louder till the end, but not much. So whats the problem maybe? Can somebody tell? GRTZ Teake.
My Alpeh p1,7 is almost ready. he's running with music, but I can't get some volume, only when I put the attenuator full open. It,s an 10K on the output. Or do I have to run it in for a few days. For the 10uf.s I got solen en chatereau's, and for the output 47uf's I got 30uf Audyncap plus, maybe it has to open. I have an 23 steps attenuator, when I turn it open till step 15, after that I can hear something, and it's getting louder till the end, but not much. So whats the problem maybe? Can somebody tell? GRTZ Teake.
I read earlyer in this tread that a good value for an attenuator at the output is 1 K instead of the 10K you use. Try it and you know.
What is the load of your P1.7, a poweramp?
What is the load of your P1.7, a poweramp?
Hi Wim!
on the input a cheap dvd player and the output a audioanalyse B90
Wim, do you know how I calculate the resistor value? I got dale RN55 on them, where can I get them. And could it be that I did some wrong connections. My attenuator is unblanced, I got the out+ and GND on it and the out- I connected to the xlr, than shorted the GND and the out-. It gives a terrible noise when I don,t short them, but only on the right channel. On the left I don;t have them to short. Teake
on the input a cheap dvd player and the output a audioanalyse B90
Wim, do you know how I calculate the resistor value? I got dale RN55 on them, where can I get them. And could it be that I did some wrong connections. My attenuator is unblanced, I got the out+ and GND on it and the out- I connected to the xlr, than shorted the GND and the out-. It gives a terrible noise when I don,t short them, but only on the right channel. On the left I don;t have them to short. Teake
For what i know, if using the P1.7 as an unbalanced amp, the "hot wire from your CD-player has to be connected to the + on the board, and the "cold" wire from your CD-player has to be connected to the GND on the board. Then you short the - and the GND on your board.
At the outputside it is another story: the + from your board is the input for your attenuator, the center pin of your attenuator goes to the "hot" wire of youe poweramp, and the GND of your board goes to the third pin of your attenuator.
So, no shorts has to be made on the outputside of your board.
Hop you understand it.
You can also read something about it on www.audiostereo.pl/zalaczniki/594496_1.gif
Hope it works!
At the outputside it is another story: the + from your board is the input for your attenuator, the center pin of your attenuator goes to the "hot" wire of youe poweramp, and the GND of your board goes to the third pin of your attenuator.
So, no shorts has to be made on the outputside of your board.
Hop you understand it.
You can also read something about it on www.audiostereo.pl/zalaczniki/594496_1.gif
Hope it works!
Hi again!
When I put my p1.7 off the power with the dvd player and amplifier connected still playing, there comes music out of the speakers, and it's louder than when I put my pre on. When I put my pre on it's buzzing, and when I turn the attenuator the buzzing is getting louder. When I connect 2 cables from star ground to the 2 groundconnectors on the attenuator there is some music at full volume, when I turn it down the music after 8 steps is gone. is it possible that the musicsignal goes to starground? Because the buzzing is getting louder when I turn the attenuator I'm thinking that my attenuator will work, but I don't know how I will get that far. Teake
When I put my p1.7 off the power with the dvd player and amplifier connected still playing, there comes music out of the speakers, and it's louder than when I put my pre on. When I put my pre on it's buzzing, and when I turn the attenuator the buzzing is getting louder. When I connect 2 cables from star ground to the 2 groundconnectors on the attenuator there is some music at full volume, when I turn it down the music after 8 steps is gone. is it possible that the musicsignal goes to starground? Because the buzzing is getting louder when I turn the attenuator I'm thinking that my attenuator will work, but I don't know how I will get that far. Teake
Hi Taeke...
First steps first...
- Are your supply voltages OK?
- Did you measure the DC values at the various points?
- Are the voltages on either side of the ballanced half about equal?
- Did you connect the - input to ground?
Test to check the attenuator:
Take out the active circuit and connect the input directly to the attenuator. Connect the output also to the attenuator. If you can control the volume normally, the attenuator is build correctly.
To check the active circuit:
Download a scoop program from internet for use with the soundcard. Connect the input of the soundcard to the output. touch the + input with your finger and see if you have a 50Hz signal at both - and + output caps.
If this all fails...Give me a call...You know my number.
First steps first...
- Are your supply voltages OK?
- Did you measure the DC values at the various points?
- Are the voltages on either side of the ballanced half about equal?
- Did you connect the - input to ground?
Test to check the attenuator:
Take out the active circuit and connect the input directly to the attenuator. Connect the output also to the attenuator. If you can control the volume normally, the attenuator is build correctly.
To check the active circuit:
Download a scoop program from internet for use with the soundcard. Connect the input of the soundcard to the output. touch the + input with your finger and see if you have a 50Hz signal at both - and + output caps.
If this all fails...Give me a call...You know my number.
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