Aleph P1.7 question

AndrejM · 24th January 2005, 09:28 PM

Hello!

First I would like to thank all of you, for sharing your knowledge, especially The One And Only. By reading your posts and articles I was able to learn enough to put together an Aleph 5 and Aleph P. At first turn on there were no problems, no magic smoke, only music, and what a beautiful music.

The Aleph P channels are from version 1.7 with only the following modifications:
- gain potentiometers replaced by 200 ohm resistors
- transistors BC 161/16 instead of ZTX 550

The only remaining problem is that when the switches SW1.2 and SW1.1 are closed, shorting the input 10k (R5, R6) resistors for higher gain, the sound is very distorted. The sound is similar to a bad reception of a radio station. The other gain settings are OK. The gain switch is on the back of the case. The trouble could be in the 200 ohm being too low or the switch being to far away. In the future I will do some other minor changes, so any ideas or suggestions to fix the problem are welcome.

I will try to post some pictures (not of very good quality)

Andrej

Stabist · 24th January 2005, 09:53 PM

Hi!

Great to see another guy from SLO here - I also intend to do A5/AP combination eventuelly

Send me please your email adress so we can discuss it more in slovenian language...

Stabist · 24th January 2005, 10:43 PM

Btw - how come there are only 8 Wimas - where are 8 more? Or is it "double decker" design??

AndrejM · 24th January 2005, 10:46 PM

front

AndrejM · 24th January 2005, 10:46 PM

rear

AndrejM · 24th January 2005, 10:46 PM

Aleph 5 top

AndrejM · 24th January 2005, 10:46 PM

Aleph 5 back

AndrejM · 24th January 2005, 10:46 PM

Aleph 5 + Aleph P

jleaman · 24th January 2005, 10:58 PM

looking nice. That just pushed me to finnish my Aleph P1.7. What are your terminals for on teh back a external power-supply ? How you liking the sound ?

Stabist · 24th January 2005, 10:59 PM

Wua - I like it - as far as I see - A5 is completely custom made chassis from A LOT of plates ...

What about heat dissipation - is that solution very efficient?

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24th January 2005, 09:53 PM	#2
Stabist diyAudio Member Join Date: Sep 2002 Location: Slovenia	Hi! Great to see another guy from SLO here - I also intend to do A5/AP combination eventuelly Send me please your email adress so we can discuss it more in slovenian language...

24th January 2005, 10:43 PM	#3
Stabist diyAudio Member Join Date: Sep 2002 Location: Slovenia	Btw - how come there are only 8 Wimas - where are 8 more? Or is it "double decker" design??

24th January 2005, 10:58 PM	#9
jleaman Banned Join Date: Apr 2002	looking nice. That just pushed me to finnish my Aleph P1.7. What are your terminals for on teh back a external power-supply ? How you liking the sound ?

24th January 2005, 10:59 PM	#10
Stabist diyAudio Member Join Date: Sep 2002 Location: Slovenia	Wua - I like it - as far as I see - A5 is completely custom made chassis from A LOT of plates ... What about heat dissipation - is that solution very efficient?