Avalon 747 technical schematic

[pierre245]

Without load

Did you find the 6 V and 12 V as well as the bipolar 32 V?

Without load I get
- 6.3
-12.1
- 35/-35
And the other B+, 100 volts.

I have 35 not 32 .... Is it a problème ? Thanks

 

[pucho812]

Without load

Without load I get
- 6.3
-12.1
- 35/-35
And the other B+, 100 volts.

I have 35 not 32 .... Is it a problème ? Thanks

Without load, no that’s within spec

 

[pierre245]

Yesterday, I check the 250V caps. Guess what ?? Two Of them are so dry, they collapse only slowly when manipulate them. Its the 47 uf and the 100 uf. I change that 47 uf, now line is on 125 V... Waiting for others caps. I order it and received it today. I will finish recap tonight .. Hope that Can help the 747 to boot on correctly...

 

[pierre245]

Everything’s seems OK NOW ! PSU OK ! Compressor runs… Does it have some audio process (bias, calibrating) to do for optimize the gear ? I remember have some issue with some compressor who needs only some ajustements. Is there a process to do ? Thanks

 

[pucho812]

Everything’s seems OK NOW ! PSU OK ! Compressor runs… Does it have some audio process (bias, calibrating) to do for optimize the gear ? I remember have some issue with some compressor who needs only some ajustements. Is there a process to do ? Thanks

So your compressor is working?
This is good news.
Do you need calibration instructions? I have those.

 

[pierre245]

So your compressor is working?
This is good news.
Do you need calibration instructions? I have those.

Yeah ! 747 works ok now .... 180 line was off : I change only 2caps , 47uf and 1000uf on 250V. Yes I need these instructions for calibrage. If you have something it could help a lot .... Thanks Peter