Audioromy FU13 (813) diagram and mods - diyAudio
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Old 28th February 2009, 05:52 AM   #1
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Default Audioromy FU13 (813) diagram and mods

I took the plunge recently and bought an Audioromy FU13 amp of leshele (on9mart) on ebay. The amp arrived on schedule in well padded boxes an plays wonderful music.

So now I am wondering if anyone has a circuit diagram of the amp and experience with bias adjustment or any interesting mods.
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Old 28th February 2009, 03:49 PM   #3
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Wow - Great!

I have surfed past Rören und Hören previously but obviously not found the right threads. There is lots of stuff there. In Norway there is a lot of interest in the Music Angel KT88, but it seems Germany is the place to go for Audioromy.

However, I see that I will have to brush up on my school german as google translate looses about half of the meaning.
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Old 28th February 2009, 04:32 PM   #4
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Is your amp with 6V6 or ECC82 drivers?
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Old 1st March 2009, 12:30 PM   #5
Koifarm is offline Koifarm  Netherlands
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Mine has 6n6p drivers , of course.

Click the image to open in full size.

Below the parts i have replaced until yet.

- Volumepotmeter. After 2 months it started to crack, replaced with Alps 100k LOG 2 channel potmeter.

- 47uf/40 V Capacitor to control on/off relais.

Click the image to open in full size.

If this one is defect, the relais switch at 100hz and the fuse is blown.

- Rectifier tube was defect after 4 months, changed for another.

- Changed 6DJ8 tubes for JJ E88CC goldpin.

- Changed ECC82 for 6N6P. Must modify the heater powersupply.

The last two modifications are to change sound and this is very personal.
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Old 1st March 2009, 12:58 PM   #6
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Koifarm,
The unlinear ECC82 should be a total disaster so your mod must have done lots!
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Old 1st March 2009, 01:14 PM   #7
Cobra2 is offline Cobra2  Norway
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I have one too...
I tried 12BH7 instead of the 12AU7, an improvement.
But should really re-build the driver completely...

Arne K
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Old 1st March 2009, 04:17 PM   #8
Koifarm is offline Koifarm  Netherlands
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Arne, you can try the JJ ECC99 this gives a better driver. You do not have to change anything. The ECC99 needs some more heater current but that is no problem for the amp.
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Old 2nd March 2009, 09:56 AM   #9
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I didn't actually see the schematic anywhere - what am I missing here?

andy
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Old 2nd March 2009, 12:58 PM   #10
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HI Andy,
It is deeply hidden in Koifarms links.......

Don´t think you will be impressed when you find it, though!
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