diyAudio (
-   Tubes / Valves (
-   -   Audioromy FU13 (813) diagram and mods (

trondareo 28th February 2009 04:52 AM

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.

Koifarm 28th February 2009 09:25 AM

Look here:

trondareo 28th February 2009 02:49 PM

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.

revintage 28th February 2009 03:32 PM

Is your amp with 6V6 or ECC82 drivers?

Koifarm 1st March 2009 11:30 AM

Mine has 6n6p drivers;) , of course.

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.

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.

revintage 1st March 2009 11:58 AM

The unlinear ECC82 should be a total disaster so your mod must have done lots!

Cobra2 1st March 2009 12:14 PM

I have one too...
I tried 12BH7 instead of the 12AU7, an improvement.
But should really re-build the driver completely...

Arne K

Koifarm 1st March 2009 03:17 PM

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.

andyjevans 2nd March 2009 08:56 AM

I didn't actually see the schematic anywhere - what am I missing here?


revintage 2nd March 2009 11:58 AM

HI Andy,
It is deeply hidden in Koifarms links.......

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

All times are GMT. The time now is 08:38 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 18.75%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio