Anyone using Gyraf G14? (bias tubes?)

[dakiniz]

Hello,

I've been using Gyraf G14 EQ.
Recently, I swapped the tubes(two E88CCs), and there is about 0.6dB difference between L and R Level.
It's very annoying.
There's no bias trimmer inside.

Is there a good solution?

I've reached Gyraf but they seem to be busy. no replay at all.

 

[gyraf]

Sorry about that, we're working like mad these days to get things back on track with Gyraf.

For G14 we usually select tubes to match gain. On newer serial numbers (later than #255?) there are gain trimmers halfway hidden between ribbon cables on frontpanel pcb, behind the gain/trim pot. Only trim one side, the lowest-gain side - leave the other at lowest gain.

Jakob E.

 

[dakiniz]

I couldn't see those ninja trimmers.
Now, L and R are perfectly matched.
Thanks, Jakob.

Anyway, G14 sounds so nice after the tubes were swapped. ;D