I know your problem, have been relying on finishing-companies (paint, chrome and anodizing) and the lead times are sometimes ridiculous, unfortunately also the quality. Actually they are potential nightmares!
In order to secure quality and lead time, we ended up with an own paint department. The...
My conversation with Lukasz when asking about Visseaux 6n7gt;
My question; Is it possible to use Visseaux 6n7gt when using balanced outputs?
Lukasz answer; Yes.
My reply; Despite the common cathode?
Lukasz reply; OOps, I read 6SN7 not 6N7, in this case - you can not
Anyway, since you are using...
Do you or someone else know FOR SURE if it is possible to use the ecc31 when running balanced between the Horizon and the Amp? According to Lukazs it is not possible with the Visseaux 6n7gt ( ecc31) due to the common cathode which ecc31 has. Somebody running balanced??