What is your impression of vintage Telefunken signal tubes ?


12AU7, 12AX7 etc. 

I have not tried them.

inna

@signaforce I had read your posts from 2024 re your selection of the BHK preamplifier.   I also went the same route last week and I’m still very much in the breakin period.  The tubes you referenced above, are those for the BHK?

I was running a stock Freya Plus and found a heavenly match of tubes to go with it.   So far, the Freya Plus is better than the BHK, but the Delta is getting narrower as the stock BHK tubes breakin (about 50 hours so far).

My belief is that I’m going to have to do some tube rolling to take advantage of what the BHK can do.  In terms of the 12 volt options, everyone seems to love the  Brimars which seems like you can agree.

But, I have seen where people comment about switching to the 6 volts (change the jumper configuration), and once they do that, they say "magic" happens and that they’ll never go back to 12 volt.  Have you tried that yet?

The stock Psvanes are minimally acceptable, but a little noisy.  My goal is to try to achieve a better SQ than my Freya configuration...let's see.

I think I’m going to try matched pair of top notch, cryo Electroharmonix 12 volts first since that was one of the matched pair tube brands that was magical in my Freya first, and then will move on to a 6 volt.

 

 

@genomeip Yes, in the BHK pre, my only tubes component.
To be honest, I never considered the 6v alternative. A quick Gemini search yielded the following: ..described by owners as "taking the blanket off the speakers."… It feels more "front row" and panoramic, whereas your 12Vs feel more like "mid-hall."… however… Because they are higher gain, 6V tubes can be noisier… 

Sounds like fun… going to have to buy a pair of 6v tubes. Thanks!

Don’t mean to hijack this thread, but probably going 6v Amperex. Seems like a nice balance between my Tele/Siemens & Brimar’s. Thoughts?
Anyone have experience with the Amperex 7308 USA Gold Pin from Tube Depot? Thanks!