JoaMat

Happy Birthday!

This is my modified T2 that I’ve in our summer cottage. She has been kind to me for a long time. But lately there has been some funny (not so funny) disturbing sound. So I brought her home for surgery. Didn’t know where to start but when checking the small tube holders some of the pin holders were kind of very sloppy. Anyhow, I swapped small tubes and then she has played excellent - no disturbing noise. Next step will be to desolder tube holders and check/adjust their pins. Tube holders are Teflon type with golden pins with Chinese quality. Need to be checked and adjusted.

Thanks for info. I think I’m abandoning the idea of building an ordinary (through hole components) PSU now. Excellent achievements, Kerry.

I guess it’s R13 that sets the current. Which resistance do use and what current do you get?

Recovering in sick bed today. Digging around in Tidal with Roon. Found this.

Oh no - it’s just short stop along the road…

The original DIY T2 I just finished sounds outstanding . Now, I don’t want to compare the mini T2 with The Famuos DIY T2 - which I believe is the ultimate electrostatic amplifier a DIYer can build. But I’m very happy with the outcome of the mini T2. All heaters are AC.

Half a year ago I promised to build a new original DIY T2. Now it’s done. After some difficulties with left channel and PSU she is playing as an original DIY T2 does!!! Thinking of retire and feeding ducks. No more modifications to an amplifier that can’t be improved. …never trust an addict

Nice! Have been thinking about the selector for a while… now I think I know its purpose.

Happy Birthday, Birgir!

Happy Birthday!

Happy Birthday, Kerry!

or 4093 - used by Stax, Kerry and myself.

Thanks for feedback. Those diaphragms in the picture were much more stretched then the previous I‘ve made. Seems I’ve to keep on trying to make diaphragms with the right tension.

I’ve retested and I got about the same results. Also tested a pair of SR-007 mk2 and then I got graphs more like your Orpheus Clone and 007mk1. I’m very satisfied with the bass, well not as good as 009S but good for my DIY headphone. I’ve tried different diaphragms and some of them are terrible, but I actually manage to do some better. Another thing is that my home made phones are not as sensitive as Stax and the diaphragms need time to charge. They start soft and after half an hour or so the sound reach it’s max. Here is how I stretch the Mylar film. 12 inch inner tube and Scotch Magic tape.