24v tube buffer & line stage schematic

[Gost22]

This one works from a 12V battery:

audiofaidate.it

gain 13.7
BW (-1dB) 12Hz .. 250kHz
clipping Vout max 3Vrms on 27Kohm load
THD at 2Vrms 1%, 2nd harmonic only
THD at 1Vrms 0,78%, 2nd harmonic only ( -50dB)
output resistance less than 600ohm

Hi Plovati!
Where the schematics?😕

 

[Gost22]

ecc83

We re-organized all the AUDIOFAIDATE forum, noe we're on www.audiofaidate.org Il sito indipendente degli audiocostruttori.
Please take note of the new link to PREcario low voltage tube preamplifier
New link:

http://www.audiofaidate.org/uploaded/plovati/PREcario_darlitotem_lowres.JPG

Hi plovati!
How can you change the schematic instead with tube ecc86 with replacement ECC83 (12ax7).🙁
In this case, the anode voltage Vcc=+ B = 250V.
Thanks for the help!