Mini-p1 tweaks

[gemby]

I boght few weeks ago litlle nice hong-kong amp. For now it stands in my work room next computer playing mp3-s...in first few days sound was a little bit disapointing, but after week of listening it gets better more and more.....

Here are photos of amp http://gallery.galaksija.org

I am asking if anybody has schematics, and also would like sugestions for moding...

I am planing:
- make relay based input selector (i got few mini siemens 6v relays)
- make discharging circuit for power off
- make power on delay with standby switch
- pull out those ugly blue LED-s in sockets of 12AX7-s
- replace block condensators in signal path with beter ones (sugestions?)
- replace electrolits in power suply (sugestions, values?)
- make snubber circuit and replace diodes in greatz (what tipes, values)
- make ac stabilised circuit for heating 12ax7
- make power stabilizer and beter filtration of voltage for 12ax7
- replace 12ax7 with Ei brand 12ax7
- replace EL34 with JJ brand EL34

Any sugestions for sepakers? Energy RC-10 ?

 

[lineup]

So what is name and number of this amp?

There has got to be some identification plate on backside .... ??

 

[gemby]

Hmm, this is some no name chinese copy of S.E.T.Music El34 amp

 

[Svein_B]

This amp seems to be a variant of the Yarland FV-34Biii
PP triode mode, paraphase driver/phase splitter.

I would suggest as the first mod to remove the BLUE LED's under the driver tubes.

I understand that the paraphase phase splitter may need adjusments of the blue trimmer pots when rolling tubes.
I have been thinking about modifying a similar amp to LTP driver stage with CCS, but as long as the sound is good ...

Svein.

 

[gemby]

Yep, blue LED-s are going out first 🙂