Simplistic MosFET HV Shunt Regs

[Salas]

PSU with SSHV2 installed awaiting testing.

Dummy load = 10K/50W.

Are those capacitor bottoms with wires exiting from black blobs belonging to Obbligato film in oil cans?

 

[Salas]

I didn't expected such difference.

Tubes can be very synergistic between them sometimes. Just keep what you like best.

 

[merlin el mago]

If the the same synergy with the #26 tue preamp now I understand why sound so good, thanks Salas for all support & giving the best sound really appreciated.

 

[Salas]

I had listened to very good #26 config with trafo pot and 2 SSHV2, Rod on cathodes, trafo out, the works, at VG's through his nice big horn speakers. It gives that golden tone. Although I could easily say it was a form of DHT coloration when he sent me files directly from vinyl riaa pre or through 26 also that I checked on headphones, in the listening room's acoustic space it was very engaging.

 

[merlin el mago]

I have two trafo pots & two outputs tx, just now I'm wiring the TVC to my Shallco attenuator.

 

[iko]

I had listened to very good #26 config with trafo pot and 2 SSHV2, Rod on cathodes, trafo out, the works, at VG's through his nice big horn speakers. It gives that golden tone. Although I could easily say it was a form of DHT coloration when he sent me files directly from vinyl riaa pre or through 26 also that I checked on headphones, in the listening room's acoustic space it was very engaging.

Just curious, do you have a slight preference for your 6V6 preamp over the 26?

 

[Salas]

I did not have the opportunity to listen to them A/B in the same system. If I am grasping it right the 6V6 one has more fleshed out and neutral tone, the #26 has that illusive DHT touch of golden halo open mid-highs.

 

[Salas]

Someone has to use same TVC, regs, etc. to be fair and listen in the same system of course. The 6V6 can get you to very good level cheaper with less problems to solve and less subsystems is one sure thing. A TKD, or Cosmo 50-100K, 100 Ohm good grid stopper, 7.5K Mills load, 300V clean B+, good capacitor output, and you are there.

 

[merlin el mago]

I will do a look because all people said #26 are very microphonics.

 

[Salas]

6V6 can also be enough. Both need anti vibration mounting.

 

[iko]

Haha, nice! Sounds to me like king and queen; the royal family of preamps! The queen is harder to make happy.

 

[Salas]

Females are never content as always.

 

[merlin el mago]

Is this your last 6V6 preamp schematic?

 

[Salas]

The original one, yes. You can use lighter PSU filter, 7.5K load, 100 Ohm stopper and 300V SSHV2 for a bit more gain and same THD quality.

 

[vgeorge]

In my winter plans, I will make a choke loaded 6V6 with SSHV2 and attenuator at the input, no tvc, just to compare.
Will report then.
Also will try the #26 with starved filaments that was reported to give better results.
For a more monitor sound or less DHT sound you could use Sylvania ST tubes instead of globes that I use.

 

[merlin el mago]

I saved the schematic

 

[Salas]

In my winter plans, I will make a choke loaded 6V6 with SSHV2 and attenuator at the input, no tvc, just to compare.
Will report then.
Also will try the #26 with starved filaments that was reported to give better results.
For a more monitor sound or less DHT sound you could use Sylvania ST tubes instead of globes that I use.

No TVC? Won't be apples to apples.

 

[merlin el mago]

Wich gain have the #26?

 

[merlin el mago]

No TVC? Won't be apples to apples.

+1

 

[vgeorge]

Well, I do not want to dismantle my other pre. Hope will get an idea how it sounds. If I like what I hear will make more tests with TVC.