New 300B pre-amp?

[Doc B]

We just got the high grade switches in to try today. Looks like they will require an adapter to mount them, so the release of the attenuator may follow the shipment of the preamp kits by a bit while we work out the details.

 

[Chris]

Wow, superb stuff from all of you!! My question was answered in spades... and dbishopbliss' comment for me says it all... If LDRs were that great and worth using, Paul and  Doc would have recommended them... Thank you guys...

 

[intojazz]

Any update on the attenuator upgrade?

 

[4krow]

There are different configurations for the fine/coarse controls that I have seen. Right now, I am using a mono (two controls per channel), but I have yet to try one that adjusts volume normally,both channels at once-coarse, and then one fine tune volume, per channel. What type might you be using?

 

[Doc B]

The plan was to work on the prototype today, however we have a very large order of finished amps that needs to be completed a couple days before we had anticipated. Hope to get to the attenuator by Friday. It is stereo, both coarse and fine.

 

[4krow]

Ahhh, Yet another combination. Sounds practical to me. The two mono coarse/fine adjustments per channel is a bit much unless you are using it to set volume from say, a buffer amp to an integrated amp. That is how I am using mine, but it would drive crazier with that much on a pre-amp. The beauty of the arrangement is that there are many more volume positions possible with the c/f setup than a typical 12 step attenuator.

 

[Doc B]

Yes, there are 36 steps. Steps are 1.5 dB apart.

 

[islanddave]

Does the new Bee Pre use a solid state power supply?

Dave

 

[Doc B]

The power supply is solid state. The high voltage shunt regulator is a tube/SS hybrid, using an EL84. The filament supply regulator is SS, and uses a special "noise shunt" circuit that PB and PJ cooked up.

 

[islanddave]

Was the previous incarnate the foreplay was it...........was that a solid state power supply too?

Thanks Dave

 

[Doc B]

Yes, all of our amps and preamps have solid state power supplies. One of the issues in getting a tube circuit to sound good is getting the bass to be tight and punchy. A good SS supply can help a lot in getting there. I'm sure you can find people who will dispute this. Lucky for me I don't have to listen to them.

 

[4krow]

Yes, all of our amps and preamps have solid state power supplies. One of the issues in getting a tube circuit to sound good is getting the bass to be tight and punchy. A good SS supply can help a lot in getting there. I'm sure you can find people who will dispute this. Lucky for me I don't have to listen to them.

Hah Hah  EXACTLY,  thank you!