AOS Exclusive Review of Eco-Fan Sound Pre-Amp and Power Amp

[mantha3]

Jack,

It was nice talking to you yesterday from Minnesota, USA. I'm in the market for the Boost it. I hope Adam still has the 120 volt transformers for the Boost-It that you had wound...

[Reid Malenfant]

Hi Andy, would you mind popping into the welcome area of the forum & introducing yourself please? Perhaps you didn't see that it is required of all new members in the activation email you received....

Thanks in advance

[Jack Williams]

Hi Andy,
Nice to talk with you the other day. Yes, we have 120v transformers. Boost-its in both voltages coming up. Check with Adam on progress. They have one megohm in, and 3500 ohms out with some 12db gain. 6DJ8 valves.
The amps do all have 120/240v changeover.

[mantha3]

Reid,

Sorry I missed the Welcome. I took a moment to say hi and introduce myself. Nice forum

Murray,

I'm a little new to tube audio but enjoying the learning experience. If a source has 2v signal and that 2v signal runs thru the Boost-It having 12 dB gain.. What is the approximate voltage on the signal out?

This is more a curious question... I'm not fully getting gain/dB and I'm wondering if my thought is off that "gain" just means a slightly stronger voltage out. So one question was what the approx voltage would be out if the 2 volt in example were in play?

I have a freind who has a Decware ZSTAGE which is somewhat similar to what you have in the Boost-It.

ZSTAGE -http://www.decware.com/newsite/zstage.html

I like the use to two 6DJ8 over the single 12AU7 and I like the BoostIt not having the volume knob.... I have the passive pre for that.

Question 2
Each channel is driven by a 6DJ8/E88CC. One triode for Impedance buffering and then the next triode section of the same tube for the Gain on a given channel?

Thanks for the time

Andy

[Jack Williams]

Hi Andy,
No you would need the nill gain "Bufferzone" for that. It would then present the player with 1.5 megohms. Otput is 2500 ohms.
The "Boost-it" is for inputs up to about 600mv.
Re other question, yes, that is correct.
Murray.

[Jack Williams]

A bunch of BSEA2A3 and BSEA6A3 amps are being concentrated on at present.

[mantha3]

Jack,

Just checking in... I purchased a BoostIt wired for 120V AC US. I know you have some amps in the works... The excited guy I am thought I'd write to check in.

Thanks,
Andy of Minnesota

[Jack Williams]

Just a distraction. I made some lo-fo music and other videos with my little Canon IXUS70 camera recently and have them on YouTube.
Have a look at MrMdick and enjoy the show!

[mantha3]

Hi,

I am hearing some progress is being made on the Boost It on the way for me. I'm excited to hear it in my system. Learning about the 6DJ8/E88CC/6922 tube family I am really liking the tube. I also am learning more about direct coupled components and like that design over coupling caps.

I hear a newer Boost It chassis is on the horizon... Any photos?

Thanks,
Andy

[Jack Williams]

Hi Andy,
Yes indeed I did see a 115v Boost-it the other day with Mike, so will keep you posted.
Murray.