10k RIAA again :)

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DrM

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10k RIAA again :)
« on: 21 Jun 2003, 01:19 am »
Hi John,
   Hate to be a pest, but Thorsten has been spreading some rumors that the 10k unit might not happen, because S&B is pretty busy. True, or hopefully not true? I'm happy to wait for the 10k, as long as it will come.

Thanks!

Dan

John Chapman

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10k RIAA again :)
« Reply #1 on: 21 Jun 2003, 02:01 am »
Hello!

You are never a pest! It's me that should feel bad because this 10K version has taken so long!

T's comment is news to me. I know Jonathan has been rather busy lately but I would be surprised if he does not do the 10K. He was pretty far along on it and it would not take much effort to finish it now. I will call Monday morning and get the latest scoop.

Many Thanks!

John Chapman
www.bentaudio.com

DrM

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10k RIAA again :)
« Reply #2 on: 21 Jun 2003, 03:21 am »
Hi John,
  Here's T's comment

http://www.audioasylum.com/forums/DIYHiFi/messages/1240.html

I certainly hope he is far along and doesn't give up!


My new preamp design is coming along. It will be all DHT (using European tubes), showing off the S&B stepup, TVC, and LCR RIAA! Here's a block diagram



John Chapman

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10k RIAA again :)
« Reply #3 on: 21 Jun 2003, 04:05 pm »
Hello!

WoW! That's quite a system you are building!! Which parts are done and running? Also curious about the Oris 150 Ref bass. I am familliar with the Oris horns as about the time they came out I had made some similar horns myself for use with REP's drivers and TAD 1601C's down below. - what kind of animal is the Ref. Bass?

Thanks also for the link to T's post - as usual lots of really good info from him!

I will report back on Monday.

Many Thanks!

John Chapman
www.bentaudio.com

DrM

  • Jr. Member
  • Posts: 13
10k RIAA again :)
« Reply #4 on: 21 Jun 2003, 08:21 pm »
Hi John,
  Thanks, think big, that's my motto. :) I've been building up to this for years, first with the Oris horns and many DIY amps and preamps, now with Bert's "Reference System", which consists of the Oris 200, and the reference bass (more on that later).

   The 10 amp is done and playing, has been for a few months. Battery filaments and remote power supply. The preamp is done, except the present incarnation is a RIAA of my own devising, and uses 6ER5 tubes and active CCS loading. I have a new internal plate (all the tubes in the phono are internal to the signal chassis), I just need to wire it up with the Aa's, and I need the 10k S&B LCR RIAA.

   I have all the parts and the chassis are ready for the bass amp. The circuit is similiar to a friends amp, who already has finished it, and it sounds magnificent, so no suprises expected there. So electrically, I'm really waiting on the preamp (and I still need some design in the filtering section)

   Bert's "reference bass" is his new design. Details are a bit scant, he's still working on it, but it uses 4 of his new 15" custom drivers, and will be front loaded with a Oris 150 style horn. Efficiency for two units (L&R), will be 100dB, for 4 total will be 103dB.

  Try over at his forums and website for a picture of the bass unit.


Dan

John Chapman

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10k RIAA again :)
« Reply #5 on: 23 Jun 2003, 01:06 pm »
Hello!

Just spoke to S&B. 10K RIAA will happen for sure. Jonathan was far behind on OEM orders and feeling a bit overwealmed last time he spoke to T. Finally he has just about caught up and will be into making the units the middle of July or so. Should see delivery in July. Sorry again for all the delays! I'll keep tabs on progress and post updates here as I get them.

Many Thanks!

John Chapman
www.bentaudio.com