dannyr wrote:Geek, how does this linestage rate against your other offerings?
Each are different with their own charms.
Though for my own use, I use this one as well as a MooseFET.
Single Tube PAS* Linestage
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Re: Single Tube PAS* Linestage
by Geek » Fri Aug 08, 2014 12:44 am
Each are different with their own charms.
Though for my own use, I use this one as well as a MooseFET.
-= Gregg =-
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
-
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Re: Single Tube PAS* Linestage
by dannyr » Sun Aug 10, 2014 2:01 am
Hi Geek. your MooseFet also looks very interesting. Would a centertapped transformer work with your board? Radio shack has a 25.5v 450ma one for 8bucks. How does the circuit do driving vintage tube amps? Finally any comments on how it sounds compared to the Single tube stage? Thanks again.
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Re: Single Tube PAS* Linestage
by Geek » Sun Aug 10, 2014 12:51 pm
Yes, that transformer will be fine. Even not using the CT and derating the transformer by 0.45, it will supply the current.
Sound.... different. MooseFET sounds very triode-like.... maybe even more tubey than the single tube PAS line stage.
In public, people totally loved it or totally hated it - there was no in-between
The single tube PAS, all responses have been like yours. No one sent one back so far.
MooseFET can drive anything so far... SS amps, tube amps, new and vintage. Even the horrible <2K input-Z of those Parts-Express monoblocks that used to be available for $150.
Cheers!
Sound.... different. MooseFET sounds very triode-like.... maybe even more tubey than the single tube PAS line stage.
In public, people totally loved it or totally hated it - there was no in-between
The single tube PAS, all responses have been like yours. No one sent one back so far.
MooseFET can drive anything so far... SS amps, tube amps, new and vintage. Even the horrible <2K input-Z of those Parts-Express monoblocks that used to be available for $150.
Cheers!
-= Gregg =-
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
-
Geek - KT88
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- Joined: Sun Oct 21, 2007 3:01 am
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Re: Single Tube PAS* Linestage
by dannyr » Mon Aug 11, 2014 3:59 pm
Geek, thanks for the reply. Maybe I'll just stick to the Single Tube stage sense I know already how it sounds. Are there any cheap options on a power transformer for it that come to mind?
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Re: Single Tube PAS* Linestage
by Geek » Mon Aug 11, 2014 5:11 pm
I used back-to-back transformers. The type with the dual 115V primary windings.
115V --> 6.3V --> 6.3V --> 230V
Rectify and use a simple C-R-C with an "R" to give you the B+
Use the 6.3V for your heaters.
Cheers!
115V --> 6.3V --> 6.3V --> 230V
Rectify and use a simple C-R-C with an "R" to give you the B+
Use the 6.3V for your heaters.
Cheers!
-= Gregg =-
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
-
Geek - KT88
- Posts: 3585
- Joined: Sun Oct 21, 2007 3:01 am
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Re: Single Tube PAS* Linestage
by dannyr » Mon Aug 18, 2014 7:51 pm
Geek, what a great trick. I had no idea that I could do that with two transformers. Are there any phono circuits that would work okay with the outputted voltage range? Thanks.
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Re: Single Tube PAS* Linestage
by Geek » Mon Aug 18, 2014 10:20 pm
Pretty much any tube ones made for the PAS... they draw at most 5mA/board.
-= Gregg =-
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
-
Geek - KT88
- Posts: 3585
- Joined: Sun Oct 21, 2007 3:01 am
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Re: Single Tube PAS* Linestage
by petercapo » Tue Sep 30, 2014 11:42 am
Hi Gregg,
With regard to your single tube PAS linestage, does using a 12SL7 retain a lush quality and what has been called "big tone" from such octal preamp tubes, or is it less so due to the hybrid design, which seems to make it lively, etc..?
Thanks.
Peter
With regard to your single tube PAS linestage, does using a 12SL7 retain a lush quality and what has been called "big tone" from such octal preamp tubes, or is it less so due to the hybrid design, which seems to make it lively, etc..?
Thanks.
Peter
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Re: Single Tube PAS* Linestage
by Geek » Tue Sep 30, 2014 8:15 pm
According to my clients, it retains it.
-= Gregg =-
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
-
Geek - KT88
- Posts: 3585
- Joined: Sun Oct 21, 2007 3:01 am
- Location: Chilliwack, British Columbia
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