[NJARC] Tube amp for smartphones

[antqradio at sbcglobal.net]

Kit was available for substantially less money just a few years ago, see:http://diyaudioprojects.com/Tubes/6418-Tube-Preamp-Headphone-Kit/

Schematic is also found on the above link so one could easily roll your own, if so inclined.
One question: If the tubes used in this amp are so microphonic and those tubes are wired in as drivers for the two channel op-amp, how can the reported distortion possibly be so low?
Did anyone else notice that Burr-Brown is misspelled on the label?Jim


      From: Retevis <retevis at comcast.net>
 To: Alex Magoun <a.b.magoun at ieee.org> 
Cc: njarc at mailman.qth.net
 Sent: Tuesday, May 3, 2016 6:26 PM
 Subject: Re: [NJARC] Tube amp for smartphones
   
I'll let you folks know. Just ordered one. Best wishes. Bob Tevis

Sent from Bob's iPhone
On May 3, 2016, at 12:15 PM, Alex Magoun <a.b.magoun at ieee.org> wrote:


Just remember
Reply = Poster
Reply All = Everyone

_________________________________________________________


Sounds promising. . . http://www.thetubestore.com/Parts-Accessories/Amps-and-Amp-Kits/Hybrid-Valve-Headphone-Amp.
Alex
~~~
Alexander B. Magoun, Ph.D., Outreach Historian
IEEE History Center
Samuel C. Williams Library 3rd FloorStevens Institute of Technology1 Castle Point Terrace
Hoboken NJ 07030-5991
USA

+1 732-981-3414
a.b.magoun at ieee.org
www.ethw.org at IEEEHistory 
www.ieee.org/history_center

IEEE - Advancing Technology for Humanity


______________________________________________________________
NJARC mailing list
Home: http://mailman.qth.net/mailman/listinfo/njarc
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:NJARC at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Just remember
Reply = Poster
Reply All = Everyone

_________________________________________________________

______________________________________________________________
NJARC mailing list
Home: http://mailman.qth.net/mailman/listinfo/njarc
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:NJARC at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/mailman/private/njarc/attachments/20160504/fb73e85e/attachment.html>