K&K Audio / Lundahl Transformers

Welcome! Need support, you got it. Or share youe ideas and experiences.

Return to K&K Audio / Lundahl Transformers


Message Sort: Post Order or Asylum Reverse Threaded

Tube Preamp for sale

99.178.170.55

Posted on July 6, 2017 at 07:29:00
KevinC
Manufacturer

Posts: 2984
Location: NC
Joined: April 19, 2001



My friend Henry has decided to sell his vacuum tube stereo preamp he constructed back in the mid 2000s. It is a two chassis job, repurposing a nice looking David Hum Passive Preamp case for the audio portion and a separate power supply case of the industrial sort on a 6 foot umbilical. Henry's construction quality is excellent as you will be able to see from the pictures, if you are interested in looking.

The topology is an early version of my implementation of the single stage differential triode (5687) amplifier with a phase splitting transformer in and another larger line output transformer. The transformer types used are both Lundahl products (2 x LL1544 and 2 x LL1660/PP selling now for about $400 new). The power supply is a choke loaded design with the choice of a tube or resistor damped silicon diode full wave rectifier (the latter is installed). The volume controls are mono laser trimmed thick film Alps 21 detented stepped attenuators.

The price is a firm $275 plus shipping, if that is required. Send me an e-mail if you would like to see all of the pictures.

Kevin Carter
K&K Audio
www.kandkaudio.com

 

Hide full thread outline!
    ...
RE: Tube Preamp sold, posted on July 11, 2017 at 05:35:44
KevinC
Manufacturer

Posts: 2984
Location: NC
Joined: April 19, 2001
nt
Kevin Carter
K&K Audio
www.kandkaudio.com

 

RE: Tube Preamp sold, posted on July 11, 2017 at 07:07:58
Wojciech
Audiophile

Posts: 4131
Joined: June 23, 2009
Oh crap :) It would be a perfect active stage for my passive RAkK Mk III
(and perfectly cheap to boost )

 

Page processed in 0.017 seconds.