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View Full Version : FS: Passive preamp, Pass B1 R2 with built in MM phono stage



disarmamant
16-06-2018, 09:14
For sale, my passive preamp using the Nelson Pass B1 R2 complimentary JFET buffer design, direct coupled with no capacitors in the signal path.

http://i.imgur.com/byuvtHa.gif

Two box construction with dual low noise shunt regulated power supply, preamplifier and screened umbilical connecting cable.

The preamp uses a complimentary pair of matched Toshiba JFETs, a quality Swiss Elma selector switch and 100K stepped attenuator with Dale resistors. The inbuilt MM phono stage is built on an Elliot Sound Products phono PCB and uses a pair of AD823AN jfet input opamps.

The preamp has one phono input, three line inputs and an earth binding post for the phono stage. Gold plated RCA input and output sockets with PTFE insulation. Silver plated PTFE insulation signal wiring.

https://dl.dropbox.com/s/0h0mq7eelcicdas/pair%20side%20by%20side.jpg?dl=0
https://dl.dropbox.com/s/dhqfogxkm0m8qxj/preamp%20front.jpg?dl=0
https://dl.dropbox.com/s/csootvt7s60f871/Pre%20inside.jpg?dl=0
https://dl.dropbox.com/s/qqzhhszyh80ay1i/preamp%20rear.jpg?dl=0
https://dl.dropbox.com/s/om7s8iuelvnfilk/psu%20front.jpg?dl=0
https://dl.dropbox.com/s/dk2uvq3gv3xjp7g/psu%20rear.jpg?dl=0
https://dl.dropbox.com/s/o7wb9vsj0l9oofi/2%20stacked.jpg?dl=0
https://dl.dropbox.com/s/j8gao9n0e46z6o2/2%20stacked%20rear.jpg?dl=0


I'd like £185 plus RMSD postage at cost.

lordmortlock
16-06-2018, 09:21
You make some lovely things Martin. I wish I had just a hundredth of your talent!

Barry
16-06-2018, 09:31
You make some lovely things Martin. I wish I had just a hundredth of your talent!

+1 Beautifully built and presented. Well done Martin. :)

I don't expect this will hang around for long. GLWS

disarmamant
16-06-2018, 09:50
[emoji4] Thanks!


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walpurgis
16-06-2018, 13:00
Major pre-amp bargain here. Looks great!

struth
16-06-2018, 13:05
Major pre-amp bargain here. Looks great!

too true.

SteveW
16-06-2018, 14:03
PM sent
Cheers

Natara
17-06-2018, 06:55
Well done! What a fantastic looking amp.

Idlewithnodrive
17-06-2018, 08:55
If Steve hasn't already snaffled this, I'd be interested too 😀

Bigman80
17-06-2018, 08:57
Join the queue. I'm 3rd in line!
If Steve hasn't already snaffled this, I'd be interested too [emoji3]

disarmamant
17-06-2018, 09:08
Sorry guys. It’s sold, subject to payment etc, to the first to reply.


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