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+--- Sujet : Sakuma 845 phono pre / CD Buffer (/showthread.php?tid=14569)
Sakuma 845 phono pre / CD Buffer - Mt230484 - 09/10/2026
Apologies for not posting in French, as I am from the dutch speaking part of Belgium, and not sure I can communicate properly in French...
This is a mono phono preamp and stereo cd buffer built by Susumu Sakuma himself.
You can find the schematic on the site with his works : https://www5.big.or.jp/~dh/work/02B_2.html
It came to me with an 211 tube installed, but I have returned it to the original 845 output stage. But will include the correct resistor for 211 as well.
Phono input is the classic TKS27 MC SUT, going into a 5691 (red base spare included), followed by the Sakuma EQ correction circuit. Special in this preamp is, it has a prototype built by Tamura, that is the predecessor of the Tamura VL-SS, which is a choke with 3 taps, that allows the user to tailor the sound a bit. This prototype differs from the final production model, in that Tamura also installed the required resistors and capacitors (vitamin Q in this case) in the casing.
There is also a CD buffer input, consisting of a stereo input, that gets summed to mono by a transformer. Switch selects between phono or cd input.
Output stage is a 845 tube. A chinese 211 is included, as well as an Elrog 242 tube, for those who which to go all the way
Output tube goes through a Tamura F-2007 output transformer at 8ohms, connected to a volume pot, and back through a step-up transformer. Classic Sakuma volume control. That output transformer has each of it's windings connected to an output, for easy connection to a stereo setup
Rectifier tube is a Western Electric 422A tube, in excellent condition
Power transformer is rated for 100V, autoformer for 230V included if necessary.
If more information is required, just send me a message!
This is a unique amplifier, in that none of Sakuma-san's amplifiers were ever commercially available.
Make me an offer, can be a trade as well, if you have something interesting
(looking for a turntable, EMT,...)Preamp is located in Belgium
RE: Sakuma 845 phono pre / CD Buffer - Julien - 09/10/2026
Incredible preamp!
One of a kind in Europe for sure!!
Just to know: how did you manage to get that? Brought it back from a trip in JP?
Julien