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Old 11th March 2011, 09:07 PM   #1
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Location: Canada, Qc
Default FS: Pair of RTP3 Tube Preamp PCB assembled

Hi. For sale a pair of RTP3 Tube Preamp (Vacuum State RTP3C tube preamp clone) built from a French Group buy design.

They come FULLY ASSEMBLED using very good quality MRS25 Vishay, MILLS resistors, Azuma gold plated tube sockets, Vishay, Panasonic, Wima, Mundorf caps, etc. They come with all the needed parts already mounted, EXCEPT the needed matched FETs. There small sockets installed so you can matched your own fets, or get them from a very recommended seller of match fet on this very forum. I know I bought matched quad from him for my Pearl2.

Assembly is of excellent quality using 2% silver solder. People that know me can tell you that I do a good job assembling boards.

I already modified the boards to add heater voltage regulators slow start circuit, to protect the numerous lamps ever further

The only thing missing to complete this great preamp are the tubes (10 x 6922 needed), the supply power transformers, the two volume steps attenuators, and the input connectors, mute and selector switch. Parts list, schematics, documentation will all be included with the boards.

Sold as a pair since each PCB is for one channel only. This is the preamp section only of the RTP3. It doesn't include the phono section.

See these threads for the details:

AudiyoFan.org :: Voir le sujet - Preamp Symetrique. Ca avance !

Index of /preamp

This is a very sophisticated tube preamp, fully dual mono, fully balanced with FET current source bias and built-in HV shunt regulator.

Take note that these PCB are impossible to find anymore.

The price asked cover only my parts cost, less the shipping, taxes and custom fees I had to pay, and you got it assembled for free too. My lost if your gain... I'm only selling these to get some money to build the real Vacuum State RTP3 kit (point to point assembly, separate supply, Front Panel Express custom case, etc...)

A warning! This is not a beginner kit. It is a very sophisticated balanced tube circuit with HV shunt regulator. You need to know how to complete the preamp, interconnect and test everything, etc. I won't be able to offer much support since I won't have the working boards with me to assist you over email. And since I never completed the preamp, I don't have reference readings either. I tested all the supply sections of the board and they are ok. The rest is just the preamp (fet and tubes) and should be straight forward.
But beware that you need to know how tube circuit works, HV work, etc...

Asking 300$ (for the pair) + shipping

(just for the record I sold previously bare PCB for 35$ each...)

Accept PayPal. This is your one and only chance to get a pair of these so...
Send me a personal email if interested.
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Last edited by Algar_emi; 11th March 2011 at 09:10 PM.
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Old 12th March 2011, 01:47 AM   #2
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Already received offers from Pocoyo (1st), and Sachi (2nd).
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Old 12th March 2011, 01:21 PM   #3
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There is already 4 interested buyers. Until further notice there is probably no point in contacting me for further offers. Tx.
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Old 13th March 2011, 08:56 AM   #4
Pocoyo is offline Pocoyo  Indonesia
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Quote:
Originally Posted by Algar_emi View Post

... (just for the record I sold previously bare PCB for 35$ each...)

Accept PayPal. This is your one and only chance to get a pair of these so...
Send me a personal email if interested.
Hi Algar

i looks for 2 pcs bare pcb
pls let me know if you still got them
i want to know what the magic inside

Thank you, best regards
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Old 14th March 2011, 01:14 AM   #5
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Pocoyo, sorry no more bare board.

Sachi you have mail.
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Old 15th March 2011, 09:32 AM   #6
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Sold! to stoolpigeon. Tx.
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