Thebiglebowski
09-08-2016, 20:16
This is an early OTO and I have owned for a short while, it was refurbished by SJS last year and had a full set of new Tung-Sol valves fitted (ECC82, ECC83 & EL84)
Earlier this year (Feb 2016) I had some extra work done by Deco Audio who are Audio Note approved dealers and service center.
They replaced the original caps and resistors with all new Audio Note copper foil caps and tantalum resistors for the amp and AN tin foil caps in the phono which are normally found in the much higher or signature models.
It also has a Goldmund stepped attenuator fitted instead of the original AN pot at a cost of £150, the balance has been bypassed but is still present and can be reconnected by the new owner.
As with the older OTO amps the case is a little dented in places and some of the screws have been rather enthusiastically tightened and no longer grip, the ones on the side are OK and it never bothered me.
Here is the detail of the work by Deco Audio, all in this is an amazing amp and I'm only selling as I recently purchased an SJS 300B power amp and pre.
On the Power and Pre PCB there are 33, 1/2 Watt Resistors and (to take the extra Current) 4, 1 Watt Resistors to be replaced with Tantalum types.
The 4 Audio Coupling Capacitors are to be changed to Audio Note Copper versions and on the Phono PCB the 4 Coupling Caps are to be changed to A/N Tin versions.
Whilst open I suggest some of the Electrolytics are replaced on all three PCB’s.
The Balance Control is not connected at all and as you mentioned you would not use it I suggest we leave it out of the circuitry.
As we discussed, the Large PSU Capacitor I suggest leaving. It has been done quite neatly and just requires a tidy of the Wiring. It’s an ELNA Cerafine so quite a nice Cap.
As far as I can tell the ‘standard’ Electrolytic in an Audio Note is a Rubycon (Black Gate if there were some still!). I have chosen Panasonic and Nichicon as these we have found to be very good, reliable and can tolerate the higher Temperatures.
The costs for the above are as follows;
(33 X) 0.5 Watt Audio Note Tantalum Resistors......................................... .............£117.60
(4 X) 1.0 Watt Audio Note Tantalum Resistors......................................... ............£26.40
(2X) 0.22uF Audio Note Copper Foil Capacitors........................................ ...........£72.00
(2X) 0.47uF Audio Note Copper Foil Capacitors........................................ ...........£95.40
(4X) 0.22uF Audio Note Tin Foil Capacitors........................................ .................£65.32
(5X) 22uF/450V Panasonic 105 Degrees Electrolytic Capacitors...........................£7.25 (Pre & Pwr PSU Smoothing)
(4X) 220uF/100V Panasonic 105 Degrees Electrolytic Capacitors.........................£2.36 (EL84 Cathode Caps)
(2X) 47uF/450V Nichicon 105 Degrees Electrolytic Capacitors.............................£5.60 (Phono Stage PSU Smoothing)
(4X) 100uF/16V ELNA Cerafine Electrolytic Capacitors.......................................£ 4.24 (Phono Stage Cathode Caps)
3 Hours Labour @ £60 per Hour.............................................. ..........................£180.00
Total............................................. .................................................. .£576.17
(All Prices inc VAT)
£1400 cash on collection but I may ship (to the UK only) though.
https://c1.staticflickr.com/9/8828/28592812120_47be6447b6_c.jpg (https://flic.kr/p/KyDCTj)IMG_0542 (https://flic.kr/p/KyDCTj) by The Biglebowski (https://www.flickr.com/photos/125918586@N03/), on Flickr
https://c7.staticflickr.com/9/8656/28260060654_cf3d361416_c.jpg (https://flic.kr/p/K4fct5)IMG_0544 (https://flic.kr/p/K4fct5) by The Biglebowski (https://www.flickr.com/photos/125918586@N03/), on Flickr
https://c7.staticflickr.com/9/8857/28592811950_0f4544c9db_c.jpg (https://flic.kr/p/KyDCQo)IMG_0543 (https://flic.kr/p/KyDCQo) by The Biglebowski (https://www.flickr.com/photos/125918586@N03/), on Flickr
Earlier this year (Feb 2016) I had some extra work done by Deco Audio who are Audio Note approved dealers and service center.
They replaced the original caps and resistors with all new Audio Note copper foil caps and tantalum resistors for the amp and AN tin foil caps in the phono which are normally found in the much higher or signature models.
It also has a Goldmund stepped attenuator fitted instead of the original AN pot at a cost of £150, the balance has been bypassed but is still present and can be reconnected by the new owner.
As with the older OTO amps the case is a little dented in places and some of the screws have been rather enthusiastically tightened and no longer grip, the ones on the side are OK and it never bothered me.
Here is the detail of the work by Deco Audio, all in this is an amazing amp and I'm only selling as I recently purchased an SJS 300B power amp and pre.
On the Power and Pre PCB there are 33, 1/2 Watt Resistors and (to take the extra Current) 4, 1 Watt Resistors to be replaced with Tantalum types.
The 4 Audio Coupling Capacitors are to be changed to Audio Note Copper versions and on the Phono PCB the 4 Coupling Caps are to be changed to A/N Tin versions.
Whilst open I suggest some of the Electrolytics are replaced on all three PCB’s.
The Balance Control is not connected at all and as you mentioned you would not use it I suggest we leave it out of the circuitry.
As we discussed, the Large PSU Capacitor I suggest leaving. It has been done quite neatly and just requires a tidy of the Wiring. It’s an ELNA Cerafine so quite a nice Cap.
As far as I can tell the ‘standard’ Electrolytic in an Audio Note is a Rubycon (Black Gate if there were some still!). I have chosen Panasonic and Nichicon as these we have found to be very good, reliable and can tolerate the higher Temperatures.
The costs for the above are as follows;
(33 X) 0.5 Watt Audio Note Tantalum Resistors......................................... .............£117.60
(4 X) 1.0 Watt Audio Note Tantalum Resistors......................................... ............£26.40
(2X) 0.22uF Audio Note Copper Foil Capacitors........................................ ...........£72.00
(2X) 0.47uF Audio Note Copper Foil Capacitors........................................ ...........£95.40
(4X) 0.22uF Audio Note Tin Foil Capacitors........................................ .................£65.32
(5X) 22uF/450V Panasonic 105 Degrees Electrolytic Capacitors...........................£7.25 (Pre & Pwr PSU Smoothing)
(4X) 220uF/100V Panasonic 105 Degrees Electrolytic Capacitors.........................£2.36 (EL84 Cathode Caps)
(2X) 47uF/450V Nichicon 105 Degrees Electrolytic Capacitors.............................£5.60 (Phono Stage PSU Smoothing)
(4X) 100uF/16V ELNA Cerafine Electrolytic Capacitors.......................................£ 4.24 (Phono Stage Cathode Caps)
3 Hours Labour @ £60 per Hour.............................................. ..........................£180.00
Total............................................. .................................................. .£576.17
(All Prices inc VAT)
£1400 cash on collection but I may ship (to the UK only) though.
https://c1.staticflickr.com/9/8828/28592812120_47be6447b6_c.jpg (https://flic.kr/p/KyDCTj)IMG_0542 (https://flic.kr/p/KyDCTj) by The Biglebowski (https://www.flickr.com/photos/125918586@N03/), on Flickr
https://c7.staticflickr.com/9/8656/28260060654_cf3d361416_c.jpg (https://flic.kr/p/K4fct5)IMG_0544 (https://flic.kr/p/K4fct5) by The Biglebowski (https://www.flickr.com/photos/125918586@N03/), on Flickr
https://c7.staticflickr.com/9/8857/28592811950_0f4544c9db_c.jpg (https://flic.kr/p/KyDCQo)IMG_0543 (https://flic.kr/p/KyDCQo) by The Biglebowski (https://www.flickr.com/photos/125918586@N03/), on Flickr