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View Full Version : Onix OA21S integrated amp



Conan
21-11-2014, 22:58
This Onix OA 21S features the Moving Magnet Phono board and has had the following work done in February 2014.

http://i1153.photobucket.com/albums/p519/casa73/1_zps7868b9c8.jpg (http://s1153.photobucket.com/user/casa73/media/1_zps7868b9c8.jpg.html)

All small electrolytics bar main reservoir caps replaced.
Panasonic HFQs, Nichicon FineGold and Vishay Polys on the Phono board
Panasonic HFQ's, Nichicon Muse and Toshiba TK series on main PCB
Output resistors and trannies replaced along with all four power output transistors (genuine MJ15003/MJ15004s)
new silver high conductivity heatsink compound underneath
All biased correctly to spec and singing absolutely beautifully

Sadly, however, the ALPS input selector is on its way out. Tuner and tape inputs still work for CD but others are a bit hit and miss.

So selector will eventually need to be desoldered and replaced. You could get a cheapie Maplin job (if you were happy with the phono input and a couple of the line level ones) or you could go with with a '4-pole, 6-way rotary with the stop set to ways', according to Tony Brady. Hi-Fi Collective do a nice one...

http://www.hificollective.co.uk/imag...den4pole6l.jpg

Case is in very good condition for the age bar a missing sliver of paint at one of the rear bottom corners. Plus one Allen bolt is missing.


http://i1153.photobucket.com/albums/p519/casa73/2_zpsb8deac0b.jpg (http://s1153.photobucket.com/user/casa73/media/2_zpsb8deac0b.jpg.html)

http://i1153.photobucket.com/albums/p519/casa73/4_zps52499e86.jpg (http://s1153.photobucket.com/user/casa73/media/4_zps52499e86.jpg.html)

http://i1153.photobucket.com/albums/p519/casa73/3_zps959cd2b1.jpg (http://s1153.photobucket.com/user/casa73/media/3_zps959cd2b1.jpg.html)

http://i1153.photobucket.com/albums/p519/casa73/6_zps1cb0c6f6.jpg (http://s1153.photobucket.com/user/casa73/media/6_zps1cb0c6f6.jpg.html)


£160 + shipping