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PostPosted: Thu Aug 02, 2018 5:12 pm 
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Joined: Sun Sep 23, 2007 11:55 am
Posts: 102
Location: Calgary, AB, CA
The shipping is worth more than the parts, but at least they are available.
Gary has been very accommodating as usual. Its nice to get that kind of after sales service.

:D Absolutely Im going to keep C6,C6A complete with cascade bypass. Might bump the bias resistor up to 10k.
It would be nice if the vc worked from 10>2 rather than 8>10.


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PostPosted: Thu Aug 02, 2018 6:15 pm 
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Joined: Tue Jul 12, 2011 7:34 am
Posts: 822
Location: Edmonton, AB, CA
Maybe change the VC value? Off hand I don't recall the stock value but 50K (47K) is pretty common. Sometimes the taper is wrong or the value is too high. I have a box of Blue Alps 50K pots for just this occasion. :)

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PostPosted: Thu Aug 02, 2018 7:56 pm 
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Joined: Sun Sep 23, 2007 11:55 am
Posts: 102
Location: Calgary, AB, CA
The pot in my rebuild is 100k. Probably the taper would have more impact?


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PostPosted: Tue Aug 07, 2018 4:55 pm 
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Joined: Sun Sep 23, 2007 11:55 am
Posts: 102
Location: Calgary, AB, CA
Im almost wishing I would have kept this 301. LOL

Attachment:
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Gold plated tube sockets, Amtrans film caps, Nichicon KXM PSU caps, TDK Epcos, and Rubycon bias bypass caps, Wurth Elektronik, custom bias point, custom discrete diode bridge, oversized Hammond choke, full cascade bypass on C6/A,C8/A


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PostPosted: Wed Aug 08, 2018 10:03 am 
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Joined: Thu Jan 26, 2012 10:34 am
Posts: 321
Location: Ardrosssan, AB, CA
That looks like an awesome start to the new build!


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PostPosted: Wed Aug 08, 2018 10:40 am 
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Joined: Tue Jul 12, 2011 7:34 am
Posts: 822
Location: Edmonton, AB, CA
Bruce,

It looks fantastic! You've really outdone yourself this time. :D

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Last edited by petersch on Wed Aug 08, 2018 1:39 pm, edited 1 time in total.

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PostPosted: Wed Aug 08, 2018 12:10 pm 
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Joined: Sun Sep 23, 2007 11:55 am
Posts: 102
Location: Calgary, AB, CA
Im waiting for the last of the parts then I can do the final assembly. I am pretty curious as to how this version is going to sound :D
Thanks for the kind comments.


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PostPosted: Sun Aug 12, 2018 4:26 pm 
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Joined: Sun Sep 23, 2007 11:55 am
Posts: 102
Location: Calgary, AB, CA
I am really happy with the sound of the rebuilt 301. It seems to have worked out very well. I made the choice of not increasing power supply capacitance by much but concentrated on using really good quality PS caps. Also I think the Amtrans coupling caps have turned out to be much better than expected.
There isnt much that can be done with the power supply in the 301, but the discrete diode bridge and the oversized choke, seem to be a really worthwhile upgrade. The inductance goes from 1H to 1.5H
I implemented the change in my own 301, after hearing the rebuilt version.
Attachment:
IMG_20180812_171742734.jpg
IMG_20180812_171742734.jpg [ 321.1 KiB | Viewed 47 times ]


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PostPosted: Sun Aug 12, 2018 5:45 pm 
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Joined: Thu Dec 14, 2017 6:04 pm
Posts: 11
Location: Okanagan falls, BC, CA
Brooster wrote:
I am really happy with the sound of the rebuilt 301. It seems to have worked out very well. I made the choice of not increasing power supply capacitance by much but concentrated on using really good quality PS caps. Also I think the Amtrans coupling caps have turned out to be much better than expected.
There isnt much that can be done with the power supply in the 301, but the discrete diode bridge and the oversized choke, seem to be a really worthwhile upgrade. The inductance goes from 1H to 1.5H
I implemented the change in my own 301, after hearing the rebuilt version.
Attachment:
IMG_20180812_171742734.jpg


Looks great...

-- 13 Aug 2018 01:45 --

Brooster wrote:
I am really happy with the sound of the rebuilt 301. It seems to have worked out very well. I made the choice of not increasing power supply capacitance by much but concentrated on using really good quality PS caps. Also I think the Amtrans coupling caps have turned out to be much better than expected.
There isnt much that can be done with the power supply in the 301, but the discrete diode bridge and the oversized choke, seem to be a really worthwhile upgrade. The inductance goes from 1H to 1.5H
I implemented the change in my own 301, after hearing the rebuilt version.
Attachment:
IMG_20180812_171742734.jpg


Looks great...


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