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Old 14th August 2013, 09:20 PM   #481
6L6 is offline 6L6  United States
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Quote:
Originally Posted by lehmanhill View Post
values for R7, R8, and R27 are needed.
R7 - 1K (however, that's the easiest to adjust, merely twist it whatever what you need to set 0V dc on the outputs)

R8 - 1K (I would use a resistor here, not a pot, unless you truly need it)

R27 - 68.2K

Quote:
In the past, metal film resistors like Panasonic ERX have sounded very detailed but a little cool. Thick film TO-220 resistors like Caddock MP930 have sounded slightly less detailed and a little warmer. Is something like this been experienced in the Aleph?
Because of expectation bias, yes.
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Old 14th August 2013, 09:24 PM   #482
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Wink Alternate C2, C3

For those of you in Europe, a good choice for a compact C2 and C3 with very good sound quality is the Elna RJH series, 220 uF, 50v. They are available through Elfa-Distrelec. Of course, the shipping to the US is extreme, so I'll be using fat Muse caps, but I would be giving the RJH a try in this amp if I could get them for a reasonable price.
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Old 14th August 2013, 09:27 PM   #483
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Quote:
Originally Posted by 6L6 View Post
Because of expectation bias, yes.
Thanks for the nominals, 6L6.

If I'm only listening to expectations, I'll save the money and go metal film. ;-)

Thanks.
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Old 14th August 2013, 09:31 PM   #484
6L6 is offline 6L6  United States
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If Papa uses the ERX in the production Firstwatt and Pass Labs stuff, it's certainly good enough for me!!
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Old 14th August 2013, 09:37 PM   #485
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Quote:
Originally Posted by 6L6 View Post
Because of expectation bias, yes.
This post, one of my all time favorites, illustrates what Jim (6L6) said:

Would removing the LEDs in my F4 or any FW amplifier yield better sound?

Last edited by grimberg; 14th August 2013 at 09:45 PM.
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Old 15th August 2013, 12:55 AM   #486
jrebman is offline jrebman  United States
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Just saying hi and checking in -- I have my rev 2 boards from the store, H_A is putting together a semi set for me, and I have a pair of rather large Conrad mf35-151.5 heatsinks in hand already. Plan to build a couple of monoblocks (no room on rack for a stereo amp so the monos sit off to the side closer to the speakers.) I've read most of the last 30 pages of this thread and have a pretty good idea of what to buy.

I'm normally a low power SET tube guy but this amp has caught my attention for a variety of reasons.

Thanks to all of you who have put so much time nd effort into making this such a nice project and I'll be keeping my ears open for the build manual. Lots of experience with tube amp builds, none in several decades with pcbs and SS.

BTW, 6L6 -- I'm just up the road in Boulder.

Thanks again,

Jim
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Old 15th August 2013, 02:43 AM   #487
6L6 is offline 6L6  United States
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jrebman - Monoblocks are a great idea! It keeps the possibility of ground loops down to basically nil! Better isolation, easier to make a really big PSU, it's all good.

I'll shoot you a PM with contact info, I would love to meet up sometime!

-Jim (also)
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Old 15th August 2013, 01:54 PM   #488
jrebman is offline jrebman  United States
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Hi Jim,

Thanks and I'll returnthe PM a little later today when I have a bit of time. I'm really looking forward to this build.

Thanks,

Jim
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Old 15th August 2013, 02:02 PM   #489
henryve is offline henryve  South Africa
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How do I know what is happening with my boards? I pre-ordered boards over a month ago, but have not received any e-mail notification that it has been shipped now that it is in stock. Who would I have to talk to?

EDIT: Oh brother! Never mind. I ordered the new PSU boards also and I see that they still have not hit the store. Now ETA of 31 August.

Last edited by henryve; 15th August 2013 at 02:05 PM.
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Old 15th August 2013, 11:45 PM   #490
12B4A is offline 12B4A  United States
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Yeah, I ordered my PSU boards the day pre-orders started. We must have been in the last half.
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