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Old 12th January 2018, 11:58 PM   #1191
6L6 is offline 6L6  United States
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I agree
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Old 13th January 2018, 12:10 AM   #1192
drpro is offline drpro  United States
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So ideally a larger wider, deeper case would be the better choice
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Old 13th January 2018, 01:44 AM   #1193
lehmanhill is offline lehmanhill  United States
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I don't qualify as one of the more experienced, but here is my two cents.

1. input signal a short run to the Impasse board. tightly twisted of course.
2. trafo at the opposite end of the case from the input
3. if you have to run the mains power and the input in the same panel, have the mains power cord run as far from the Impasse board as possible and at roughly the same level as the Impasse board. I have read that a source that is edge level to a pcb with have less interference than on at a big height difference.
4. I might turn the opening in the trafo bell away from the signal pcb. I couldn't manage that because I had the F4 pcb on the other side.

In one build, I put the trafo at the front of the case and put the mains inlet on the side of the case with a 90 degree power cord. That way I got some shielding from the power cord by the case. It also meant a short mains run to the trafo. That meant the back panel was only input and output.

In my Impasse/F4 build, the mains power inlet is about 4" from the closest input transformer. The power transformer is 7 or 8 inches from the Impasse input transformer. It's closer than I would like, but the unit is quiet regarding hum. I admit, I was worried about this.

Last edited by lehmanhill; 13th January 2018 at 01:47 AM.
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Old 13th January 2018, 02:22 AM   #1194
6L6 is offline 6L6  United States
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Lehmanhill - You actually built one, so yes, you do count as "more experienced".

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Old 13th January 2018, 02:50 AM   #1195
jackinnj is offline jackinnj  United States
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Counted by the number of boards which have sold, a few hundred folks have built the Impasse.
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Old 13th January 2018, 03:28 AM   #1196
6L6 is offline 6L6  United States
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You've sold 2000 boards? That would be fantastic! When I was selling parts kits for a few projects it seemed that completion was maybe 10%...

Last edited by 6L6; 13th January 2018 at 04:47 AM.
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Old 13th January 2018, 03:37 AM   #1197
drpro is offline drpro  United States
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Good advice all. I think I can keep the case I just board for another project and order a roomier case from the store, then I can spread things out.
Thanks guys

David
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Old 19th January 2018, 06:11 PM   #1198
CharlesT is offline CharlesT  United States
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Default jackinnj

Quote:
Originally Posted by jackinnj View Post
Counted by the number of boards which have sold, a few hundred folks have built the Impasse.
Hey Jack (jackinnj), could you please be kind enough to reply to the PM's I have sent you.

I have made the paypal payment for the 2 sets of Impasse Pre pcb's with DMosFets a few days ago and you didn't get back to me about any shipping info etc.

Thanks,
Charles
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Old 18th March 2018, 02:16 AM   #1199
drpro is offline drpro  United States
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Thank you all for your insights and Jack for the boards. Went with a roomier store case per suggestions and a mu-metal divider to keep those nasty fields at bay.

A very nice addition to the F4 and MoFo amps I have constructed. I have recently completed the AKSA Lender preamp with higher gain daughter boards. So a listening session with the Pass diy BA-3, Sy's ImPasse and Hugh's AKSA Lender preamps driving the F4s seen in the photo will be forthcoming.

Regards to all,
David
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Old 18th March 2018, 02:21 AM   #1200
anatech is offline anatech  Canada
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Nice build, Stuart would like that.

-Chris
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