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Old 23rd September 2013, 10:53 AM   #2411
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To be honest, I don't recall. I don't have the kit nearby, as I said: this is a long term project. But I guess he delivered the parts mentioned in the BOM

http://www.fetaudio.com/wp-content/u...-BOM-Cost2.pdf
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Old 27th September 2013, 01:00 PM   #2412
6L6 is offline 6L6  United States
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A request for assistance -

Would anybody be willing to make a BOM for the F5Tv2 and F5Tv3? Preferably with Mouser part numbers? The community would be very grateful.
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Old 27th September 2013, 02:01 PM   #2413
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I'm happy to have a bash
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Old 27th September 2013, 05:38 PM   #2414
Variac is online now Variac  United States
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now that we have JFETS in the store, could someone comment on what grades would work best? I think "Papa" mentioned "B and C" but aren't sure I remember correctly.

http://www.diyaudio.com/store/parts/...o-92-jfet.html
http://www.diyaudio.com/store/parts/...o-92-jfet.html

There are links to their spec sheets

Last edited by Variac; 27th September 2013 at 07:59 PM.
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Old 27th September 2013, 06:04 PM   #2415
henryve is offline henryve  South Africa
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For the F5 I would expect the B to be the best fit.

Last edited by henryve; 27th September 2013 at 06:07 PM.
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Old 29th September 2013, 01:49 AM   #2416
SRMcGee is offline SRMcGee  United States
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Folks:

Your advice on the positioning of the toroid and power supply pcb would be appreciated. I'm building several F5T amps with friends. We've purchased 5U/400mm "big amp" enclosures from the Store, 1000 VA SumR toroids and are using large power supply pcbs supplied by Buzzforb. My question: is it better to (a) center the toroid in the chassis and mount the power supply pcb on standoffs directly above the toroid or (b) follow the more traditional approach of mounting the toroid towards the front of the enclosure and the power supply pcb on the floor towards the rear? It seems to me that (a) minimizes any blocking of the vents on the bottom plate and would maximize airflow through the chassis around the toroid/ps pcb stack, whereas (b) maximizes vertical space above both the toroid and ps pcb at the possible expense of impeding air flow from below.

As newbies, we're open to either approach and assume that someone has exhaustively assessed both options. And if not, does anyone have a considered opinion?

Regards,
Scott
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Old 29th September 2013, 02:47 AM   #2417
6L6 is offline 6L6  United States
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Scott - I would do whatever will place the PSU board closest to the amp boards. In the 5U, that will likely mean the toroid towards the front and PSU towards the rear, however you have lots of flexibility in heighth because the 5U is so tall.

It's going to come down to wether or not you can mount the PSU and toroid on the floor of the amp, in a way you like.
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Old 29th September 2013, 07:21 PM   #2418
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Quote:
Originally Posted by 6L6 View Post
Scott - I would do whatever will place the PSU board closest to the amp boards. In the 5U, that will likely mean the toroid towards the front and PSU towards the rear, however you have lots of flexibility in heighth because the 5U is so tall.

It's going to come down to wether or not you can mount the PSU and toroid on the floor of the amp, in a way you like.
While on the topic of the 5U case (which I am also using) and its floor space for power supply doo dads, I have a question. My previous F-5 build has a floor pan made from 1/8 inch 6061 aluminum, and I mounted the POWER SUPPLY diodes (MUR) to the floor pan of the amp as heatsinking. With the 5U case, this would mean attaching them to that perforated metal floor....is this sufficient heatsink for those MUR PS diodes? (As supplied from Buzzs group buy kit)

Thanks,

Russellc
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Last edited by Russellc; 29th September 2013 at 07:23 PM.
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Old 29th September 2013, 07:28 PM   #2419
Zen Mod is offline Zen Mod  Serbia
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it is

don't forget insulators , though
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Old 29th September 2013, 08:56 PM   #2420
6L6 is offline 6L6  United States
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^^^ What he said.

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