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diyAudio F5 Build Guide
diyAudio F5 Build Guide
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Old 11th March 2019, 10:57 PM   #71
Trismos is offline Trismos  Canada
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Join Date: Feb 2012
Location: Yellowknife
Really appreciate it astromo. Oddly enough, I found the information right where it probably should be, in the schematics: 2.5 slow. Reading schematics is like reading sheet music, I'm not very good at it - and being a drummer, I'm generally forgiven for not being able to understand it anyways. I sent a query off to the DIY store as well and they suggested a 3 amp fastblow.
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Old 23rd May 2019, 02:23 PM   #72
Tuberoller is offline Tuberoller  United States
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Had the same question myself. Building the F5 using the store back panel kit and guide from 6L6, F5v3.

2.5 amps, slow blow I think is correct

Just make sure the cartridge is also the correct size.
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Old 7th August 2019, 05:33 PM   #73
Melamst is offline Melamst
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Default PSU Filter capacitor value?

Hi, I see 4x 22,000’s (per side) in 6L6’s guide, whereas the original schematic from Papa had 15,000’s - and some have used 10,000’s “because that’s what they had.”

I’ve been trying to figure out from reading and researching how to optimally figure filter capacitor values. I believe I’ve read conflicting reports about how much is enough versus too much filter capacitance in a system.

For my build, I’m using the AnTek AS-4218 400VA 2x0-18, and I’m using the psu board from diyaudio.

So I have two questions:
1. What value filter capacitors should I buy for my system?
2. Why? (what’s the math/magic formula, or what article should I read)
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Old 8th August 2019, 05:12 PM   #74
Melamst is offline Melamst
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Oh, well. Took a few days of searching/reading but I found an answer I trust: Linear Power Supply Design
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Old 9th August 2019, 09:28 AM   #75
astromo is offline astromo  Australia
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Quote:
Originally Posted by Trismos View Post
Really appreciate it astromo. Oddly enough, I found the information right where it probably should be, in the schematics: 2.5 slow. Reading schematics is like reading sheet music, I'm not very good at it - and being a drummer, I'm generally forgiven for not being able to understand it anyways. I sent a query off to the DIY store as well and they suggested a 3 amp fastblow.
Quote:
Originally Posted by Tuberoller View Post
Had the same question myself. Building the F5 using the store back panel kit and guide from 6L6, F5v3.

2.5 amps, slow blow I think is correct

Just make sure the cartridge is also the correct size.

I used the guidance in the link I noted back in Post #70 diyAudio F5 Build Guide
for a Universal PSU build for an Aleph J that I've recently completed but used a large transformer than standard. I've eyeballed a crappy wall plug "watt meter" and its reading a starting and operating current in line with that intel, so I'd say it checks out.


The First Watt F5 manual that I linked to concurs with Tuberoller. Take a look on p.18.
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Old 9th August 2019, 10:23 AM   #76
astromo is offline astromo  Australia
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Quote:
Originally Posted by Trismos View Post
Well, after some fun with FedEx, my chassis finally arrived. 5 days from Italy to Edmonton where it sat for 5 more days with a delivery pending notice.... which then went to "delivery date unavailable". I had to spend quite a bit of time figuring out that FedEx wanted customs fees from me but once paid it was here the next day.
So far everything seems to be going rather nicely. I have a few remaining resistors and LEDs on the way, and other than having to drill out the back plate to accept the RCA blocks properly, all is looking rather nice. I see there's a fuse block for a couple of 250V fuses in the power supply module. I don't suppose anyone has a Digikey or Mouser PN for these? I don't believe I'll be finding these in town here...
Attachment 740885
You can get some cues from this piece:

Back panel parts kit plus PCB / Transistor / Diode mounting parts kit – diyAudio Store

As per the intel above, if you got yourself a UMS chassis from diyAS, these receptacles (or similar) should fit:
Please complete the security check - Octopart
Please complete the security check - Octopart
... worked for me.

... and the power entry module from the store page. I went for one with a green LED.

Last edited by astromo; 9th August 2019 at 10:29 AM.
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Old 14th August 2019, 01:54 PM   #77
Torstensson is offline Torstensson  Sweden
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Join Date: Oct 2012
I hope its ok to reply in this thread.
Was planning on building the F5 and just wanna make sure I got it all.

From The diyAudio Store
- F5 boards
- F5 kits part kit
- Deluxe 4u aluminium + back panel kit
- Linear Systems Matched Lsj74/Lsk170 JFET Pairs
- Universal Power Supply

Other
- Transformator 500VA - Would this be a good match? http://www.sedlbauer.de/media/ringke...t_826058_e.pdf
- Parts for Universal Power Supply


Seen these rectifier blocks but my local store doesnt carry them, anyboy who know where I can find them?
Rectifier-block — imgbb.com

Last edited by Torstensson; 14th August 2019 at 02:12 PM.
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Old 14th August 2019, 02:19 PM   #78
6L6 is offline 6L6  United States
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diyAudio F5 Build Guide
Your list looks good.

Very nice transformer. You could use 300 or 400VA to save some room and money, having an oversize transformer actually doesn't gain much.

From what suppler are you buying PSU components? I can point you in the proper direction for the bridges, or here's a good example from Mouser -

GBPC3502 ON Semiconductor / Fairchild | Mouser
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Old 14th August 2019, 02:31 PM   #79
Torstensson is offline Torstensson  Sweden
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Join Date: Oct 2012
Thanks for the quick reply.
Saw even bigger transformers in other build so kind of settled for this one. Will take a look at the price difference for a smaller one. Thanks for the link to the bridges form Mouser.

At the moment I'm looking for a good store for components. Recommendations would be awesome, preferably in EU but not necessary.

Last edited by Torstensson; 14th August 2019 at 02:39 PM.
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Old 14th August 2019, 02:47 PM   #80
6L6 is offline 6L6  United States
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diyAudio F5 Build Guide
My first F5 used a 600VA. I didn’t know any better at the time. It doesn’t hurt anything, but gains essentially nothing.
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