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diyAudio F5 Build Guide
diyAudio F5 Build Guide
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Old 1st November 2018, 09:59 PM   #51
Trismos is offline Trismos  Canada
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Which came today!

Okay, honestly - I looked and searched on how to post an image here. Would someone be so kind as to elucidate? Do I need to have a Flickr account or some such thing?

Thx
D
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Old 2nd November 2018, 02:23 AM   #52
Trismos is offline Trismos  Canada
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Quote:
Originally Posted by 6L6 View Post
Linear Systems Matched LSJ74/LSK170 JFET pairs (Grade B) diyAudio Store

Deluxe 4U Aluminum diyAudio Store

F5 diyAudio Store

Universal PSU diyAudio Store

AS-3218 - 300VA 18V Transformer - AnTek Products Corp

Currently the back panel parts kit and the PCB kit is out of stock, however all that is available at other sources, and you need wire, a few bits and pieces and PSU components anyway, so you'll need to order things from an electronics distributer regardless.

Basically speaking, the Jfet are currently available, so you can build one.
6l6 - a few questions: I am building the F5 and was looking at this Cap :https://www.mouser.ca/ProductDetail/...rd0RlFeA%3d%3d
Satisfactory?
Also, I can't tell from your build guide which diodes you are using though you mention the TO 220 package... I don't suppose you have a Digi_key or Mouser prt#? There seems to be alot of variations.

One more comment - your build guide that is linked to in the DIY Audio Store for the PSU has a number of img links that just take us to the archives general page. How do we find the actual photo referenced? There are quite a few that you make comments about but of course we can't see the pics now.

Thx much

Dave
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Old 2nd November 2018, 02:46 AM   #53
Trismos is offline Trismos  Canada
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My apologies but I appear to be discussing the PSU for the F5 in an F5 build guide reference. Please ignore if this is not the right place for this.

Dave
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Old 2nd November 2018, 04:04 AM   #54
6L6 is offline 6L6  United States
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diyAudio F5 Build Guide
Firstwatt F5 amplifier v3 - diyAudio Guides

As for the PSU page, yes, sadly many of those links are corrupt.

Your capacitor looks good.

Last edited by 6L6; 2nd November 2018 at 04:48 AM.
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Old 16th November 2018, 01:09 PM   #55
jphabc54 is online now jphabc54
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Quote:
Originally Posted by 6L6 View Post
Firstwatt F5 amplifier v3 - diyAudio Guides

As for the PSU page, yes, sadly many of those links are corrupt.

Your capacitor looks good.
It appears that a few resistors as installed in the pictures in this build guide do not align to the schematic. For example, I think R13/R14/R17/R18 are 100R in the schematic, but it appears that 1K resistors are installed in this build guide. Is there a reason to adjust the values of those resistors (or am I reading this wrong)? Will be good to know since I'm in the middle stuffing my F5 amp boards. Thanks!
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Old 16th November 2018, 01:39 PM   #56
6L6 is offline 6L6  United States
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diyAudio F5 Build Guide
Dale/Vishay RN and CMF series are three-digit with multiplier in the 4th place.

If the value printed on the side reads 1000, it is 100 ohm with 0 zeros behind it, or 100 ohm.

1001 would be 100ohm with 1 zero behind it, meaning 1k

1002 is 10k, 1003 100k, 1004 1m, etc...

Sub-100 ohm have an “R” in the decimal. 10R0 is 10.0ohm
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Old 16th November 2018, 01:40 PM   #57
Dennis Hui is online now Dennis Hui  Canada
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diyAudio F5 Build Guide
Those are 100 ohm resistors; for the Vishay RN series resistors the last digit is
a multiplier. Thus "1000" is actually 100 x 10^0 = 100 ohms.

Hope this helps.

Dennis

Edit: I see 6L6 has already answered.
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Old 16th November 2018, 01:41 PM   #58
jphabc54 is online now jphabc54
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Quote:
Originally Posted by Dennis Hui View Post
Those are 100 ohm resistors; for the Vishay RN series resistors the last digit is
a multiplier. Thus "1000" is actually 100 x 10^0 = 100 ohms.

Hope this helps.

Dennis
Thank you both for the quick clarification! I know 6L6 had explained that in the build guide and I still missed it. Thanks as always for being such great (and patient) resources.
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Old 5th December 2018, 06:15 AM   #59
Jason is offline Jason  Australia
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diyAudio F5 Build Guide
Quote:
Originally Posted by Trismos View Post
One more comment - your build guide that is linked to in the DIY Audio Store for the PSU has a number of img links that just take us to the archives general page. How do we find the actual photo referenced?
Bit of a mess, will be fixed in the future. In the meantime, you can try to salvage the images you are after from this archive:

6L6 Gallery - My Photo Gallery

The PSU photos start here: 6L6 Gallery - My Photo Gallery
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