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F5Pi - GB for US mosFETs, BoM etc

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woodturner-fran

Member
Joined 2006
Fellow DIYers!


This is to announce a group buy related to the F5Pi (https://www.diyaudio.com/community/...-m2-output-stage-perfectly-integrated.406024/) amplifier and hard to find mosfets for the US version.

The amplifier itself is mostly through hole, but there are some SMD components so those of you who are thinking of opting for this build should be comfortable with soldering 0805 and SOT23 components. This is not a beginners amp, so note that a reasonable level of ability is required.

So there are two options for anyone interested in building the amplifier:

1. You have the gerbers, you have your own jfets and mosfets and so all you need is the paper build guide and BoM (the guide will cover both Toshiba and US mosfets versions). Note that these will be circulated on paper to prevent unauthorised copies. There is a nominal charge for the printing etc, and then non-tracked postage to anywhere in the world for €10

OR

2. You want matched sets of 4x US jfets (MMBF5457/5460) with adapter boards, and 4x mosfets (Fairchild FQP3N30, FQP3P20) along with the build guide. The cost for this is €70 inclusive of tracked and insured postage worldwide.

The Jfets are matched at IDSS, and the mosfets have been measured for Vgs at 70mA and 90mA, resulting in matching for Yfs.


What other devices do I need?
The full BoM will be provided as mentioned above (all other parts are available at Digikey and Mouser etc), but you will also need matched IRFP240/9240. Gerbers are available freely to print your own boards at post #90 of the thread linked above.

What power supply is needed?
Bipolar 24V supply – but there are lots of options here, from a single supply for both channels, to 4x separate supplies for each front end and output stage. The options are too many to list. The front end pulls about 70mA per rail, and output stage about 1.3A per rail at 24V.


At some point later on in the year, it is hoped to offer a full set of boards similar to the amp that is shown in the first posts of the F5Pi thread if there is interest. This incorporates rectifier boards, 4x power supply boards (2 for each front end, 2 for each output stage), auxiliary supplies, front end and output stage boards, and boards for a version of the excellent Relaixed source select and stepped attenuator. Basically, all boards needed to build a fully integrated, end game quality amplifier as per the first posts of the thread.


How do I sign up?
First read the thread linked above – there is lots of information there. It is also worth your while reading the M2OPS thread as well as the output stage is based on this.
If you are still interested, there are a limited number of sets of mosfets we can provide – 20 sets in total. Please add your name to the list below, copying the entire list from post to post as you go. Mosfets are limited to one stereo set per person. Once the GB closes, I will send paypal invoices to all subscribers.

Example:
woodturner-fran - BoM only (so cost to woodturner-fran is €10)
EUVL - mosfets and BoM (so cost to EUVL is €70)

(Copy the list and add your name and which option you want)

Fran
 
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alazira

alazira

Member
Joined 2007
poseidonsvoice - Mosfets and BoM
markus22ch - Mosfets and BoM
Giallograle - Mosfets and BoM
kannan_s -Mosfets and BoM
von Ah - Mosfets and BoM
Vunce - BoM
hirscwi - MOSFETs and BoM
BrianGasberg - BOM
Marcus Halberstram - BoM
alazira - mosfets & BoM
 
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redjr

Member
Joined 2011
poseidonsvoice - Mosfets and BoM
markus22ch - Mosfets and BoM
Giallograle - Mosfets and BoM
kannan_s -Mosfets and BoM
von Ah - Mosfets and BoM
Vunce - BoM
hirscwi - MOSFETs and BoM
BrianGasberg - BOM
Marcus Halberstram - BoM
alazira - mosfets & BoM
redjr - Mosfets and BoM
 
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arthur

Member
Joined 2001
Paid Member
poseidonsvoice - Mosfets and BoM
markus22ch - Mosfets and BoM
Giallograle - Mosfets and BoM
kannan_s -Mosfets and BoM
von Ah - Mosfets and BoM
Vunce - BoM
hirscwi - MOSFETs and BoM
BrianGasberg - BOM
Marcus Halberstram - BoM
alazira - mosfets & BoM
redjr - Mosfets and BoM
Arthur- Mosfets and Bom
 
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angchuck

Member
Joined 2005
poseidonsvoice - Mosfets and BoM
markus22ch - Mosfets and BoM
Giallograle - Mosfets and BoM
kannan_s -Mosfets and BoM
von Ah - Mosfets and BoM
Vunce - BoM
hirscwi - MOSFETs and BoM
BrianGasberg - BOM
Marcus Halberstram - BoM
alazira - mosfets & BoM
redjr - Mosfets and BoM
Arthur- Mosfets and Bom
pinnocchio - Mosfets and BoM
Angchuck - mosfet & bom
 
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Joschl

Joschl

Member
Joined 2005
poseidonsvoice - Mosfets and BoM
markus22ch - Mosfets and BoM
Giallograle - Mosfets and BoM
kannan_s -Mosfets and BoM
von Ah - Mosfets and BoM
Vunce - BoM
hirscwi - MOSFETs and BoM
BrianGasberg - BOM
Marcus Halberstram - BoM
alazira - mosfets & BoM
redjr - Mosfets and BoM
Arthur- Mosfets and Bom
pinnocchio - Mosfets and BoM
Angchuck - mosfet & bom
Joschl - BOM
 
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