FirstWatt F3/ F5 Clone GB

[wct]

Hello Suds

Just curious, is this Group buy still active?

Are you shipping boards?

Anyway, I'm looking for a set of boards including power supply for the F5.

If available, please advise how to order and latest cost including shipping (to USA).

Thankyou very much.
Curt

[mastertrash]

Me too -- Please let me know if these are still out there.

[wct]

Well while Im asking qustions

I know I want to build an F5, but I have no idea what the differences are between the various F5 group buy boards.

There must be a reason why there are different pcb variants of the same circuit are out there.

But I cant find the answer in the multi hundred page theads.

Can someone in very baisc terms summarize the differences?

Best regards

Curt

[tms0425]

Originally Posted by wct

Well while Im asking qustions

I know I want to build an F5, but I have no idea what the differences are between the various F5 group buy boards.

There must be a reason why there are different pcb variants of the same circuit are out there.

But I cant find the answer in the multi hundred page theads.

Can someone in very baisc terms summarize the differences?

Best regards

Curt

I have both and either one is outstanding.

Peter's boards fit the same form factor for Mosfet spacing (up to 6 per board 3+3 or 2+2) as his previous boards F4, etc. so they are interchangeable on the heatsinks. Resistors are smaller spacing unless you set them upright.

CViller's board allows for wider resistor lead spacing if you prefer to place them flat (axial) on the PCB. I've put PRP's on CViller's and tiny Dales and Vishays on Peter's. It was also no problem putting PRP's vertically on Peter's F4 boards.

Tom

[suds]

Hi,

My F5 Board design is based on Nelson Pass F1 / F3 Boards, I have kept all Board same dimensions. There is no change in schematic, Values, only Layout differ from original ones.

GB is Active.. have some boards left , getting new F5 Boards too..

Type 1 : 1.6mm PCB, HAL Lead Plated, 70micron copper, Silk Screen and Solder Mask

Per Stereo Set : (2 x Amp PCB, 1 x PSU PCB) = $24 Plus Shipping. ( $28 Shipping for 1 Set)

===========

Type 2 : 2mm PCB, Gold Plated, 70micron copper, Silk Screen and Solder Mask

Per Stereo Set : (2 x Amp PCB, 1 x PSU PCB) = $45 Plus Shipping.

Shipping will be $28 ( $28 Shipping for 1 Set) onwards, depending on Qnty,

Payment : Paypal

Mail me for Details : sudhirmt@gmail.com

[suds]

All Sets, PCB's are designed specifically for Left and Right Channel (separate PCB), marked as Side A and Side B. ( Not single PCB for Both sides)

[vitalica]

Hi Suds,

I installed all components from you PCB , but I have a problem .
I can not find how to make adjustments to F3 ...
Please help my

Thanks!

[suds]

Hi,

for F3 I did not get components of correct values, used near values.
and about adjustments, I adjusted the pots after around 40minutes of burn in, I have only multimeter, so I just listen and adjusted ..

[vitalica]

Thanks Suds

Regards,
Vitalica

[Dzius]

Picture of F3 PCB looks fine, but I,ve got a question. How Q1 LU1014 is suggested to be attached to radiator ? From the very first picture looks like it upside down relatively to the Mosfets, so have to be fixed to the radiator differently.