F3 and F4 Clone PCB Reissue group buy, also F5 PCBs

[samsagaz]

Thanks Fran.

F4 PS board will also work with F3; you just need to reverse wires from bridges and install caps accordingly.

Hey Peter, sorry ask this offtopic question but wich are the thickness of the aluminium that you use in your proyects?

how you cut it? have some thread where you talk abt how works with that alu?

Thanks in advance

 

[Peter Daniel]

I use 1/8, 3/16, 1/4 and 3/8" aluminum and cut it on table saw using non ferrous metal blade from Freud.

Some info was posted in this thread: http://www.diyaudio.com/forums/showthread.php?s=&threadid=3981&perpage=20&highlight=&pagenumber=1

 

[samsagaz]

Thanks again dude You are great!

 

[samsagaz]

Q2, Q3, Q4 and Q5 from F3 Amps, need to be matched? or i just can order it from any store?

About LU1014 Some other place to order it?

I contacted a few minutes ago to XaudioX, will try to see if he still have in stock

 

[samsagaz]

One More about Leds. In F3 say that need to use 1.6v led, i was searching some blue leds and are all rated like 3v, so is not possible to use 3v leds?

 

[sekess]

Freudian Blade

Hey Peter,

1. Is this a specialty blade? I'm not familiar with Freud. Should most well stocked home centers carry it?

2. Do you lubricate the aluminum when you make the cuts? Or, just cut it dry?

Thanks,
Steve

 

[Peter Daniel]

You can find it at Home Depot: http://www.homedepot.com/webapp/wcs...langId=-1&catalogId=10053&productId=100043779

I never lubricate, but it could certainly help with thicker stock. Sharp blade will cut aluminum same way as hardwood. You need to wear safety glasses or face shield.

 

[sekess]

blade

Thanks Peter,
I've been looking for a good method of cutting aluminum.

Steve

 

[adn6244]

Peter, do u still have the F4 and PS boards available?

I want to get dual mono ie 1 amp board and 2 PS boards, correct?

plus another PS board for my F5.

total $60 payable. let me know the availability please.

 

[Peter Daniel]

Yes, both F4 and F5 boards are still available, same for PS pcbs.

 

[chrismercurio]

I know the F3 supply is slightly different. Can the F4/5 supply run the F3?

Chris

 

[samoloko]

I am going to purchase F5 kit from tech-diy to use with Peters pcbs
they got two sets - F5/FAIRCHILD Kit for Q3 and Q4 and - F5/VISHAY-IRF Kit
what do you recommend to use for better sound
also Is It the only problem with these pcbs the radial power transistor and bending the trim-pots

 

[Diomedian]

I am going to purchase F5 kit from tech-diy to use with Peters pcbs
they got two sets - F5/FAIRCHILD Kit for Q3 and Q4 and - F5/VISHAY-IRF Kit
what do you recommend to use for better sound
also Is It the only problem with these pcbs the radial power transistor and bending the trim-pots

Mr. Pass uses the Fairchild parts as the IRFP9240 suffers from some distortion in this application (however others have noted that it's not severe or even noticeable in most cases).

As far as I know these are the only problems with the tech-diy kit.

-j

 

[Peter Daniel]

also Is It the only problem with these pcbs the radial power transistor and bending the trim-pots

The radial resistors should fit, as well larger power resistors. The trimpots should have pins in line, but it's very easy to modify.

 

[Peter Daniel]

I know the F3 supply is slightly different. Can the F4/5 supply run the F3?

The only difference between those PS boards is that one is symmetrical (F4/F5) the other dual positive (F3). If you don't use resistors between the caps (for CRC filtering), it doesn't make any difference.

If you want to use those resistors, for the negative supply, you would need to swap wires from the bridges, install caps for opposite polarity so the resistors would be now in positive "leg" of the negative supply.

 

[RH75]

F3 PCB and PSB board

Is the f3 board still available?

 

[Peter Daniel]

F3 boards are sold out; F4/F5 still available.

 

[samoloko]

The radial resistors should fit, as well larger power resistors. The trimpots should have pins in line, but it's very easy to modify.

thx Peter
seeing your pics there are options when choosing big resistors for F5
which Peter do you prefer

 

[Peter Daniel]

Mills 5W: relatively inexpensive and good sounding

 

[Peter Daniel]

BTW, if using Mills for R5-R8, instead of 4 x 100R you can simply use 2 x 50R (R5 and R6 are not being installed in such case)