F5 construction pics

[thunk303]

Hey guys.

I have ordered my F5 boards from CVILLER (v2.0) and a standard parts kit from TECHDIY. Thank you to both for great products delivered quickly to Aus.

I found some time ago a thread at AUDIOKARMA with step by step construction pics that I just cant find again...

Does anybody know this thread or have any pics that might be of help.

My electronics skills just aren't enough to inspire confidence without checking it against somebody else's.

I would appreciate any pics / links / advice and hope I haven't created a repeat thread. I just cant seem to find any pics of these particular boards populated with parts.

Cheers all.
Dean

[juma]

"Search" button can do wonders for you...

[Zen Mod]

look for Cviller's blog here

[thunk303]

Heres a few pics of parts I have installed so far and a blank board for reference.

I have a funny feeling I have the trip pots around the wrong way, that could be exciting>!

Dean

[thunk303]

Hey guys, cheers for reading and replying.

I am really not trying to be annoying but my boards don't look like the ones in CVILLERS blog:

http://www.diyaudio.com/forums/blogs...version-2.html

Do you have a link to a pic of my boards loaded with parts?

Cheers again.
Dean

[thunk303]

Thanks Juma, I never tried that, appreciate your input.

Dean

[wintermute]

Hi Dean,

provided the centre pin on your trimpots is the wiper (and I think it would be very unusual for it not to be) it shouldn't matter which way around you install them which ever way is more asthetically pleasing to you should be fine

The things you need to worry about getting the wrong way around are electrolytic caps, diodes and transistors!

Tony.

[thunk303]

Hey Tony.

It seems like there's plenty of photos of cvillers boards with the 4 transistor setup but not the 2 transistor boards that I received from from the diyaudio store.

Your advice regarding the trimpots makes sense.

Cheers
Dean

[wintermute]

Hi Dean, can't help with the F5 pics I'm afraid, but the trickyest thing I always find is the transistors. Working out which of the pins is emitter collector and base (or gate source drain in fets) is always an issue as they are rarely if ever marked on the packages.

Referring to the datasheet for the particular manufacturer of the devices you have is recommended (sometimes the same model transistor eg a bc548 may have different pin assignments depending on the package or manufacturer). For Bi-Polar transistors I allways check them by putting them into the hfe tester on my multimeter to ensure I know which pins are B C and E before inserting them into the board even when I've checked the datasheet! I guess the main reason for mentioning this is that pictures of an assembled board may not be the best guide as to component orientation as transistors can and do vary in the pinouts!

Tony.

[AndrewT]

Originally Posted by wintermute

provided the centre pin on your trimpots is the wiper (and I think it would be very unusual for it not to be) it shouldn't matter which way around you install them which ever way is more asthetically pleasing to you should be fine

a three in line trim pot can be inserted either way around.

One will result in increasing resistance as the adjustment is advanced clockwise.

The other installation will result in the resistance decreasing as the adjustment is advanced clockwise.

The PCB traces will determine which option you want. I would make sure that all 4 trimpots are installed so that clockwise rotation makes the same resistance change. And stick a label inside the cover to remind you what clockwise does !