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Gb: F5 Pcb

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cviller

cviller

Member
Joined 2005
Thanks! :D

Looking forward to hear from people who have received boards most of the europe boards have had a couple of days on the road by now....


I have now updated the wiki. If you have MAIL something written in the status field, then I'm only waiting for your address - yes I know this is kinda double work, but I want to get confirmation for the number of boards as well.


I still have extra boards available (please give me confirmed shipping information right away.)
 
noelectrix

noelectrix

Member
Joined 2006
hope i can get immediate help here:eek:

my source resistors do measure 0,6 ohms instead of 0,47 ohms. The rings do lable them as 0,47 !

so can i use them and set the voltage across them just a bit higher to get the right bias? Or do I have to search ore suitable ones?

tnx
stefan

(if question s…ks here, gimme a hint)
 
Tea-Bag

Tea-Bag

Member
Joined 2006
Paid Member
noelectrix said:
hope i can get immediate help here:eek:

my source resistors do measure 0,6 ohms instead of 0,47 ohms. The rings do lable them as 0,47 !

so can i use them and set the voltage across them just a bit higher to get the right bias? Or do I have to search ore suitable ones?

tnx
stefan

(if question s…ks here, gimme a hint)
Click to expand...



< 5 ohm resistors don't measure well with most DMM.
Most of mine will measure .6 ot .7ohm.

I would assume they are good and stick with .6v.
 
noelectrix

noelectrix

Member
Joined 2006
cviller said:
You're right except for the multiplication... should be 780mV!
Click to expand...


:hot: :hot: :hot: :hot: yes that what i meant. Dont try this at home:)
It is stuffed, completet exept the trannies led and R35.
Idon´t need R35 and the led to run it, right?

I have to go to an exhibition in 2 hours, and so I won´t finish it today. It was a pleasure to solder that thing.

Did I mention it anywhere… thanks a lot

stefan
 
cviller

cviller

Member
Joined 2005
Tea-Bag said:




< 5 ohm resistors don't measure well with most DMM.
Most of mine will measure .6 ot .7ohm.

I would assume they are good and stick with .6v.
Click to expand...


I think you're right.

Noelectrix, if you want to be absolutely sure, you could measure the rail current with your meter (if i has that option), and then you can see what the corresponding voltage is. You might discover that everything is all peachy! :D

EDIT: The led is completely optional, but if you have a LED and a >20k resistor, then just put it in for testing.
 
steenoe

steenoe

Member
Joined 2004
noelectrix said:
hope i can get immediate help here:eek:

my source resistors do measure 0,6 ohms instead of 0,47 ohms. The rings do lable them as 0,47 !

so can i use them and set the voltage across them just a bit higher to get the right bias? Or do I have to search ore suitable ones?

tnx
stefan

(if question s…ks here, gimme a hint)
Click to expand...

How did you measure that? A cheap DMM can't measure so low a value precisely;) I bet that they are in fact 0.47r.
You have to send some voltage through them, and measure the voltage drop across them, if you want them to be precise. Ohm's law rule!. A DMM is much better at measuring voltage ;)

:)
 
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