Re: [softrock40] Re: Problems at Ensemble RXTX RF I/O Switching Stage
- On 5 Feb 2013, at 05:27CET, Jasmine Strong wrote:
>Agreed. Even reputable suppliers have been known to get it wrong (47k when 43k was ordered).
> Use a multimeter! Never trust a resistor, they're shocking liars.
- Being color-blind, I ALWAYS follow my instruction to use the Ohmmeter vs. the color code. The only use I make of the color code is (with my XYL's assistance) to initially sort out the resistors into like stacks.
On Mon, Feb 4, 2013 at 10:26 PM, jwrobles <jim.wrobo@...> wrote:
Robby and Alan,
You are men of genius! Thanks, old eyes had a hard time distinguishing between red and brown.
Jim> On Mon, Feb 4, 2013 at 1:31 AM, Alan wrote:
--- In firstname.lastname@example.org, "R. R. (Robby) Robson" wrote:
> If the 5v rail is at 5.02V, then, if R61 = 1k Ohm and R62=100 Ohm, you
> would get approximately the result you have mentioned. Check R62; compare
> its color code to R61
> > **
> > ----- Original Message -----
> > Subject: [softrock40] Problems at Ensemble RXTX RF I/O Switching Stage
> > > Two problems reared up at the RF I/O Switching stage..
> > >
> > > 1) My current draw is 4.56 mA, not near the 20 mA. Yes I'm under but is
> > under by so much a problem?
> > >
> > > 2) I get double the voltage, or 4.56V at r62, r53 and r54 testing
> > between those points and the Q5,7,8 ground pad.
> > >
> > Jim,
> > 1) I am not sure, it can vary. The main thing is whether all the voltage
> > readings are correct. Did you have USB connected?
> > 2) Robby says "R61 and R62 form a voltage divider off of the 5 volt rail."
> > So are they the correct values in the correct position
> > and soldered well?
>--Cheers,RobbyRichard R. (Robby) RobsonLTC USA (RET)
- Trying to determine red from brown on a blue background will make you
think you are colorblind, for sure!
John - ke5ssh
On 2/5/2013 7:33 AM, R. R. (Robby) Robson wrote:
> Being color-blind, I ALWAYS follow my instruction to use the Ohmmeter
> vs. the color code.
KE5SSH - ham since 2007
WQKA523 - GMRS for family use on the farm