In preparation for building the second stage
of Carl Blare's Big Talker 13.560 MHz Part
15 transmitter, I started digging up the parts
I needed.
In preparation for building the second stage
of Carl Blare's Big Talker 13.560 MHz Part
15 transmitter, I started digging up the parts
I needed.
The buffer stage I am going to build needs about
5 or 6 resistors, which makes sense.
I went out to "The Electronics Store That is Everywhere,"
a while back, and picked up a gigantic bag of assorted
resistors.
Yikes! In testing these resistors on the OHM meter, I
have come up with some really weird values, that do
not seem like the resistor values that I have been
familiar with all of my life.
Has this happened to anyone one else? Are these assorted
resistors rejects or something, or am I just loosing my memory?
Any comments?
Best Wishes,
Bruce, DRS2
You have probably already taken this into account, but I want to be sure you check your meter with resistors you know and trust, then check the new assorted resistors and make note of how far their actual reading is from their color coded value.
Make a report here of every resistor.
Grab bags of resistors usually will have a wide range of tolerances as well as values. It is not uncommon to get a bag full of values not found in common. Odd ball values used in special designs calling for special values usually end up being in surplus, thus get tossed into grab bag deals.
Feel fortunate that you got a bag full of odd ball values that otherwise would be impossible to find, and be quite valuable too.
RFB
Thank you RFB and Carl.
Actually, I have not checked
the accuracy of the digital "VOM."
I'll have to check that, and look
at the values of some of the
resistors in the grab bag, and see
what they really are, as opposed to
what they test out to be.
These are all 1/4 watt types. For
something like a buffer stage, I
am making the assumption that they
are all OK for this purpose. When I
get it going - if anything destructs
or smokes, i will just chalk it up as
a learning experience.
As you know, I have to do these things
slowly, so don't hold your breath.
Thanks again!
Bruce, DRS2
I have taught myself to go slow, like when I did the AMT5000, because I had read the scary news that a member installed a part backwards and needed PhilB to fix the mistake, which of course Phil did.
Even going slow results in mistakes, like when I used a resistor that had the same colors as a 1k resistor, but I did not notice the colors were in a different order, and for a long time the Radio8Z buffer would not work. Finally I discovered my error.
I totally dismantled the experimental parts for the 13.560 Big Talker so they could be mounted in a cabinet, and everyday I look at the box of parts and think that maybe I should trim the shrubbery first, or repair a pipe under the sink, or write my memoirs.
Procrastination is the greatest nation in the world.
You stand back, look at the undone heaps, and you say to yourself, "I have a future."