Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

VTVM - misaligned, or I need to learn how to read?
#16

since you have it aligned now you'll find yourself using it more and more......

I find it alot easier to see the needle move than to see digits change on the fluke....plus i think it is more sensitive to very small changes in voltage...like when aligning a radio

as far as your switch..i dont know

all the ones I've ever had have a separate lead for AC/OHMS and DC
#17

I think I'd like to have a different one for AC/OHM and DC instead of having a switch that does so. It makes a huge thing about as big as the 10x probe on some scopes, not exactly useful.

I think I could use an old mono jack as a connector and make my own... what's the difference between the two? a capacitor?

-Mars
#18

It's a resistor. Usually 1 megohm. Check the schematic
#19

could I just measure it from my actual probe set?

I am really thinking about making at least two set of probes for it, the bulkiness of the original probe renders it annoying to use. They are a pair of huge alligator clips, I'd rather have actual probes, or at least small alligator clips.

-Mars
#20

You very well could make separate probes for it. My Dad has a later solid-state Heathkit VOM and I believe that it has separate probes for DC and AC/Ohms. You would just have to remember to use the correct probe but it might be easier to remember to switch probes than to switch the switch. Especially if you use two different colored probes.

Sean
WØKPX
#21

Or maybe I would make one that the switch is not ON the probe... it really is annoying because of how bulky it is.

-Mars
#22

There are lots of web-articles describing DYI probes with the 1 MegOhm resistor in the tip for the DC probe. I found a nice kit with good parts all ready-to-go in the Deluxe Heathkit VTVM Probe Kit – Complete kit for 3 Wire Meters V-4/5/6/7A from KK4HXJ through the e-Bay.  The seller is also friendly with advice. Very nice to get my dad's old IM-10 back on the road.
#23

Welcome to the Phorum! KC7HP
Icon_wave
#24

Marsupial

Boy he hasn't posted in a llllllooooonnnnnnnngggggggggg time!!!

Hi Hugh and welcome to the Phorum,
Good to have aboard. Nothing like a good hi z analog meter. These new fangled digital jobs are good for ohms but any voltage w/some rf content it plays with it's head. Years ago I used one to work on a tube type tv and it drove me crazy. Nothing was measuring properly w/it. Welll except for resistance.

de N3GTE

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!

Terry




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM

[-]
Who's Online
There are currently 1558 online users. [Complete List]
» 2 Member(s) | 1556 Guest(s)
AvatarAvatar

>