Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

RCA WV-98c
#1

I have a wv98c and it looks like the meter is roached. Needle wont move. I applied a small voltage thru a pot and resistor and it wont move. Can the movement be taken apart?


Attached Files Image(s)
   
#2

Your power supply's ammeter is, obviously, coarse and might not see a small current.
Put an ammeter in series, and see if any current at all flows. If not, there is an open somewhere, possibly inside the meter.
Many old ones could be taken apart, but I am not familiar with this one. See if tehre are screws holding things together.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#3

I balanced the movement. Micro surgery. Like working on a watch. While iam in the machine should i replace these brown caps?

https://www.dropbox.com/scl/fi/1lrg7d1dz...g39h7&dl=0


Attached Files Image(s)
   
#4

Think yes.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#5

To fix the movement properly you need to glue the magnet to the bracket. They used junkie glue from the factory.


Attached Files Image(s)
   
#6

So i put it back together, replaced the only electrolytic cap, the ohms feature works but on DC + volts, it pegs the meter to the right. Any thoughts?


Attached Files Image(s)
   
.pdf wv98c_sch.pdf Size: 153.27 KB  Downloads: 22
#7

Check the schematic.
And the idea is pretty simple: if you peg it to the right, you put too much current through it.
Work from there.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#8

I will check out resistors R23, R27 and R28.
#9

I only see one R23 resistor. The schematic shows two.


Attached Files Image(s)
   
#10

Can you put PDF of the sch here, or the link to it?

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#11

Here is the schematic


Attached Files Image(s)
   
#12

Are there any paper capacitors, or only disc ceramic ones?

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#13

Disc and polys.
#14

Can you highlight the circuit that is set by switches and leads when it measures DC volts?

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#15

Thats the hard part and what i need. .5 thru 15vdc i cant get the pot to zero the meter. Higher voltages are ok




Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
Shadow Meter Bulb
I think after all has been said, I will use the same bulb that is specified for the dial pilot light which is a #55. I ...georgetownjohn — 07:31 PM
12' Philco
There was also this Philco! klondike98 — 07:25 PM
HiFi (Chifi) tube amp build - but my own design.
I expected a challenge and this is just part of it. But, it's also supposed to be fun, entertaining, informative and enj...TV MAN — 07:12 PM
Shadow Meter Bulb
Butting in here with a question. Since the shadow meter is connected directly to the 1st and 2nd I.F.'s wouldn't the met...RossH — 06:43 PM
HiFi (Chifi) tube amp build - but my own design.
Mike, Tim; you are about to enter the twilight zone. Doo doo doo doo, doo doo doo doo This is something alright. I'm go...RodB — 06:26 PM
HiFi (Chifi) tube amp build - but my own design.
:lol: We need to start a singing radio group! I play the guitar, so maybe get a few vocals? Anyways, Mike, I did try mou...TV MAN — 05:56 PM
HiFi (Chifi) tube amp build - but my own design.
And so does a barber shop quartet. mmmmmmRodB — 03:54 PM
Shadow Meter Bulb
I did try an LED bulb in place of the original but wasn't impressed with the amount of light on the dial. Seems like it ...RodB — 03:51 PM
HiFi (Chifi) tube amp build - but my own design.
Tim Would mounting he transformer vertically change the hum, if used without additional parts? Also, in these amps...morzh — 02:25 PM
Shadow Meter Bulb
Gary I doubt it would introduce any noise. We use similar lamps for the panel indication, 12V AC lamps: they are LEDs...morzh — 02:15 PM

[-]
Who's Online
There are currently 5730 online users. [Complete List]
» 1 Member(s) | 5729 Guest(s)
Avatar

>