Concerning equipment, maybe some could help. This is an old multi-meter which many old timers (like me) will be familiar with. Received mine in the mid 70,s from the company I worked for and has been a work horse ever since.
It decided it didn't want to work on the basic ohm scale so after checking batteries took it apart and found a resister open so I removed it and now I need to identify it and maybe someone could help. It's a blue resistor and is about the size of an old 1/2 watt and has a set of numbers 4014 and the next line 9R0 and is a 0.5%
I have looked for a schematic and the one I found doesn't share any info on this resistor.
Many thanks for any help.
Dave...
It decided it didn't want to work on the basic ohm scale so after checking batteries took it apart and found a resister open so I removed it and now I need to identify it and maybe someone could help. It's a blue resistor and is about the size of an old 1/2 watt and has a set of numbers 4014 and the next line 9R0 and is a 0.5%
I have looked for a schematic and the one I found doesn't share any info on this resistor.
Many thanks for any help.
Dave...
Ah yes!
The AVO8!
The finest analogue multimeter in the world!
Some pictures would help, or even if you could point it out maybe?
AVO model 8 universal multimeter
http://www.richardsradios.co.uk/avometersdata.html
The AVO8!
The finest analogue multimeter in the world!
Some pictures would help, or even if you could point it out maybe?
AVO model 8 universal multimeter
http://www.richardsradios.co.uk/avometersdata.html
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Mine is a Mk6 but I can check anything if you want.
9R0 is 9 Ohms so would get a suitable power rating 9Ohm and put it in there.
Looking at the circuit diagrams on the linked pages the mk3 manual isn't that helpful, but the Mk4 clearly shows a 9 Ohm resistor at R7 that would certainly kill resistance measurements!
9R0 is 9 Ohms so would get a suitable power rating 9Ohm and put it in there.
Looking at the circuit diagrams on the linked pages the mk3 manual isn't that helpful, but the Mk4 clearly shows a 9 Ohm resistor at R7 that would certainly kill resistance measurements!
Great, thanks Bill, 9 ohm it is, will work on getting one.
Yes Mosfet, I wouldn't trade it. Use to spend my summers in Worthing with parents...
Yes Mosfet, I wouldn't trade it. Use to spend my summers in Worthing with parents...
I'm not far from Worthing...
Did you get your AVO fixed?
You can date them from the meter scale; bottom RHS will be a number, something like 12345. 1067
Last three (or four) digits are month and year, hence, October, 1967, (etc)
Did you get your AVO fixed?
You can date them from the meter scale; bottom RHS will be a number, something like 12345. 1067
Last three (or four) digits are month and year, hence, October, 1967, (etc)
Back in the 50's we went to Worthing for two weeks in July, if I remember correctly was the best two weeks weather-wise of the year, often it was raining when we arrived.. lol
Trying to find a 9 ohm resistor without spending $8 s&h. I sense a road trip soon. 667, June 1967.
Trying to find a 9 ohm resistor without spending $8 s&h. I sense a road trip soon. 667, June 1967.
9r0 is not a standard value.
But you could use a 10r and pad it down to 9r0.
10r||91r = 9.00990099 ohms.
That is only 0.11% high and the tolerance you have stated is +-0.5%.
But you could use a 10r and pad it down to 9r0.
10r||91r = 9.00990099 ohms.
That is only 0.11% high and the tolerance you have stated is +-0.5%.
Thanks Andrew, good point. I'm not quite sure where this is in the ohm scale circuit but if it's only resistance measurement, these days for what I do .......I don't need it that accurate anyway. I'll get it as cloase as I can ....Dave
I have an original AVO manual for the MkIII, I've just had a look at it, and I can't see any 9R0 resistors on the circuit diagram, or the parts list.
Where abouts is the resistor?
Do the amps and volts ranges work ok?
**EDIT**
Just found this manual, R32 is the one.
http://earlywireless.com/pdf/AVO 8 mk III.pdf
Where abouts is the resistor?
Do the amps and volts ranges work ok?
**EDIT**
Just found this manual, R32 is the one.
http://earlywireless.com/pdf/AVO 8 mk III.pdf
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