#16
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I have a 2 manuals for RCA Senior Voltohmsyts - one is for WV-98C and one is for a WV-98A. They came with some other older equipment I bought, but these items weren't there, just these manuals.
So I don't need them - if someone else does, just let me know. |
#17
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Quote:
It has a mode switch for DC / AC, Ohms. The switch puts a 1M resistor in series with the tip. |
#18
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Oh ok. So that is why the meter seemed off on DC voltages. Looks like I may just make a box with the switch and resistor. I would then use shielded cable to go from the connector to maybe a BNC connector on the box then have the switch and resistor along with two banana jacks so that I can use regular meter leads.
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Main system Scott LK-72A amp & LT-110 tuner Garrard Zero 100C turntable AKAI GX 255 RTR iPod & computer DIY speakers (upgrading them soon) |
#19
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How to disassemble a VoltOhmyst Probe WG-299D
Hi:
I have fully restored my RCA SENIOR VOLTOHMYST WV-98C. It had a few out of tolerance precision resistors. Thanks to banderson's tip to use a parallel resistance calculator from the internet I was able to adjust these back to within 1% tolerance. The problem I have now is the 1Meg ohm resistor in the WG-299D probe is out of tolerance. I have no idea how to disassemble this. I twisted it like crazy. Any harder I think it would break! The other thought is this. Since it is about 10% out, does it really matter anyways when I come to the point of calibrating the meter? In other words would calibration overcome this out of tolerance value? Any experience? Any ideas? Thanks |
#20
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I assume that those precision resistors are not available new? I may check mine and start replacing resistors. Concerning the resistor in the probe could you just make a new probe with a new resistor? Unfortunately mine has no probe so I would have to make one.
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Main system Scott LK-72A amp & LT-110 tuner Garrard Zero 100C turntable AKAI GX 255 RTR iPod & computer DIY speakers (upgrading them soon) |
Audiokarma |
#21
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Generally they're not available new or if they are, they're very expensive. Surplus Sales of Nebraska has some at reasonable prices though.
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#22
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True I didn't think about that.
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Main system Scott LK-72A amp & LT-110 tuner Garrard Zero 100C turntable AKAI GX 255 RTR iPod & computer DIY speakers (upgrading them soon) |
#23
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1 meg precision resistors are EASY to find new, and are inexpensive up to about a watt. I recently got some 10Meg 1 Watt bleeder resistors for under a buck each. Mouser, Allied, Digi-Key, and Newark all have them, as do several surplus vendors as Bob mentioned. Talon has them from 1/8 Watt to 1 Watt, all under a buck each:
http://www.talonix.com/shop/category...page=4&sortby= Cheers,
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Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
#24
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Mouser has just about any resistor you could want or need. I only have had maybe one case where they did not have one resistor I needed and I sometimes need some weird values.
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Main system Scott LK-72A amp & LT-110 tuner Garrard Zero 100C turntable AKAI GX 255 RTR iPod & computer DIY speakers (upgrading them soon) |
#25
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Quote:
Cheers,
__________________
Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
Audiokarma |
#26
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Hmm. I like Mouser and use them all the time but couldn't find any 7M resistors. The closest are 6.98M or 7.15M and neither at 1 W I guess I'll try Surplus Sales of Nebraska next time I need enough to build up a full order.
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#27
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I scored an rca senior voltohmyst for free!
A friend had two of them beqethed to him and one had a stuck needle so he offered it to me. I admittedly know little of electronics, but mechanics I like, so I took it apart right away.
The probe attaches right in the middle of the coil that operates the needle, and with a minor adjustment (a couple screws) it bounces about as nice as if new (I can only imagine, since I was probably born when this thing was)! Anyhow, now I have the bug to use it - is this a nice tool to welcome me into electronics? And geartech - do you still have an extra copy of the manual for this? Anyone have a digital copy? |
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