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Hackcell

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Hello,

My candy cab comes with a 220v, CGA chassis. In the process of finding a 120V chassis, I found the tube (Samsung a68kvl74x02) supports 15, 25 and 31khz, nevertheless, to be capable of doing that, it requires a wei-ya C31291A chassis, which is no longer available.
Attached the specs of this chassis:
  • H.Frequency: 3-mode (15/24/31khz)
  • V.Frequency: 47~70hz
  • Video Input: TTL 2.5~5.0Vpp / Analog (75ohm) 07.Vpp
  • Sync: TTL 2.5~5.0Vpp Negative/Positive (separate or composite)
  • Resolution & Bandwidth: 640x480, 65mhz

Given this info, what would be a good chassis replacement ? I really want to take advantage of the 31khz for Naomi games.
Thanks!!
 
You need to measure the yoke. Tube is inconsequential.
yellow/green returns between 7.8 and 7.9 ohm
red/blue returns 1.1 and 1.4 ohm
 
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You really need to measure inductance with a LCR meter.

The fact that your horizontal resistance doesn't show an exact number means your multimeter doesn't work well with very low resistance (≤ 1 ohm). I'm guessing it also has maybe 0.3-0.4 ohms of internal resistance. You can test this by touching the meter leads together. You need to subtract that from your results.
 
You really need to measure inductance with a LCR meter.

The fact that your horizontal resistance doesn't show an exact number means your multimeter doesn't work well with very low resistance (≤ 1 ohm). I'm guessing it also has maybe 0.3-0.4 ohms of internal resistance. You can test this by touching the meter leads together. You need to subtract that from your results.
I think this meter should measure both things...

https://www.amazon.com/5000-Handhel..._2?s=industrial&ie=UTF8&qid=1554479735&sr=1-2
 
Below the measures:

yellow/green 7.8 ohm @ 18.5mH
red/blue 1.2 ohm @ 0.79mH
 
Well, I can say that no Japanese chassis will work with that yoke. I don't know about American or European ones.
 
This tube normally fitted with a MS9-29s isn’t it? It’s a
  • SAMSUNG A68KVL74X02
just realized I think. Is this from an atomiswave cabinet?
 
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Below the measures:

yellow/green 7.8 ohm @ 18.5mH
red/blue 1.2 ohm @ 0.79mH
What yoke is it the DSM-2912AL?
Nanao ms8 fan 29"

Lh0.355mh
Lv18.7mh
Rh1.0 ohm
Rv7.9ohm



Sanwa pm1745 29"

Lh0.405mh
Lv18mh
Rh0.9ohm
Rv8.5ohm

 
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