WG4900 need CRT tube numbers please 25"

dezbaz

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Hi Guys

I scored a 25" WG4900, and the numbers on the CRT have rubbed off a bit

I thought I read A63JBG20X (closest match to the setup book anyway)

Can someone please tell me what the tube numbers are on their WG4900's please (I am hoping I have a med res tube)

Thank you
 
First off, it's not a K4900. The 25" version is called the K5500.

Now, whether you have the standard-res version (K5501) or medium-res version (K5515) is simple - measure the ohms on the vertical yoke (green and yellow wires). If it is about 38 ohms, then it is standard-resolution. If it is about 44 ohms, then it is medium-resolution.

There are ways to check parts on the actual chassis to find out if it's matched with the proper yoke, if you're worried about that. If so, let me know and I'll get more specific...
 
On the left side of your pic, you'll see a small board mounted on top of the side wall. Under that, there will be a linearity coil mounted to the side wall. If that coil has the number 9A2813-006 on it, then it is med-res...
 
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