A couple of 15B Questions...

Mark,

I can't help to answer your first question, but am looking forward to seeing the answer as well.  The ones I have been able to buy in the past have not been as big as the original flyer ones I was looking to replace.

But on your second question: I usually cut the old brad with wire cutters to remove it.  The harder part us crimping the new brad, because the ones I have been able to find are much harder than the originals.

Aflyer

Mark, what I found is that the roller disc rolling back and forth is gets worn down. And it gets resistive. A new disk has zero ohms. And worn disk measured and 1 ohm. T the voltage drops thru this one Ohm or so and it gets hot. The top of the transformer case gets hot. If your transformer gets hot on the top and handle is warm replace the roller disk. Buy a disk and the pin.

Thanks.

Yes, as I think I mentioned, the "disk" and "pin" ("roller' and "brad") are ordered and on the way. What I really wanted is a measurement of the physical size of the disk. I hoped to gauge the amount of wear I have by comparing the size of a new disk against the one that's currently on my example.

The windings are in really good shape, and it does not show any signs of "heating" while in use , so possibly replacing the disk may turn out to be not needed at this time.

Mark in (wet) Oregon

Why are you replacing the carbon roller? I have an unused carbon roller. I'll find it and measure it for you. Let you later.

Thanks.

I may in fact not have to, depending on how worn the current roller is. That's where your measurement will help. 

Mark in (now very wet) Oregon

Mark, the carbon roller is. 7/16ths   This is from an clean unused carbon roller.

where do you buy your parts from? I'm in NJ  (it's been raining here all day) I use to buy from if I remember from WashingtonSt. Let me know how you make out.

Thank you for doing that and I will let you know. 

In this instance I ordered the parts off eBay from vendor "rfgco".

Mark in (still wet: it is after all, December) Oregon

Doug Peck is a good parts supplier:

http://64.251.10.24/~worldofw/...age=results-new.html

Aflyer

Indeed; have purchased from Mr. Peck in the past. Great selection and service. 

Mark in Oregon

Milan posted:

Mark, the carbon roller is. 7/16ths   This is from an clean unused carbon roller.

 Let me know how you make out.

Interesting. The new replacement roller arrived today and measures (only) 5/16ths across...

It appears that the existing roller in the 15B is not much smaller, and is working ok, so I guess I will keep it "as is" for the time being; that is, of course, unless any of you have a suggestion. 

Mark in Oregon