[Boatanchors] National NC-101X Resistor Value Question and
Wonderings
Freeberg, Scott (STP)
Scott.Freeberg at guidant.com
Tue Mar 7 09:30:41 EST 2006
I have a 101X schematic from Robert Orr's CQ article, and I have a W7FG NC-100 manual which includes a schematic and a parts list. Plus I've reviewed the info on BAMA.
I need to replace the RF gain pot as it has multiple problems such as a break in the element wire in the first 1/2 turn, and missing wire in the other half. The NC-100 parts list shows a 10K RF gain pot. Does the 101X also use 10K? I can't find any documentation that actually says that. I'm guessing the 101X is a 10K also.
Another question. The NC-100 schematic showed 1 fuse, while the 101X has two fuses. IN any case, neither the 100 parts list nor the 101X schematic list the values of the LV fuse. If no one knows, then I'll pull the 4 amp LV fuse that I stuck in there, and measure the operating current, and from that determine a proper fuse value. My only concern is that I won't know for sure if I'm measuring 'normal current' vs some excessively high current. I'd hate to fuse it using an excessive current as a normal condition.... :)
I'm curious. That RF pot is a massive and nice looking pot. The rear cover easily comes off and reveals the wiper and resistive element and all. Maybe the rest of the pot comes apart too. Has anyone successfully rebuilt one of these wire wound pots? I'm wondering if I could rewind the resistive element. I do not know anything about the type of wire which would yield 10K ohms. I hate to pull it out as it contributes to the '1930s-ness' of the receiver :)
73, Scott WA9WFA
More information about the Boatanchors
mailing list