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Amp Supply lk500 10 meter parts,
- Thread starter cbkidd1
- Start date
A "T50" toroid core has a half-inch outside diameter. The "-6" refers to the material type that it's molded from.
RF Parts has a T44-6, slightly smaller diameter and a T68-6, slightly larger on this page: https://www.rfparts.com/ferritecores.html?p=1
Only 426 they have are pullouts https://www.rfparts.com/426-p.html
To use a larger or smaller type 6 core may require one more or less turn than the T50 size would need to get the same inductance.
73
RF Parts has a T44-6, slightly smaller diameter and a T68-6, slightly larger on this page: https://www.rfparts.com/ferritecores.html?p=1
Only 426 they have are pullouts https://www.rfparts.com/426-p.html
To use a larger or smaller type 6 core may require one more or less turn than the T50 size would need to get the same inductance.
73
If you are going to use this amp solely for CB you would be better off selling that amp and getting one similar (pair of 3-500's) specifically built as a CB amp. It would be much more efficient. That is if it is done properly.
The two compression variable caps and the torroid is all you should need. The lower bands use mica padders for the trimmers because a lot of capacitance is needed but on 10 meters only a small amount is needed and the padders alone should be more than enough. A .01uf would be way too much even for 160 meters. .01uf is like 10,000pf.
Post the part numbers and manufacturer of the original relays and maybe some one here will find them or maybe have some relays in stock. Include a picture of one of them.
DIP relays are a headache. They come in a bunch of sizes and pin layouts.
Trouble is, you need one that has pins that line up with the foil pads on the circuit board.
I have never found a proper cross-reference to identify which brand/part number can sub for another.
The type number found on the four relays already installed may or may not still be made. But identifying a substitute that will drop into the hole layout of the circuit board starts with that number.
73
Trouble is, you need one that has pins that line up with the foil pads on the circuit board.
I have never found a proper cross-reference to identify which brand/part number can sub for another.
The type number found on the four relays already installed may or may not still be made. But identifying a substitute that will drop into the hole layout of the circuit board starts with that number.
73
The relays in the LK-500 for switching inputs is a standard configuration of DPDT relays. Many different brands use that config. and should be no problem getting one.