[Elecraft] KPA 100 L16 and RFC1

[Don Wilhelm]

Ray,

I have  only once found a toroid with a broken wire, and I suspect the 
builder nicked the wire when he was stripping the leads.

Yes, those 2 inductors have the holes in line with the silkscreen shape 
of the inductor.  There is no good reason why the cores have to align 
with the silkscreen, just snug up the leads and solder.

If you insist on using a fixative of some kind, a small dab of hot melt 
glue on either side of the core should be more than adequate. I do not 
recommend epoxy - if you ever have to re-wind the toroids, you will not 
get the epoxy off either the board or the toroid core.

73,
Don W3FPR

On 12/9/2012 5:31 PM, Ray Collins wrote:
> I am constructing the KPA 100 and have just fitted L16 and RFC1 (both blue cores wound with 37 turns of 26 gauge wire).  I am having difficulty getting the two toroids to sit securely on the PCB because the leads do not align with the holes in the PCB so preventing the toroids from being pulled tight against the board.  The toroids seem quite wobbly and I am concerned that with shock and vibration, the wires will break.  Any suggestions?  How about a very small amount of epoxy adhesive between toroids and PCB taking care to avoid the windings?
>