[Elecraft] K2 resistor question

Fri Nov 7 02:45:14 2003

> Question 3:  Although the manual calls for a 47Mfd capacitor (RF 
> board,  C73) all I have is a disk capacitor marked 4.7.  Is this the 
> correct one?

The cap should be a small blue one marked "470" ...

>
> Question 4:  RF board C71 & C174 calls for an 82Mfd but the only ones 
> I have are 820s.  The same?

Again, there are small blue colored caps marked "820" ...

>
> Question 5: Are NE602 (U10 & U11) the same as NE 612?

They will be marked with "NE / SA 612" and the SA may not be in the body 
markings. Both are the same.

Most of the information you seek is located in appendix A of the manual, 
as for the parts U10 & 11 see page 9 of that appendix.
When you get to the building of the temperature compensated pcb of RP3 
on the RF board, take your time, be very certain of the soldering on 
that pcb since it is not a plate thru hole and contact is critical. I 
soldered the leads on to my board by bending the lead from discarded 
component leads. Try to use leads that are thick enough to completely 
fill the hole on the pcb. I found that the leads from the larger 
resistor parts or caps were perfect. Make a small (1/8th" or less) bend 
of 90 degrees for the end that will mount in the pcb of the RP3 mod. 
Solder well and leave the leads going into the Rf pcb long enough to be 
able to give you about 1/8" or slightly higher clearance off the rf pcb. 
I had to bend my RP3 mod board slightly forward (that is leaning toward 
the rear of the rf pcb) so as not to impinge on the end of R22 located 
just behind and slightly to the right of the RP3 mod board.  Take your 
time, be careful and you'll be rewarded with a very fine radio!!
73, Mike Heit K2 # 3776 KD7YLA

-- 
73, de Michael Heit KD7YLA
"Real Hams do it at a high frequency"

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