[Elecraft] K2 Transmitter Alignment

[Joe - aa4nn]

Hello, here's Joe continuing his check for why no output on 20/30m =
bands.

In the LPF, I removed L16 to L26 in hopes to confirm correct operation =
of the LPF relays.  I was only able to confirm that the "B" section of =
all 5 relays switched correctly the pins 7-8-9 for each selected band.  =
Pins 2-3-4 remain suspect.

I then removed relays K8-K12 quite easily with the Hakko 808 desoldering =
gun.  Using a small 5vdc supply I latched each relay back and forth to =
confirmed that pins 2-3-4 and pins 7-8-9 latched correctly.  A +5vdc on =
pin 10 latched pins 2-3 and 8-9 while a +5vdc on pin 1 latched pins 3-4 =
and 7-8.  Yet, the common bus for LPF in is still grounded.  Rats. =20

I remove the jumper at W1.  Bus is still grounded.  J14 is okay.  I =
follow LPF Bus source to sheet 4 and see leads 3 and 4 of T4 takes LPF =
practically straight to dc ground.  What a dead end I've come to.

So I suppose now I'll check the BPF relays etc, looking to get some =
output on 20/30m.  I don't have much faith that the relays are the =
problem, but I've gotta start somewhere.  Any other ideas?=20

73, Joe, aa4nn


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---