[Elecraft] No K2 Output
Richard Lim
[email protected]
Wed Feb 19 00:44:00 2003
Hi gang, well I need more help with the building of K2 #3232. Basically, I
completed all the construction and all resistance tests checked out. The
receive seems to work fine as evidenced by the 40m RX test and alignment,
however when I get to the transmitter tests I'm having problems.
When I set up to do the 40m Transmitter alignment, here is what happens. I=
f
I set power to 2W and key down, I get 0.1W output. My RX voltage/current i=
s
13.2/0.22 and TX 13.2/0.56.
I started the trouble shooting section and in the receiver tests I get:
PLL Ref. Oscillator and VCO
Pin 1 U4 =3D 0.9 (OK)
VCO Pin 3 U3=3D0.4 (OK)
VCO Buff Pin 6 U3=3D0.6 (OK)
BFO Output: Out Pin 6 U11=3D 0.3 (OK)
Buffer=3D 0.04 (OK)
Low-pass filter/ band pass/ T-R switch; Mixer, IF Amp, Crstal Filter: can't
do as I don't have a signal generator.
AGC
RF Max Pin 1 U2=3D3.6 (OK)
RF Min Pin 1 U2=3D4.6 (OK)
AGC Sat can't do no signal generator
Product Detector and AF Amp
Can't do no signal generator
IF Amp Noise Gain:
=20
I can't get a Vrms reading as my meter doesn=B9t seem to read Vrms
Transmitter:
Basic Voltage Check
I get D6 on RX of 7.7V
D7 on RX of 7.7V (Key down)
D10 voltage 13.6
Key down power 0.1 (Power dial set to 2W)
Also checking the control board Sidetone check of U6 Pin 25 I get 0VRMS
although I find this odd as the sidetown works ok and I can hear and adjust
the audio side tone and keyer speed.
Moving on:
ALC
U8 Pin 2=3D5.0V (key down, WAY OFF VALUE)
I stopped at this point as the trouble shooting guide implies that the
transmitter section is not working at all.
Where do I go from here? I'm of a totally non electronics background and
need step by step coaching on where to look next and what to do next. Any
help would be appreciated!!! Please email me direct [email protected].
Also anybody be willing to talk me through the steps via land line tomorrow
afternoon/PM (Central time)?
Thanks, Rich KQ9L