Make sure the contacts on the t/r relay are clean and that it is pulling
in properly.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
On 21 Nov 2017 18:32, Bob Darlington wrote:
Confirmed, the front panel does use Sylvania 1815 bulbs and the LED
replacements from Amazon worked just fine. I replaced the little GE 330
bulb in the power switch with an LED equivalent as well. Turns out the
1815 bulb is listed in the parts list and I just missed it the first time
around.
The knobs do use Bristol set screws. Never heard of this standard before
but now I own a small set of them for future work.
Got my first signal report on 40 meters. The guy said I just about knocked
is radio off the bench. Clean and crisp and loud.
And then I went back into the amp last night to add in a pair of diodes on
each meter and to take some pictures. I managed to unstick the sticky
"multi" meter on the left. I pulled the tubes and cleaned the chimneys and
reassembled after doing a little cleaning with a moistened paper towel.
The date code on the tubes is 7813. 13th week of 1978?
And after putting it back together I get no output. I did for a short
while and I'm not at all sure why I'm not getting output now. Only on 80
meters does the thing make the familiar hum and show grid and plate
current. And that's intermittent at best. I have to slam it into position
for it to work. SWR meter on my K3S is moving around a bit. Knocking my
knuckles on the chassis gets it to stop working and I have to give it a
good slam get it to produce power again. Every other band shows high SWR.
Sigh. Time to pull it apart and get it on the bench and rig up a signal
source and scope and troubleshoot. The SWR curve on 80 while it is working
looks to be quite different than it did before I broke it (I used an AA-55
to get a baseline curve and stored them for later comparison). It feels
like there is no input RF connection out to the filaments and yet I do get
output on one band (sometimes).
-Bob
N3XKB
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