Good catch. I missed that one. 150 Ohms in the pic I attached. Looks like it is the resistor in series with L205. Better check CR207 for damage too.
73
-Jim
NU0C
On Thu, 25 Jan 2024 09:48:49 -0800
"VE7PS" <ve7ps@...> wrote:
Rick:
You actually seem to have TWO failed resistors there. One is just above
P/J 206 in the pic - the one that's split in half...but if you look to the
right of that P/J, you'll see another burned resistor. I can open my RV-75
and take a look within the hour. Schematic isn't helping much and want to
be sure.
73
Peter
VE7PS
On Mon, Mar 13, 2023 at 10:23?AM Rick Boswell <frboswell@...> wrote:
I began checking out a new-to-me RV75 this AM and am seeing some issues I
dont yet understand. These are:
1. While the RV75 seems to be working in a basic fashion, the frequency
displayed on the TR7 varies by as much a 2 KHz over time, even with an
extneded warmup and without touching the tuning knob.
2. It is nearly impossible to set the frequenciny to the desired 100 Hz
increment; very small movements of the tuning knob produce a few hundred Hz
change in the displayed frequency.
3. The "Fixed Frequency" feature does not display the programmed
frequency. Programming is a bit convoluted but I have verified several
times that the switch settings are as described in the manual.
This is a a late serial number RV75 in very nice overall condition and was
serviced by Ron Baker in 2015; his invoice shows only minimal work needed.
My TR7 works as expected with an RV7 in place of the RV75.
So, wondering how best to proceed. Problems may be pilot error due to lack
of familiarity, but if so, not clear what the pilot is doing wrong. I have
a manual but am reluctant to dive into troubleshooting without a better
understanding as to what might cause these symptoms. Any guidance
appreciated.
Rick
K8EZB
--
73
-Jim
NU0C
Jim Shorney
