I would suspect a relay or relays on the LPF {Low Pass Filter} board has
failed. That would be K11 or K2 as they switch the filter components
for 80M both TX and RX. The relay coils are wired in parallel. The
80M section covers 2.5 MHz - 4.0 MHz. If one relay fails that band is
not operational. You can measure the relay coils in the circuit,
looking for a pair with higher resistance, indicating one of the two
coils is open. Your guess then as to which one has failed is a flip of
the coin. I usually remove both of them and replace both with new
ones. Although these relays are 12V relays, it is not uncommon for the
coil to open up.
Or perhaps logic voltage to switch to that band. Check the voltage at
pin #3 on U1 Could be a connector issue at J1.
Yes the receiver is an excellent receiver. Very quiet and the DSP
provides the IF selectivity while the filters provide roofing properties
and AGC protection from adjacent strong signals.
73
Bob, K4TAX
On Sep 21, 2019, at 11:14 PM, Paul DeWitte <k9ot@yousq.net> wrote:
Several months ago I bought an Eagle and until this AM I have been happy
with it.
In comparing the rcv of the Eagle to my Omni VI+ I found out that I have no
TX or RCV on 80m. The rest of the bands seem to be OK. I had only used it
on 30m up until now.
Not sure where to start looking. Any suggestions?
For what it is worth, on listening to DX on 160m I could copy Q5 C21WW on
the Eagle but not on the Omni VI+. I was able to narrow it up enough to get
rid of the QRN where the OmniVI+ I could not even with 250 filters in both
IFs.
Thanks for any replies,
73 Paul K9OT
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