Gentleman,
thanks for all so many replies. Will try to check all ideas tomorrow,
XYL permitting ... ;-).
73 Udo, DK5YA
P.S.: The issue occurs at the RX IN and TVTR IN ports of the KXV3A too.
Am 25.04.2016 um 17:57 schrieb Jerry:
Reseat the internal coax jumpers in the surf signal path.
Sent from my iPad
On Apr 25, 2016, at 11:52 AM, Graham g3tct <[email protected]> wrote:
Hi Udo
Before you start tearing the rig apart, two ideas:-
-is there a big difference for weak signals of say S4?
-if not, it may just be the S meter calibration that needs attention.
-if so, preamp on for either? Att on for main?
HTH
Graham
On 19:59, Udo Langenohl - DK5YA wrote:
Gentleman,
I'm struggling with a Main RX vs. Sub RX issue. My Main RX is rather deaf
compared to the Sub RX. I see at least 23.5dB attenuation between Main RX and
Sub RX when comparing highly stable signals from my signal generator (HP8664A).
This is only for ANT1/2 vs. AUX-IN!
Example:
-33dBm on 28.500
into AUX-IN (SUB RX): exactly 59 +40dB
into ANT 1 (Main RX): 59 +15dB
into ANT 2 (Main RX): 59 +15dB
I've checked all the usual suspects (pin diodes):
D1 and D5 on the KXV3A: o.k.
Each and every pin diode on the SUB IN board: o.k.
D5 on the Main RX board: o.k.
This is a K3 #59xx with almost everything inside money can buy.
My second K3 (serial #39xx) does not show this strange behavior. Main RX and
SUB RX show exactly the same values on ANT1/2 and AUX IN. -33dBm is 59+40 on
MAIN and SUB RX, no matter if Ant1, 2 or AUX IN.
Any idea? I'm searching for weeks now and I'm close to give up.
Udo, DK5YA
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