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
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
