Hi all, Thanks again to this list, I've fixed the earlier S meter problem on my Omni VI+. The remaining problem that persists is low output and input on 12 meters. Initially, Dave K1FK indicated the
Do you get high SWR on 12 meters? Is the ALC light on when the transmitter goes into power limit? If so, one of the relays on the LPF board may be defective. This would result in high SWR so the ALC
I did not see the part about the low RX, sorry. Possibly the 12 meter crystal oscillator switching diode is bad (D14) or the coil (L21) is open. More likely, the solder joints around these two compon
As far as receive, the last low pass filter covers from 22 to 30 MHz, so if ten meters works that rules out a relay problem. You can verify relay select voltage for both 10 and 12 meters on the last
A decent scope would do fine. The frequency here is never greater than 39 MHz. Gary _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.c
Hi all, More investigation has narrowed the problem to the BPF/front end board 81593. We'll use 15 and 10 meters as our "working normally" and 12 meters as "working abnormally" for this discussion: -
Before you risk alignment, you can try my spare board. Gary _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tent
More likely than alignment as an issue, would be the switching diodes for 12 meters, or, again, bad soldering of the circuitry around those diodes and associated coils. You can check the continuity o
Hi Gary, Thanks! I'll check the switching diodes first as the easiest thing to remedy before engaging your kind offer of trying a spare board. The temporary 0.01 uF capacitor across the bandpass filt
Mark anything you can label before unplugging it to gain access to the can. -Stuart Rohre K5KVH _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.