I was playing with a Super VXO for 80 meters which worked out - had over 70 KHz swing down to 3.500 KHz which was what I was after. So then started working a 40 meter Super VXO. Got it to swing about 25 KHz which was encouraging. I decided to switch the osc circuit and use the one in the VRX-1 which is where I wanted to use this version of Super VXO. Well, the bandpass filter on my VRX-1 has never performed as well as I expected...so decided to pull the BPF and put in a RF Toolkit BPF from Parts & Kits. I tried it awhile ago by just sticking it to the front end of the original BFP and it got rid of all BCI. When today I decided to stick in the new BPF and I pulled the old BPF off but didn't consider impedance values. Well, a frustrating story shorten to one sentence...it didn't work as well as it did with the original BPF still in-line.

Need to reinstall the original BPF and mess around with the two variable caps (65pf) and see if I can get them do go down to 5 to 25 pf, as this seems to get rid of the BCI. I will get back to the 40 Meter Super VXO for the VRX-1/NS-40 once I get the front end of my VRX-1 straightened out.

This whole mess started when I was using the VRX-1 at night and some BCI was getting through. Wish now I understood the impedance in- and out- factors of BPF's. I can't get a 1uv signal through the mixer...50uv makes it through but most signals are never that strong off my antenna.