PSK31

[KC2UGV]

yeah Ill switch it tonight to line in. rigs volume control is very twitchy.

as for 2m.... 440 is better.....

To help your twitchy audio, put a voltage isolation diode between the hot and ground of the audio in line.

[W2NAP]

To help your twitchy audio, put a voltage isolation diode between the hot and ground of the audio in line.

twitchy audio is something in the rig (prob knob dirty). you can go from whisper quiet to LOUD with a bump of the vol knob. and it can go back to whisper quiet without touching it..

just never got around to taking it apart to see what. when I make up the interface I will use the rx aud/tx aud port on the back.

for now I am just playing with it. on a crappy antenna to see what I can pick up.

pretty impressive really

[W2NAP]

I finally made a top 20 list. but anyway this is really kinda getting at me to get back on HF

[kb2vxa]

Twitchy audio means just look sideways at the volume control and the level the software sees changes drastically. The mic input has way too much gain! It belongs plugged into the line input where the change in volume control setting won't produce such a drastic change in the level the software sees so adjustment is broader and finding the correct level is much easier. I made the mistake of using the mic input and quickly learned I'd done something wrong. Don't get confused, transmit audio goes in the rig's mic input through a simple resistive voltage divider. The mic input usually is 600 ohms so the load resistor to ground is also 600 ohms and the series resistor selected for proper attenuation experimentally, 1K is a good place to start and usually goes up from there.

Isolation may be required if RF feedback is encountered, a couple of small 1:1 transformers. Usually a parts supplier has them marked as 600:600 ohms BUT it ain't necessarily so. The input impedance depends on the load impedance. A transformer transforms impedance so one may be used to transform one impedance to another as a matching transformer and one with a 1:1 turns ratio simply isolates input AC from output AC. Math starts getting complicated and I don't speak Greek so here I leave well enough alone, no sense in information overload when I've said enough.

[W2NAP]

Twitchy audio means just look sideways at the volume control and the level the software sees changes drastically. The mic input has way too much gain! It belongs plugged into the line input where the change in volume control setting won't produce such a drastic change in the level the software sees so adjustment is broader and finding the correct level is much easier. I made the mistake of using the mic input and quickly learned I'd done something wrong. Don't get confused, transmit audio goes in the rig's mic input through a simple resistive voltage divider. The mic input usually is 600 ohms so the load resistor to ground is also 600 ohms and the series resistor selected for proper attenuation experimentally, 1K is a good place to start and usually goes up from there.

Isolation may be required if RF feedback is encountered, a couple of small 1:1 transformers. Usually a parts supplier has them marked as 600:600 ohms BUT it ain't necessarily so. The input impedance depends on the load impedance. A transformer transforms impedance so one may be used to transform one impedance to another as a matching transformer and one with a 1:1 turns ratio simply isolates input AC from output AC. Math starts getting complicated and I don't speak Greek so here I leave well enough alone, no sense in information overload when I've said enough.

I cured the twitchy vol knob.. ( i said knob ) this am I made up a cable that uses the data in/out jack on the back of the ft-847 so the twitchy vol knob isnt an issue anymore. I also got my 20m dipole built. its hanging above my head. ( still need to get the 259 from a bud and check it out. ) but I got pretty close it looks. but with it in here I RFI my realtek usb wifi card. so Fri it looks like im heading up on the roof to hang the dipole outside.

and for the tx aud. yep I WILL have to isolate it. it didn't play nice kinda figured it wouldn't but I had to at least test it. also have to wait for my female db9's to come in so I can build my cat control cable. but hey maybe Fri I will at least be able to get on 20m SSB

as for now I just have fldigi running. reporting back to pskreporter what I hear (504 reports, 28 countries last week)

[W2NAP]

well I did manage to get my 20m dipole outside today.. signals improved a bit. but I can tell its still off on the tuning.. waiting for someone to bring me the damn 259 so I can check the damn thing..

sad part. I still wipe out the reltek usb wifi card. so even though I can get it in tune with the tuner.. no TX for me until I can find a way to stop the RF from pissing off the wifi card.