Hi,
I have the NEScaf filter. I got it as an unbuilt kit from another ham who was cleaning out the desk drawers. The schematics and theory/explanation of operation are available. There is no reason we cannot buy the parts and build one dead-bug ugly style. I have come to prefer the sound card DSP for performance but that requires a @#*! computer! Not very convenient carrying all that up a mountain. It will force several trips to and from parking lot to county park picnic table, too. Computers are not nearly as lenient on batteries as 3 watt radios either.
73,
Bill KU8H
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On 2/29/20 9:29 AM, Curt via Groups.Io wrote:
Not too surprising signals will be less robust on 20m than 80m in these solar conditions, but if you want more audio - go for it.
On my v4 I added a NESCAF audio filter at the output of the ubitx main board, so it feeds headphone jack and speaker.? I like this filter on both CW and SSB, but not being sold just now (maybe an alternative SCAF is out there)
If you go with Evan's solution - and use headphones - be careful and that's a lot of power into the ear (or just put this amplifier in the speaker path).
Plan B may be try different headphones if you have them, to see if they are more sensitive.? I do imagine the v6 has more audio than the v4.
73 curt
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bark less - wag more
