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Date
Re: Drive potmeters?
I have been operating FT8 for days between a few of us locally here. I have been feeding it into a cobweb antenna that doesn't have a 21 MHz element, the SWR is high but I have the power set to 15
By Ashhar Farhan · #94312 ·
Re: Drive potmeters?
FT8. de oz9ny, niels
By Niels Jalling · #94311 ·
Re: Drive potmeters?
Were you on CW? Venu (VU2BVB) blew his PA while running CW. It turned out that the relative level of CW was much higher than other digital modes and I am investigating this. I will know for sure by
By Ashhar Farhan · #94310 ·
Re: Drive potmeters?
I don't know the initial vswr. My antenna is a wire around 20 meters long with an automatic tuner at the end.? Then 5 meters coax between tuner and the rig. Normally it matches the PA in less than 20
By Niels Jalling · #94309 ·
Re: Drive potmeters?
Yes, thats right. How did you blow them up? Was the vswr high? Which mode were you on?
By Ashhar Farhan · #94308 ·
Drive potmeters?
I have just burnet the PA IRFZ24's. Where Is zero for the DRIVE_BIAS POT and PA_BIAS POT? Is it where you expect it at anti clock wise end. 73 de oz9ny, niels
By Niels Jalling · #94307 ·
Re: uBITX SWR Tolerance #ubitxv6
I can't tell the SWR numbers for my antenna but I have just burned one of the IRFZ24's in the PA. It was on 20m. Power settings was set to 5 and my antenna tuner didn't even finish the tuning process
By Niels Jalling · #94306 ·
Re: Pi Availability
But for those that do live near one, Pi 4 2 GB available this morning locally (Cleveland) $44.99 25+ in stock. -- 73 Bob? KD8CGH
By Bob Benedict, KD8CGH · #94305 ·
Re: Antuino #antuino
Thanks Somnath. We appreciate it. Thomas
By Support HF Signal · #94304 ·
Re: A stupid question sBITX
Yes, I am writing a webserver into the sBitx so you can run it off a webserver. - f
By Ashhar Farhan · #94303 ·
Re: Antuino #antuino
Excellent support by hfsignals, was able to repair the unit. Thanks. VU3FBT
By Somnath Dey · #94302 ·
Re: sBitx doubt
Welcome Charu, I am under the sBitx's spell for the last week! 73, Raj
By Raj vu2zap · #94301 ·
A stupid question sBITX
Can we run this Radio over VNC ? regards charudatt - VU2UPX
By Charudatt Uplap · #94300 ·
Re: sBitx doubt
Hi Farhan, Well this schematic is not up-to-date. Well one of your pledgers shared the updated schematic and made a things clear Can you please explain why did you use U3 instead of a simple DPDT
By Charudatt Uplap · #94299 ·
Re: sBitx doubt
Charu, Thanks for pointing this out. I will update it- f
By Ashhar Farhan · #94298 ·
Re: sBitx doubt
So Ravi, This updated schematic now makes a lot of sense. I guess Farhan should also update his schematic on github. Thanks Raj, you really made me sound like a dumb guy when you answered with the C4
By Charudatt Uplap · #94297 ·
Re: sBitx doubt
Hi Raj, Thank you for this information, at first glance this is different to the one posted here: https://github.com/afarhan/sbitx/blob/main/sbitx_main.pdf Anyway, will read the new one now. Cheers,
By Ravi Miranda · #94296 ·
Re: sBitx running FT8
Great scot! I am wondering if there is a single document that describes the js8call
By Ashhar Farhan · #94295 ·
Re: sBitx doubt
see here Ravi, attached circuits -
By Raj vu2zap · #94294 ·
Re: sBitx doubt
Hi Raj, Yes, the C4 goes to RF Tag, the wire from Pin 4 (U3) seems to be a remnant of some link unless it is meant to go to a specific location? Looking a bit further, The Antenna route goes from the
By Ravi Miranda · #94293 ·